CN117195662A - Method and system for predicting welding deformation of large structural part - Google Patents
Method and system for predicting welding deformation of large structural part Download PDFInfo
- Publication number
- CN117195662A CN117195662A CN202311399013.6A CN202311399013A CN117195662A CN 117195662 A CN117195662 A CN 117195662A CN 202311399013 A CN202311399013 A CN 202311399013A CN 117195662 A CN117195662 A CN 117195662A
- Authority
- CN
- China
- Prior art keywords
- welding
- deformation
- inherent
- measuring point
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 437
- 238000000034 method Methods 0.000 title claims abstract description 68
- 238000012360 testing method Methods 0.000 claims abstract description 114
- 238000004088 simulation Methods 0.000 claims abstract description 61
- 238000005259 measurement Methods 0.000 claims description 60
- 210000001503 joint Anatomy 0.000 claims description 40
- 238000005452 bending Methods 0.000 claims description 30
- 238000004364 calculation method Methods 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 14
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
Landscapes
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a method and a system for predicting welding deformation of a large structural part, which comprises the following steps of based on simulation inherent deformation parameters F k For inherent deformation parameter G k Updating, repeating iteration of the welding deformation simulation process of the welding joint finite element model until the inherent deformation parameters F are simulated k And inherent deformation parameter G k The ratio of (2) is within the set range Q, the inherent deformation parameter G k Corresponding welding test conditions and welding joint forms are used as inherent deformation data to be input into a welding deformation database; the intrinsic deformation data is corrected, so that the acquisition accuracy of the intrinsic deformation data is ensured; the inherent deformation data in the welding deformation database is called to carry out welding simulation on the finite element model of the structural member, and the welding deformation cloud picture of the structural member is obtained, so that the current large-scale structure is realizedAnd the structural part is welded for quick and accurate deformation prediction.
Description
Technical Field
The invention belongs to the technical field of welding deformation prediction, and particularly relates to a method and a system for predicting welding deformation of a large structural member.
Background
The field of engineering machinery often relates to welding of large structural parts, and welding seams of the structural parts have the characteristics of large number, large size and variable cross section, and residual stress and deformation are inevitably caused due to uneven heating and cooling in the welding process. The existence of welding deformation can influence the forming precision, and then influence the local intensity and the stability of structure, reduces product performance. Therefore, a great deal of manpower, material resources and time are required to be spent on the orthopedic treatment of the structural components after welding, even part of welded structural components cannot be corrected to meet the production requirement, and the production efficiency and the production cost of the product are greatly affected. How to effectively control the welding deformation becomes a matter of great concern for engineers.
With the development of numerical simulation technology, technicians apply the numerical simulation technology to simulation and prediction of welding deformation. The existing welding deformation prediction method mainly comprises a thermal elastic plastic finite element method and an inherent strain method. The thermal elastic plastic finite element method has accurate calculation result, but is too long for large structural members, has lower calculation efficiency, and can not meet the requirement of product design period.
The inherent strain method is a finite element analysis method based on elastic theory, and is very efficient in calculation, because the inherent strain of the welded joint is obtained and applied as an initial load to the whole weld joint to perform an elastic calculation once, thereby obtaining the welding deformation and residual stress of the whole structure. However, the inherent strain parameter is difficult to measure and the measurement accuracy is not high.
Disclosure of Invention
The invention aims to provide a method and a system for predicting welding deformation of a large structural member, which solve the technical problems of long prediction period, difficult measurement of inherent strain parameters and low measurement accuracy of the welding deformation of the current large structural member.
In order to achieve the above object, the first aspect of the present invention adopts the following technical scheme: a large structural member welding deformation prediction method comprises the following steps:
establishing a structural member finite element model according to a structural member to be predicted, and calling inherent deformation data in a welding deformation database to perform welding simulation on the structural member finite element model so as to obtain a welding deformation cloud picture of the structural member;
the acquisition process of the inherent deformation data in the welding deformation database comprises the following steps:
carrying out a welding test by respectively changing welding test conditions and welding joint forms, wherein a plurality of welding test plates are welded to form the welding joint in the welding test, and welding deformation data corresponding to each welding test are recorded; calculating an intrinsic deformation parameter G of a welding test plate based on welding deformation data k ；
Establishing a welding joint finite element model of a welding joint in a welding test based on a shell unit; according to the intrinsic deformation parameter G k Performing welding deformation simulation on the welding joint finite element model to obtain welding deformation simulation data; calculating simulation inherent deformation parameters F of welding test plate based on welding deformation simulation data k ；
If the inherent deformation parameter F is simulated k And inherent deformation parameter G k The ratio of (2) is outside the set range Q, based on the simulation inherent deformation parameter F k For inherent deformation parameter G k Updating, repeating iteration of the welding deformation simulation process of the welding joint finite element model until the inherent deformation parameters F are simulated k And inherent deformation parameter G k The ratio of (2) is within the set range Q, the inherent deformation parameter G k And the corresponding welding test conditions and welding joint forms are used as inherent deformation data to be input into a welding deformation database.
Preferably, the welding test conditions include a welding test plate thickness, a welding method, a welding material, a filler material, a welding position, a welding current, a welding voltage, and a welding speed.
Preferably, the weld joint forms include butt joints, T-joints, and lap joints.
