CN109543360A - A kind of finite element method for evaluating iron tower of power transmission line bolt strength - Google Patents
A kind of finite element method for evaluating iron tower of power transmission line bolt strength Download PDFInfo
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- CN109543360A CN109543360A CN201910048696.8A CN201910048696A CN109543360A CN 109543360 A CN109543360 A CN 109543360A CN 201910048696 A CN201910048696 A CN 201910048696A CN 109543360 A CN109543360 A CN 109543360A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 17
- 238000004458 analytical method Methods 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 7
- 244000025254 Cannabis sativa Species 0.000 claims abstract description 5
- 238000012805 post-processing Methods 0.000 claims abstract description 5
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 230000003068 static effect Effects 0.000 claims abstract description 4
- 238000011156 evaluation Methods 0.000 claims description 8
- 238000004088 simulation Methods 0.000 claims description 6
- 230000003416 augmentation Effects 0.000 claims description 3
- 238000004422 calculation algorithm Methods 0.000 claims description 3
- 238000007598 dipping method Methods 0.000 claims description 3
- 238000005246 galvanizing Methods 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
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Abstract
The invention discloses a kind of finite element methods for evaluating iron tower of power transmission line bolt strength, it specifically includes that and draws function using the grass of ABAQUS software, the three-dimensional entity model for creating bolt screw rod and nut operates the threaded portion for generating screw bolt and nut using Boolean calculation；The material parameter of screw bolt and nut is defined according to the true stress-strain curve of bolt；According to two analysis steps of bench test schema definition, analysis step type is static(al), general, and face applies axial pre tightening force in analysis step a pair of screw rod, and analysis step two applies alternating load to model；Cell type chooses the ten node tetrahedron element C3D10M for being suitable for contact analysis in ABAQUS；Finally in post-processing module, pretightning force, contact pressure, stress and plastic deformation cloud atlas are exported, and exports the result data of contact surface.The present invention can quickly obtain stress and deformation result of the bolt under alternating load, and the failure mechanism that can effectively analyze bolt is combined with test, improves the security reliability of power transmission tower bolt, reduces design cost.
Description
Technical field
The present invention relates to iron tower of power transmission line bolt strength research fields, especially provide a kind of evaluation iron tower of power transmission line spiral shell
The finite element method of bolt intensity.
Background technique
Power transmission tower is the supporting point of aerial condutor, and structural reliability is the key factor for guaranteeing that transmission line of electricity is stable.It passes
System power transmission tower is set up by angle steel overlap joint, carries out single side connection by bolt between angle steel.The self weight of conducting wire, wind load and
Under the long terms of load such as ice load, loosening and fatigue rupture easily occur for the bolt of angle cleat, lead to power transmission tower Stiffness,
Make power transmission tower that local buckling and tower occur, ultimately causes transmission line of electricity damage.Therefore, the failure shape of power transmission tower bolt is studied
Formula improves the quality of connection of angle steel and the reliability of Transmission Tower, is of great significance to the safety for guaranteeing transmission line of electricity.
Bolt fastening structure is widely used in Transmission Tower because having many advantages, such as that disassembly is simple, safe and reliable, by
Single side connection type between power transmission tower angle steel, so that bolt bears the effect of lateral load.In alternate load effect
Under, there are mainly two types of the failure modes of bolt: fatigue fracture and certainly relaxation.For bolt failure mode, there is an urgent need to one kind to grind
Study carefully the evaluation method of iron tower of power transmission line bolt strength, therefore, proposes a kind of evaluation iron tower of power transmission line bolt strength here
Finite element method.
Summary of the invention
The purpose of the present invention is to provide a kind of finite element methods for evaluating iron tower of power transmission line bolt strength.This side
Method can help us to recognize intensity of the bolt under alternating load, be the optimization of later production technology, improve transmission line of electricity iron
The intensity of tower provides help.