Preferably, when the welded joint is in the form of a butt joint in the welding test, the intrinsic deformation parameter G of the welded test plate is calculated based on the welding deformation data k The method of (1) comprises:
when the welding joint in the welding test is in the form of a welding plate H A1 And a welding plate H B1 In the case of a butt joint, the welding plate H A1 And a welding plate H B1 Is uniformly provided with6 measuring points distributed in a 2X 3 matrix are marked as measuring points P i α ，i∈[1,…,12]The method comprises the steps of carrying out a first treatment on the surface of the Measuring pointMeasuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A1 One side remote from the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A1 One side close to the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B1 One side close to the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B1 One side remote from the butt joint; the welding deformation data comprise measuring points P before and after welding i α Position coordinates of (c);
when the welded joint is in the form of a butt joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta T Inherent longitudinal shrinkage delta L Inherent lateral bending θ T And an inherent longitudinal bending theta L The inherent deformation parameter G k The calculation formulas are respectively as follows:
in the formula (i),represented as a pre-weld measurement point P i α Initial abscissa,/-)>Represented as a pre-weld measurement point P i α Is,/, initial ordinate of (2)>Represented as post-weld deformation measurement point P i α Is>Represented as post-weld deformation measurement point P i α Is>Expressed as a measurement point after welding deformation>Measuring point->And measuring point->Fitting the chord length corresponding to the formed curve, +.>Expressed as a measurement point after welding deformation>Measuring point->And measuring point->Fitting the chord length corresponding to the formed curve, +.>For any measuring point after welding deformationP i α Displacement in the z-axis direction; b (B) α Is the butt joint width.
Preferably, when the welded joint is in the form of a T-joint in the welding test, the intrinsic deformation parameter G of the welding test plate is calculated based on the welding deformation data k The method of (1) comprises:
when the welding joint in the welding test is in the form of a welding plate H A2 And a welding plate H B2 When forming the T-shaped joint, the welding plate H A2 Is set as a bottom plate, and the welding plate H B2 Set as web plate, the welding plate H B2 Welded to the welding plate H A2 A middle position; the measuring point on the T-shaped joint is marked as a measuring pointWherein the measuring point->To the measuring point->Measurement Point->And measuring point->Is arranged on the welding plate H A2 Measuring Point->Measuring point->Measuring point->Measuring point->Measurement Point->And measuring point->Measuring point->Measuring point->Measuring point->Measurement Point->Symmetrically arranged on the welding plate H B2 Two sides; the measuring point->And measuring point->Is arranged on the welding plate H A2 And a welding plate H B2 A welding position; the measuring point->To the measuring point->Is arranged on the welding plate H B2 Applying;
when the welded joint is in the form of a T-joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta of the sole plate TP Inherent longitudinal shrinkage delta of the sole plate LP Natural transverse bending theta of base plate TP Natural longitudinal bending θ of the base plate LP Inherent transverse shrinkage delta of web TW Inherent longitudinal shrinkage delta of web LW Inherent lateral bending of web theta TW And inherent longitudinal bending theta of web LW The calculation formulas are respectively as follows:
δ TP ＝b-[(b+Δb)/2]/cos(θ T1 )-[(b+Δb)/2]/cos(θ T2 )
δ LP ＝ΔL×B/L
θ TP ＝sin -1 (e 1 /d 1 )+sin -1 (e 2 /d 2 )
δ TW ＝H-[(H-ΔH)/cos(tan -1 (c/H))]
δ LW ＝ΔL w ×H/L
θ TW ＝sin -1 (c/H)-[sin -1 (e 1 /d 1 )-sin -1 (e 2 /d 2 )]/2
θ LP ＝θ LW ＝0
in the formula (i),expressed as measurement point before welding->Initial abscissa,/-)>Expressed as measurement point before welding->Is,/, initial ordinate of (2)>Expressed as measurement point after welding deformation->Is>Expressed as post-weld measurement points->Is denoted as measurement point +.>And->Measuring point->And->Measuring point->And->Average value of distances between Y directions, Δb is represented as variation of b value after welding, L is represented as measurement point +.>And->Measuring point->And->The average value of the distances in the X direction, deltaL, is expressed as the welded plate H after welding A2 The variation of L of (B) is expressed as T-joint width, e 1 Represented as welded plate after weldingH A2 Deformation of left side in Z direction, e 2 Denoted as welded plate H A2 Deformation of right side in Z direction, d 1 Expressed as measuring points +.>And->Measuring point->And->Average value of distances between Y directions, d 2 Expressed as measuring points +.>And->Measuring point->And->The average value of the distances in the Y direction, H represents the height of the web, deltaH represents the shrinkage of the height of the web after welding, c represents the transverse displacement of the top end of the web after welding, deltaL w Denoted as welded plate H B2 The amount of change in L of (2).
Preferably, when the welded joint is formed as a lap joint in the welding test, the intrinsic deformation parameter G of the welded test plate is calculated based on the welding deformation data k The method of (1) comprises:
the welding joint in the welding test is in the form of a welding plate H A3 And a welding plate H B3 The welding plate H when in lap joint A3 And a welding plate H B3 6 measuring points distributed in a 2X 3 matrix are uniformly arranged on the surface of the substrate and are marked as measuring pointsMeasuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A3 A side remote from the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A3 One side adjacent to the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B3 One side adjacent to the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B3 A side remote from the overlap joint; the welding deformation data comprises measuring points before and after welding->Position coordinates of (c);
when the welded joint is in the form of a lap joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta T1 Inherent longitudinal shrinkage delta L1 Inherent lateral bending θ T1 Natural longitudinal bending θ L1 Inherent transverse shrinkage delta T2 Inherent longitudinal shrinkage delta L2 Inherent lateral bending θ T2 And an inherent longitudinal bending theta l2 The calculation formulas are respectively as follows:
δ T2 ＝δ T1
in the formula (i),expressed as measurement point before welding->Initial abscissa,/-)>Expressed as measurement point before welding->Is,/, initial ordinate of (2)>Expressed as post-weld measurement points->Is>Expressed as post-weld measurement points->Is>For any measuring point->Displacement in the z-axis direction; b (B) γ For lap joint length, c γ Expressed as joint overlap width, t γ Denoted as welded plate H A3 And a welding plate H B3 Is a thickness of (c).
Preferably, based on simulated intrinsic deformation parameters F k For inherent deformation parameter G k The method for updating comprises the following steps:
in the formula, G k+1 Denoted as the intrinsic deformation parameter after the k+1st update iteration.
Preferably, the intrinsic deformation parameter F is simulated k And inherent deformation parameter G k The ratio is set in the range of 0.9 to 1.1.
In a second aspect, the present invention provides a large structural member welding deformation prediction system, comprising:
the welding deformation prediction module is used for establishing a structural member finite element model according to the structural member to be predicted, calling inherent deformation data in the welding deformation database, and performing welding simulation on the structural member finite element model to obtain a welding deformation cloud image of the structural member;
the test data acquisition module is used for carrying out welding tests by respectively changing welding test conditions and welding joint forms, wherein a plurality of welding test plates are welded to form the welding joints in the welding tests, and welding deformation data corresponding to each welding test are recorded; based on welding deformation dataCalculating the inherent deformation parameter G of the welding test plate k ；
The calculation module is used for establishing a welding joint finite element model of the welding joint in the welding test based on the shell unit; according to the intrinsic deformation parameter G k Performing welding deformation simulation on the welding joint finite element model to obtain welding deformation simulation data; calculating simulation inherent deformation parameters F of welding test plate based on welding deformation simulation data k ；
An iteration module for simulating the inherent deformation parameter F k And inherent deformation parameter G k The ratio of (2) is outside the set range Q, based on the simulation inherent deformation parameter F k For inherent deformation parameter G k Updating, repeating iteration of the welding deformation simulation process of the welding joint finite element model until the inherent deformation parameters F are simulated k And inherent deformation parameter G k The ratio of (2) is within the set range Q, the inherent deformation parameter G k And the corresponding welding test conditions and welding joint forms are used as inherent deformation data to be input into a welding deformation database.
Preferably, the welding test conditions include a welding test plate thickness, a welding method, a welding material, a filler material, a welding position, a welding current, a welding voltage, and a welding speed.
Preferably, the weld joint forms include butt joints, T-joints, and lap joints.
Preferably, based on simulated intrinsic deformation parameters F k For inherent deformation parameter G k The method for updating comprises the following steps:
in the formula, G k+1 Denoted as the intrinsic deformation parameter after the k+1st update iteration.
Preferably, the intrinsic deformation parameter F is simulated k And inherent deformation parameter G k The ratio is set in the range of 0.9 to 1.1.
In a third aspect the invention provides an electronic device comprising a storage medium and a processor; the storage medium is used for storing instructions; the processor is configured to operate in accordance with the instructions to perform the method of the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
the invention simulates the inherent deformation parameter F k And inherent deformation parameter G k The ratio of (2) is outside the set range Q, based on the simulation inherent deformation parameter F k For inherent deformation parameter G k Updating, repeating iteration of the welding deformation simulation process of the welding joint finite element model until the inherent deformation parameters F are simulated k And inherent deformation parameter G k The ratio of (2) is within the set range Q, the inherent deformation parameter G k The corresponding welding test conditions and the welding joint form are used as inherent deformation data to be input into a welding deformation database, and the inherent deformation data are corrected, so that the acquisition accuracy of the inherent deformation data is ensured; and establishing a structural member finite element model according to the structural member to be predicted, calling inherent deformation data in a welding deformation database, performing welding simulation on the structural member finite element model, and obtaining a welding deformation cloud picture of the structural member to realize rapid and accurate deformation prediction on the welding of the current large structural member.
Drawings
FIG. 1 is a flow chart of a method for predicting welding deformation of a large structural member provided in example 1;
FIG. 2 is a comparative schematic illustration of the weld joint form provided in example 1;
FIG. 3 is a schematic view of a calculation model of the butt joint provided in example 1;
FIG. 4 is a schematic illustration of a dimension calculation model of the T-joint provided in example 1;
FIG. 5 is a schematic diagram of the distribution of test points of the T-joint provided in example 1;
FIG. 6 is a schematic view of a calculation model of the lap joint provided in example 1;
FIG. 7 is a flow chart of the intrinsic deformation data correction provided in example 1;
fig. 8 is a block diagram of a large structural member welding deformation prediction system provided in embodiment 2.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. The terms "front", "back", "left", "right", "upper", "lower" as used in the description of the present invention refer to directions in the drawings, and the terms "inner", "outer" refer to directions toward or away from the geometric center of a particular component, respectively.