The present invention is mainly achieved through the following technical solutions: a kind of finite element fraction for evaluating iron tower of power transmission line bolt strength
Analysis method, comprising the following steps:
One, it according to power industry standard " electric power line pole tower and electric armour clamp galvanizing by dipping bolts and nuts ", establishes
The analysis model of iron tower of power transmission line bolt, nut and clamping plate
Firstly, drawing the three-dimensional that bolt, nut and clamping plate is respectively created in function using the grass of commercial finite element software ABAQUS
Physical model.Then, in establishing criteria screw bolt and nut strength grade definition material property parameters, and according to bench test side
Case defines bolt, nut and clamping plate and contacts, and sets to normal direction with tangential contact attribute.Finally, because bolt, spiral shell
Contact is defined between female and clamping plate, so cell type selects the ten node tetrahedron element C3D10M for being suitable for contact analysis,
To analysis model given unit attribute；
Two, according to the loading scheme of bolt bench test, the load boundary condition of simulation analysis model is established
To the scheme of the first pre- next load of bolt in foundation test, two analysis steps are set in ABAQUS, wherein analysis
Step one mainly completes the load under bolt pretightening load, studies stress state of the bolt under initial pretightening force, analysis step two
Alternating load is applied to bolt clamping plate, carries out the bolt strength analysis under alternating load.
Three, according to intensity evaluation criterion, the calculated result of simulation analysis model is exported
Firstly, the definition and output of pretightning force result, CFORCE and CSTATUS option is chosen in output setting on the scene,
He remains unchanged default setting.Then, in the post-processing module of ABAQUS, export the pretightning force of bolt axial direction, contact pressure,
Stress and plastic deformation result.
The present invention proposes a kind of finite element method for evaluating iron tower of power transmission line bolt strength, can quickly obtain bolt
Stress and deformation result under alternating load combine the failure mechanism that can effectively analyze bolt with test, improve bolt
Security reliability reduces design cost.
Further, in said step 1, the creation of three-dimensional entity model initially sets up the three of screw rod, nut and screw thread
Then dimension module generates the screw thread of screw bolt and nut using the Boolean calculation of ABAQUS.
Further, in said step 1, the definition of material parameter is bent according to trus stress-strain of Mechanics Performance Testing
What line obtained.
Further, in said step 1, the definition of attribute is contacted, contact normal direction is defined as ' hard ' contact, Contact Algorithm
It is chosen for augmentation Lagrangian method, contacting the tangential coefficient of friction that defines is 0.1.
Further, in the step 2, the static(al) of ABAQUS, Gneral analysis step are selected in the definition of analysis step.
Further, in the step 2, the applying method of pretightning force defines Bolt Load method in option using load,
Face position applies axial pre tightening force in screw rod.
Further, in the step 2, lower clamp plate applies fixed constraint, and upper clamp plate applies alternating load.
The beneficial effects of the present invention are:
A kind of finite element method for evaluating iron tower of power transmission line bolt strength of the present invention, the method is according to power industry
Standard, the grass based on ABAQUS draw the finite element analysis model that function quickly establishes evaluation bolt strength.The method uses
The functions such as ABAQUS modeling, load and post-processing, need not rely on the help of other CAD modeling softwares and grid dividing software,
The Model On The Strength that bolt can quickly be established, when avoiding the model between different software and mutually importing, because of geometrical boundary and category
The loss of property parameter and caused by error.In addition, the method is built completely in accordance with power industry standard and bench test scheme
Mould and load have the advantages that accuracy height and with strong points, meanwhile, the analog result of this method is combined with test to be had
The failure mechanism of effect analysis bolt, quickly improves the design of bolt, improves the security reliability of bolt, reduce design cost.
Detailed description of the invention
Fig. 1 bolt, nut and clamping plate grid schematic diagram；
Fig. 2 bolt pretightening loads schematic diagram；
Screw rod equivalent stress schematic diagram under Fig. 3 alternating load；
Screw rod plastic strain schematic diagram under Fig. 4 alternating load；
Screw rod contact condition schematic diagram under Fig. 5 alternating load；
Fig. 6 bolt, nut and clamping plate schematic diagram.