Example 1
As shown in fig. 1 to 7, a method for predicting welding deformation of a large structural member includes
Establishing a structural member finite element model by utilizing Hypermesh software according to a structural member to be predicted, respectively endowing each component in the structural member finite element model with material elastic modulus, poisson ratio and thickness attribute, applying constraint conditions for the model based on actual conditions, and calling inherent deformation data in a welding deformation database to perform welding simulation on the structural member finite element model to obtain a welding deformation cloud picture of the structural member;
the acquisition process of the inherent deformation data in the welding deformation database comprises the following steps:
carrying out a welding test by respectively changing welding test conditions and welding joint forms, wherein a plurality of welding test plates are welded to form the welding joint in the welding test, and welding deformation data corresponding to each welding test are recorded; the welding test conditions comprise welding test plate thickness, welding method, welding material, filling material, welding position, welding current, welding voltage and welding speed; as shown in FIG. 2, the weld joint forms include butt joints, T-joints, anda lap joint; when the welding joint in the welding test is in the form of a butt joint, the inherent deformation parameter G of the welding test plate is calculated based on the welding deformation data k The method of (1) comprises:
as shown in FIG. 3, when the welded joint is in the form of a welded plate H in the welding test A1 And a welding plate H B1 In the case of a butt joint, the welding plate H A1 And a welding plate H B1 6 measuring points distributed in a 2X 3 matrix are uniformly arranged on the surface of the substrate and are marked as measuring points P i α ，i∈[1,…,12]The method comprises the steps of carrying out a first treatment on the surface of the Measuring pointMeasuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A1 One side remote from the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A1 One side close to the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B1 One side close to the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B1 One side remote from the butt joint; the welding deformation data comprise measuring points P before and after welding i α Position coordinates of (c); the butt joint panel welding test recommended dimensions are shown in table 1.
Table 1 recommended size table for butt joint plate welding test
When the welded joint is in the form of a butt joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta T Inherent longitudinal shrinkage delta L Inherent lateral bending θ T And an inherent longitudinal bending theta L The inherent deformation parameter G k The calculation formulas are respectively as follows:
in the formula (i),represented as a pre-weld measurement point P i α Initial abscissa,/-)>Represented as a pre-weld measurement point P i α Is,/, initial ordinate of (2)>Represented as post-weld deformation measurement point P i α Is>Represented as post-weld deformation measurement point P i α Is>Expressed as a measurement point after welding deformation>Measuring point->And measuring point->Fitting the chord length corresponding to the formed curve, +.>Expressed as a measurement point after welding deformation>Measuring point->And measuring point->Fitting the chord length corresponding to the formed curve, +.>For any measuring point P after welding deformation i α Displacement in the z-axis direction; b (B) α Is the butt joint width.
As shown in fig. 4 and 5, when the welded joint is in the form of a T-joint in the welding test, the intrinsic deformation parameter G of the welding test plate is calculated based on the welding deformation data k The method of (1) comprises:
when the welding joint in the welding test is in the form of a welding plate H A2 And a welding plate H B2 When forming the T-shaped joint, the welding plate H A2 Is set as a bottom plate, and the welding plate H B2 Set as web plate, the welding plate H B2 Welded to the welding plate H A2 A middle position; the measuring point on the T-shaped joint is marked as a measuring pointWherein the measuring point->To the measuring point->Measurement Point->And measuring point->Is arranged on the welding plate H A2 Measuring Point->Measuring point->Measuring point->Measuring point->Measurement Point->And measuring point->Measuring point->Measuring point->Measuring point->Measurement Point->Symmetrically arranged on the welding plate H B2 Two sides; the measuring point->And measuring point->Is arranged on the welding plate H A2 And a welding plate H B2 A welding position; the measuring point/>To the measuring point->Is arranged on the welding plate H B2 Applying; the parameters associated with the T-joint panel weld test are defined and recommended as shown in Table 2.
Table 2 definition of parameters and recommended dimensions for welding test of T-joint plates
When the welded joint is in the form of a T-joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta of the sole plate TP Inherent longitudinal shrinkage delta of the sole plate LP Natural transverse bending theta of base plate TP Natural longitudinal bending θ of the base plate LP Inherent transverse shrinkage delta of web TW Inherent longitudinal shrinkage delta of web LW Inherent lateral bending of web theta TW And inherent longitudinal bending theta of web LW The calculation formulas are respectively as follows:
δ TP ＝b-[(b+Δb)/2]/cos(θ T1 )-[(b+Δb)/2]/cos(θ T2 )
δ LP ＝ΔL×B/L
θ TP ＝sin -1 (e 1 /d 1 )+sin -1 (e 2 /d 2 )
δ TW ＝H-[(H-ΔH)/cos(tan -1 (c/H))]
δ LW ＝ΔL w ×H/L
θ TW ＝sin -1 (c/H)-[sin -1 (e 1 /d 1 )-sin -1 (e 2 /d 2 )]/2
θ LP ＝θ LW ＝0
in the formula (i),expressed as measurement point before welding->Initial abscissa,/-)>Expressed as measurement point before welding->Is,/, initial ordinate of (2)>Expressed as measurement point after welding deformation->Is>Expressed as post-weld measurement points->Is denoted as measurement point +.>And->Measuring point->And->Measuring point->And->Average value of distances between Y directions, Δb is represented as variation of b value after welding, L is represented as measurement point +.>And->Measuring point->And->The average value of the distances in the X direction, deltaL, is expressed as the welded plate H after welding A2 The variation of L of (B) is expressed as T-joint width, e 1 Denoted as welded plate H A2 Deformation of left side in Z direction, e 2 Denoted as welded plate H A2 Deformation of right side in Z direction, d 1 Expressed as measuring points +.>And->Measuring point->And->Average value of distances between Y directions, d 2 Expressed as measuring points +.>And->Measuring point->And->The average value of the distances in the Y direction, H represents the height of the web, deltaH represents the shrinkage of the height of the web after welding, c represents the transverse displacement of the top end of the web after welding, deltaL w Denoted as welded plate H B2 The amount of change in L of (2).
When the welded joint is formed as a lap joint in the welding test, as shown in FIG. 6, the intrinsic deformation parameter G of the welding test plate is calculated based on the welding deformation data k The method of (1) comprises:
when the welding joint in the welding test is in the form of a welding plate H A3 And a welding plate H B3 The welding plate H when in lap joint A3 And a welding plate H B3 6 measuring points distributed in a 2X 3 matrix are uniformly arranged on the surface of the substrate and are marked as measuring pointsMeasuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A3 A side remote from the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A3 One side adjacent to the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B3 One side adjacent to the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B3 A side remote from the overlap joint; the welding deformation data comprises measuring points before and after welding->Position coordinates of (c); the lap joint sheet welding test recommended dimensions are shown in table 3.
TABLE 3 recommended dimensions for lap joint sheet welding test
| OL | L | B | t | c | |
| Recommendation | 100t+c | 60t | 50t+c |
When the welded joint is in the form of a lap joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta T1 Inherent longitudinal shrinkage delta L1 Inherent lateral bending θ T1 Natural longitudinal bending θ L1 Inherent transverse shrinkage delta T2 Inherent longitudinal shrinkage delta L2 Inherent lateral bending θ T2 And an inherent longitudinal bending theta L2 The calculation formulas are respectively as follows:
δ T2 ＝δ T1
/>
in the formula (i),expressed as measurement point before welding->Initial abscissa,/-)>Expressed as measurement point before welding->Is,/, initial ordinate of (2)>Expressed as post-weld measurement points->Is>Expressed as post-weld measurement points->Is>For any measuring point->Displacement in the z-axis direction; b (B) γ For lap joint length, c γ Expressed as joint overlap width, t γ Denoted as welded plate H A3 And a welding plate H B3 Is a thickness of (2);
as shown in fig. 7, a weld joint finite element model is established for a weld joint in a welding test based on a shell unit; according to the intrinsic deformation parameter G k Performing welding deformation simulation on the welding joint finite element model to obtain welding deformation simulation data; in the implementation, welding deformation simulation is carried out on a welding joint finite element model by adopting welding deformation prediction software JWRIAN; calculating simulation inherent deformation parameters F of welding test plate based on welding deformation simulation data k ；
If the inherent deformation parameter F is simulated k And inherent deformation parameter G k The ratio of (2) is outside the set range Q, based on the simulation inherent deformation parameter F k For inherent deformation parameter G k The method for updating comprises the following steps:
in the formula, G k+1 Denoted as the intrinsic deformation parameter after the k+1st update iteration.
Repeating the iteration of the welding deformation simulation process of the welding joint finite element model until the inherent deformation parameters F are simulated k And inherent deformation parameter G k The ratio of (2) is within the set range Q, the inherent deformation parameter G k Corresponding welding test conditions and welding joint forms are used as inherent deformation data to be input into a welding deformation database; simulation of intrinsic deformation parameter F k And inherent deformation parameter G k The setting range Q of the ratio is 0.9 to 1.1; according to simulated intrinsic deformation parameters F k For inherent deformation parameter G k Iteration is carried out to eliminate errors caused by test measurement and realize inherent deformation parameters G k Is obtained with high accuracy.
The method has the advantages that the welding deformation prediction is carried out on the large structural member by utilizing the shell unit based on the inherent strain method, compared with the welding deformation simulation based on the thermal elastic plastic finite element, the prediction time is reduced to an hour level from a day level, the calculation efficiency is remarkably improved, and compared with the welding deformation simulation based on the inherent strain method of the entity unit, the model preprocessing work is changed from complex to simple, and the requirements on simulation personnel are reduced; the input of the inherent deformation parameters of the high-precision joint obtained based on the invention can realize the high-precision and high-efficiency prediction of the welding deformation of the large structural member.
According to the method, a welding deformation database is continuously expanded, a designer can conveniently call data at any time in a product design period to obtain a welding deformation cloud picture, a deformation trend and a deformation size are obtained according to the welding deformation cloud picture, key welding positions are determined, anti-deformation or constraint measures are applied to the key positions, the product design is guided through welding simulation results, and most of process tests can be replaced, so that the design period is effectively shortened, and the product research and development cost is saved.
Example 2
As shown in fig. 8, in a large structural member welding deformation prediction system, the system provided in this embodiment may apply the method described in embodiment 1, and the control method includes:
the welding deformation prediction module is used for establishing a structural member finite element model according to the structural member to be predicted, calling inherent deformation data in the welding deformation database, and performing welding simulation on the structural member finite element model to obtain a welding deformation cloud image of the structural member;
the test data acquisition module is used for carrying out welding tests by respectively changing welding test conditions and welding joint forms, wherein a plurality of welding test plates are welded to form the welding joints in the welding tests, and welding deformation data corresponding to each welding test are recorded; the welding test conditions comprise welding test plate thickness, welding method, welding material, filling material, welding position, welding current, welding voltage and welding speed; the welding joint comprises a butt joint, a T-shaped joint and a lap joint; based on simulation intrinsic deformation parameters F k For inherent deformation parameter G k The method for updating comprises the following steps:
in the formula, G k+1 Denoted as the intrinsic deformation parameter after the k+1st update iteration.