Specific embodiment
Specific introduction and explanation are made to technical solution of the present invention with reference to the accompanying drawing, the present invention provides a kind of evaluations
The finite element method of iron tower of power transmission line bolt strength, particular content are as follows:
One, it according to power industry standard " electric power line pole tower and electric armour clamp galvanizing by dipping bolts and nuts ", establishes
The analysis model of iron tower of power transmission line bolt, nut and clamping plate
Firstly, drawing function, rendering model two-dimensional engineering graphic using the grass of commercial finite element software ABAQUS, then pass through rotation
Order generates the three-dimensional entity model of screw bolt and nut, wherein the creation of screw thread is generated using Boolean calculation operation.Then, it presses
According to the strength grade definition material attribute of screw bolt and nut, and the true stress-true strain curve obtained according to Mechanics Performance Testing, it will
The corresponding relationship of plastic strain and stress is input in software.According to the loading scheme of bench test, respectively to bolt, nut and
Clamping plate definition contact, contact normal direction are defined as ' hard ' contact, and Contact Algorithm is chosen for augmentation Lagrangian method, contact tangential definition
Coefficient of friction is 0.1.Finally, the ten node tetrahedron element C3D10M for being suitable for contact analysis in ABAQUS are chosen, to analysis
Model given unit attribute (such as Fig. 1).
Two, according to the loading scheme of bolt bench test, the load boundary condition of simulation analysis model is established
To the scheme of the first pre- next load of bolt in foundation test, two analysis steps, analysis step class are set in ABAQUS
Type is static(al), Gneral analysis step, wherein analysis step one defines Bolt Load method in option, the face position in screw rod using load
Apply axial pre tightening force (such as Fig. 2), study stress state of the bolt under initial pretightening force, analysis step two applies lower clamp plate solid
Conclude a contract or treaty beam, upper clamp plate applies alternating load, carries out the bolt strength analysis under alternating load.
Three, according to intensity evaluation criterion, the calculated result of simulation analysis model is exported
Firstly, being defined in preceding processing to axial pre tightening force, the CFORCE and CSTATUS in the output setting of field are chosen
Option, other default settings remain unchanged.Then, it in the post-processing module of ABAQUS, exports the pretightning force of bolt axial direction, connect
Touch pressure, stress and plastic deformation cloud atlas (such as Fig. 3~5), result data output on the scene set in define contact surface node set,
Then pretightning force, stress and plastic deformation result are exported.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (8)
1. a kind of finite element method for evaluating iron tower of power transmission line bolt strength, which comprises the following steps:
Step 1: being established according to power industry standard " electric power line pole tower and electric armour clamp galvanizing by dipping bolts and nuts "
The analysis model of iron tower of power transmission line bolt, nut and clamping plate:
(1) creation of three-dimensional entity model draws function creation bolt, nut and clamping plate using the grass of finite element software ABAQUS
Three-dimensional entity model；
(2) definition of material parameter, the strength grade definition material parameter of screw bolt and nut in establishing criteria；
(3) definition of model contact, defines bolt, nut and clamping plate according to bench test scheme and contacts, and to normal direction and cuts
To contact attribute set；
(4) selection of cell type, choose ABAQUS in be suitable for contact analysis ten node tetrahedron element C3D10M, to point
Analyse model given unit attribute；
Step 2: establishing the load boundary condition of simulation analysis model according to the loading scheme of bolt bench test:
(1) definition of analysis step, in test first pre-tightens bolt, then carries out bench test, defines in ABAQUS
Two analysis steps；
(2) definition of load boundary defines bolt pretightening in analysis step one, and the friendship of bench test is defined in analysis step two
Varying load；
Step 3: exporting the calculated result of simulation analysis model according to intensity evaluation criterion:
(1) definition and output of pretightning force result chooses CFORCE and CSTATUS option in output on the scene setting, other defaults
Setting remains unchanged；
(2) in the post-processing module of ABAQUS, pretightning force, contact pressure, stress and the plastic deformation knot of bolt axial direction are exported
Fruit.
2. analysis method according to claim 1, it is characterised in that: in the step 1, the creation of three-dimensional entity model,
The threedimensional model of screw rod, nut and screw thread is initially set up, the spiral shell of screw bolt and nut is then generated using the Boolean calculation of ABAQUS
Line.
3. analysis method according to claim 1, it is characterised in that: in the step 1, the definition of material parameter according to
The true stress-true strain curve of Mechanics Performance