The calculation module is used for establishing a welding joint finite element model of the welding joint in the welding test based on the shell unit; according to the intrinsic deformation parameter G k Performing welding deformation simulation on the welding joint finite element model to obtain welding deformation simulation data; calculating simulation inherent deformation parameters F of welding test plate based on welding deformation simulation data k ；
An iteration module for simulating the inherent deformation parameter F k And inherent deformation parameter G k The ratio of (2) is outside the set range Q, based on the simulation inherent deformation parameter F k For inherent deformation parameter G k Updating, repeating iteration of the welding deformation simulation process of the welding joint finite element model until the inherent deformation parameters F are simulated k And inherent toDeformation parameter G k The ratio of (2) is within the set range Q, the inherent deformation parameter G k Corresponding welding test conditions and welding joint forms are used as inherent deformation data to be input into a welding deformation database; simulation of intrinsic deformation parameter F k And inherent deformation parameter G k The ratio is set in the range of 0.9 to 1.1.
Example 3
The electronic device includes a storage medium and a processor; the storage medium is used for storing instructions; the processor is configured to operate in accordance with the instructions to perform the method of embodiment 1.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (14)
1. A method for predicting welding deformation of a large structural member is characterized by comprising the following steps of
Establishing a structural member finite element model according to a structural member to be predicted, and calling inherent deformation data in a welding deformation database to perform welding simulation on the structural member finite element model so as to obtain a welding deformation cloud picture of the structural member;
the acquisition process of the inherent deformation data in the welding deformation database comprises the following steps:
carrying out a welding test by respectively changing welding test conditions and welding joint forms, wherein a plurality of welding test plates are welded to form the welding joint in the welding test, and welding deformation data corresponding to each welding test are recorded; calculating an intrinsic deformation parameter G of a welding test plate based on welding deformation data k ；
Establishing a welding joint finite element model of a welding joint in a welding test based on a shell unit; according to the intrinsic deformation parameter G k Performing welding deformation simulation on the welding joint finite element model to obtain welding deformation simulation data; calculating simulation inherent deformation parameters F of welding test plate based on welding deformation simulation data k ；
If the inherent deformation parameter F is simulated k And inherent deformation parameter G k The ratio of (2) is outside the set range Q, based on the simulation inherent deformation parameter F k For inherent deformation parameter G k Updating, repeating iteration of the welding deformation simulation process of the welding joint finite element model until the inherent deformation parameters F are simulated k And inherent deformation parameter G k The ratio of (2) is within the set range Q, the inherent deformation parameter G k And the corresponding welding test conditions and welding joint forms are used as inherent deformation data to be input into a welding deformation database.
2. The method of claim 1, wherein the welding test conditions include a welding test plate thickness, a welding method, a welding material, a filler material, a welding location, a welding current, a welding voltage, and a welding speed.
3. A method of predicting weld distortion of large structural members in accordance with claim 1, wherein said weld joint forms comprise butt joints, T-joints and lap joints.
4. A method of predicting welding deformation of a large structural member according to claim 3, wherein when the welded joint is in the form of a butt joint in the welding test, the inherent deformation parameter G of the welding test plate is calculated based on the welding deformation data k The method of (1) comprises:
when the welding joint in the welding test is in the form of a welding plate H A1 And a welding plate H B1 In the case of a butt joint, the welding plate H A1 And a welding plate H B1 6 measuring points distributed in a 2X 3 matrix are uniformly arranged on the surface of the substrate and are marked as measuring points P i α ，i∈[1,…,12]The method comprises the steps of carrying out a first treatment on the surface of the Measuring pointMeasuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A1 One side remote from the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A1 One side close to the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B1 One side close to the butt joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B1 One side remote from the butt joint; the welding deformation data comprise measuring points P before and after welding i α Position coordinates of (c);
when the welded joint is in the form of a butt joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta T Inherent longitudinal shrinkage delta L Inherent lateral bending θ T And an inherent longitudinal bending theta L The inherent deformation parameter G k The calculation formulas are respectively as follows:
in the formula (i),represented as a pre-weld measurement point P i α Initial abscissa,/-)>Denoted as weldingFront measurement point P i α Is,/, initial ordinate of (2)>Represented as post-weld deformation measurement point P i α Is>Represented as post-weld deformation measurement point P i α Is>Expressed as a measurement point after welding deformation>Measuring point->And measuring point->Fitting the chord length corresponding to the formed curve, +.>Expressed as a measurement point after welding deformation>Measuring point->And measuring point->Fitting the chord length corresponding to the formed curve, +.>For any measuring point P after welding deformation i α Displacement in the z-axis direction; b (B) α Is the butt joint width.
5. A method of predicting welding deformation of large structural member according to claim 3, wherein when the welded joint is in the form of a T-joint in the welding test, the intrinsic deformation parameter G of the welding test plate is calculated based on the welding deformation data k The method of (1) comprises:
when the welding joint in the welding test is in the form of a welding plate H A2 And a welding plate H B2 When forming the T-shaped joint, the welding plate H A2 Is set as a bottom plate, and the welding plate H B2 Set as web plate, the welding plate H B2 Welded to the welding plate H A2 A middle position; the measuring point on the T-shaped joint is marked as a measuring pointWherein the measuring point->To the measuring point->Measurement Point->And measuring point->Is arranged on the welding plate H A2 Measuring Point->Measuring point->Measuring point->Measuring point->Measurement Point->And measuring point->Measuring point->Measuring point->Measuring point->Measurement Point->Symmetrically arranged on the welding plate H B2 Two sides; the measuring point->And measuring point->Is arranged on the welding plate H A2 And a welding plate H B2 A welding position; the measuring point->To the measuring point->Is arranged on the welding plate H B2 Applying;
when the welded joint is in the form of a T-joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta of the sole plate TP Inherent longitudinal shrinkage delta of the sole plate LP Natural transverse bending theta of base plate TP Natural longitudinal bending θ of the base plate LP Inherent transverse shrinkage delta of web TW Inherent longitudinal shrinkage delta of web LW Inherent lateral bending of web theta TW And inherent longitudinal bending theta of web LW The calculation formulas are respectively as follows:
δ TP ＝b-[(b+Δb)/2]/cos(θ T1 )-[(b+Δb)/2]/cos(θ T2 )
δ LP ＝ΔL×B/L
θ TP ＝sin -1 (e 1 /d 1 )+sin -1 (e 2 /d 2 )
δ TW ＝H-[(H-ΔH)/cos(tan -1 (c/H))]
δ LW ＝ΔL w ×H/L
θ TW ＝sin -1 (c/H)-[sin -1 (e 1 /d 1 )-sin -1 (e 2 /d 2 )]/2
θ LP ＝θ LW ＝0
in the formula (i),expressed as measurement point before welding->Initial abscissa,/-)>Expressed as measurement point before welding->Is,/, initial ordinate of (2)>Expressed as measurement point after welding deformation->Is>Expressed as post-weld measurement points->Is denoted as measurement point +.>And->Measuring point->And->Measuring point->And->Average value of distances between Y directions, Δb is expressed as weldingThe variation of the value b after that, L is denoted as measuring point +.>And->Measuring point->And->The average value of the distances in the X direction, deltaL, is expressed as the welded plate H after welding A2 The variation of L of (B) is expressed as T-joint width, e 1 Denoted as welded plate H A2 Deformation of left side in Z direction, e 2 Denoted as welded plate H A2 Deformation of right side in Z direction, d 1 Expressed as measuring points +.>And->Measuring point->And->Average value of distances between Y directions, d 2 Expressed as measuring points +.>And (3) withMeasuring point->And->The average value of the distances in the Y direction, H represents the height of the web, deltaH represents the shrinkage of the height of the web after welding, c represents the transverse displacement of the top end of the web after welding, deltaL w Denoted as welded plate H B2 The amount of change in L of (2).
6. A method of predicting welding deformation of large structural member according to claim 3, wherein when the welded joint is formed as a lap joint in the welding test, the inherent deformation parameter G of the welding test plate is calculated based on the welding deformation data k The method of (1) comprises:
when the welding joint in the welding test is in the form of a welding plate H A3 And a welding plate H B3 The welding plate H when in lap joint A3 And a welding plate H B3 6 measuring points distributed in a 2X 3 matrix are uniformly arranged on the surface of the substrate and are marked as measuring pointsMeasuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A3 A side remote from the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H A3 One side adjacent to the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B3 One side adjacent to the overlap joint; measuring point->Measuring point->And measuring point->Arranged in the same row and arranged on the welding plate H B3 A side remote from the overlap joint; the welding deformation data comprises measuring points before and after welding->Position coordinates of (c);
when the welded joint is in the form of a lap joint in a welding test, the intrinsic deformation parameter G k Comprising inherent transverse shrinkage delta T1 Inherent longitudinal shrinkage delta L1 Inherent lateral bending θ T1 Natural longitudinal bending θ L1 Inherent transverse shrinkage delta T2 Inherent longitudinal shrinkage delta L2 Inherent lateral bending θ T2 And an inherent longitudinal bending theta L2 The calculation formulas are respectively as follows:
δ T2 ＝δ T1
in the formula (i),expressed as measurement point before welding->Initial abscissa,/-)>Expressed as measurement point before welding->Is,/, initial ordinate of (2)>Expressed as post-weld measurement points->Is>Expressed as post-weld measurement points->Is>For any measuring point->Displacement in the z-axis direction; b (B) γ For lap joint length, c γ Expressed as joint overlap width, t γ Denoted as welded plate H A3 And a welding plate H B3 Is a thickness of (c).
7. The method for predicting welding deformation of large structural member according to claim 1, wherein the method is based on a simulation inherent deformation parameter F k For inherent deformation parameter G k The method for updating comprises the following steps:
in the formula, G k+1 Denoted as the intrinsic deformation parameter after the k+1st update iteration.
8. The method for predicting welding deformation of large structural member according to claim 1, wherein the intrinsic deformation parameter F is simulated k And inherent deformation parameter G k The ratio is set in the range of 0.9 to 1.1.
9. A large structural member welding deformation prediction system, comprising:
the welding deformation prediction module is used for establishing a structural member finite element model according to the structural member to be predicted, calling inherent deformation data in the welding deformation database, and performing welding simulation on the structural member finite element model to obtain a welding deformation cloud image of the structural member;
the test data acquisition module is used for carrying out welding tests by respectively changing welding test conditions and welding joint forms, wherein a plurality of welding test plates are welded to form the welding joints in the welding tests, and welding deformation data corresponding to each welding test are recorded; calculating an intrinsic deformation parameter G of a welding test plate based on welding deformation data k ；
The calculation module is used for establishing a welding joint finite element model of the welding joint in the welding test based on the shell unit; root of Chinese characterAccording to the inherent deformation parameter G k Performing welding deformation simulation on the welding joint finite element model to obtain welding deformation simulation data; calculating simulation inherent deformation parameters F of welding test plate based on welding deformation simulation data k ；
An iteration module for simulating the inherent deformation parameter F k And inherent deformation parameter G k The ratio of (2) is outside the set range Q, based on the simulation inherent deformation parameter F k For inherent deformation parameter G k Updating, repeating iteration of the welding deformation simulation process of the welding joint finite element model until the inherent deformation parameters F are simulated k And inherent deformation parameter G k The ratio of (2) is within the set range Q, the inherent deformation parameter G k And the corresponding welding test conditions and welding joint forms are used as inherent deformation data to be input into a welding deformation database.
10. The large structural member weld distortion prediction system of claim 9 wherein the weld test conditions include weld test plate thickness, welding method, welding material, filler material, weld location, welding current, welding voltage, and welding speed.
11. The large structural member weld distortion prediction system of claim 9 wherein the weld joint forms include butt joints, T-joints, and lap joints.
12. The large structural member welding deformation prediction system according to claim 9, wherein the simulation-based inherent deformation parameter F k For inherent deformation parameter G k The method for updating comprises the following steps:
in the formula, G k+1 Denoted as the intrinsic deformation parameter after the k+1st update iteration.
13. A large structural member welding deformation prediction system according to claim 9, wherein the intrinsic deformation parameter F is simulated k And inherent deformation parameter G k The ratio is set in the range of 0.9 to 1.1.
14. The electronic device includes a storage medium and a processor; the storage medium is used for storing instructions; the processor is operative to perform the method of any one of claims 1 to 8 in accordance with the instructions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311399013.6A CN117195662A (en) | 2023-10-26 | 2023-10-26 | Method and system for predicting welding deformation of large structural part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311399013.6A CN117195662A (en) | 2023-10-26 | 2023-10-26 | Method and system for predicting welding deformation of large structural part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117195662A true CN117195662A (en) | 2023-12-08 |
Family
ID=88988957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311399013.6A Pending CN117195662A (en) | 2023-10-26 | 2023-10-26 | Method and system for predicting welding deformation of large structural part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117195662A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117436321A (en) * | 2023-12-21 | 2024-01-23 | 中钧科技(深圳)有限公司 | Workpiece welding analysis method and system based on finite element simulation method |
-
2023
- 2023-10-26 CN CN202311399013.6A patent/CN117195662A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117436321A (en) * | 2023-12-21 | 2024-01-23 | 中钧科技(深圳)有限公司 | Workpiece welding analysis method and system based on finite element simulation method |
| CN117436321B (en) * | 2023-12-21 | 2024-04-16 | 中钧科技(深圳)有限公司 | Workpiece welding analysis method and system based on finite element simulation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106041344B (en) | A kind of laser peening school form quality amount control method for aeroplane engine machine support | |
| US6560498B1 (en) | Formation method and device for curved plates | |
| CN117195662A (en) | Method and system for predicting welding deformation of large structural part | |
| CN107545080B (en) | Steel bridge virtual pre-assembly method based on BIM model | |
| US20040194051A1 (en) | Finite element modeling system and method for modeling large-deformations using self-adaptive rezoning indicators derived from eigenvalue testing | |
| CN106529055A (en) | Model updating method based on strain modal shape correlation | |
| JPWO2005093612A1 (en) | Welding deformation calculation method, welding deformation calculation device, and computer program | |
| CN109359336A (en) | A kind of similar distortion model construction method of lashing bridge based on multiple-objection optimization | |
| CN109255141B (en) | Optimization method for cross section shape of forward conceptual design of automobile body | |
| KR20110102479A (en) | Inplane compressive strength evaluation device and method | |
| JP2020504859A (en) | Design method to optimize the shape of the spatial thin film structure jig that suppresses wrinkles | |
| CN110516365A (en) | A method of test bolt joint stiffness | |
| CN114942000B (en) | Detection and calibration method for tail transmission shaft of helicopter | |
| CN108009327A (en) | A kind of virtual preassembling error decision method based on steel member deformation analysis | |
| CN108804725A (en) | A kind of computational methods of welding anti-distortion amount | |
| CN116579207A (en) | Variable reliability model determining method for predicting and optimizing residual stress after welding and spot welding | |
| Zongo et al. | Geometric deviations of laser powder bed–fused AlSi10Mg components: numerical predictions versus experimental measurements | |
| CN113523656B (en) | Welding reversible deformation design method for structural part | |
| CN115544842A (en) | Welding deformation simulation method, device, equipment and storage medium | |
| CN108229009A (en) | Design generation method, the apparatus and system of Assembly part model | |
| CN103324032B (en) | Polyhedron main substrate, manufacturing method and processing method thereof | |
| Turlier et al. | FEA shell element model for enhanced structural stress analysis of seam welds | |
| CN114880904A (en) | Large-scale finite element analysis method for rubber bushing | |
| KR20130101792A (en) | Method for simulation of buckling for structure | |
| JP2005201677A (en) | Inherent deformation computing apparatus, computer program, record medium, and method for computing inherent deformation at welding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |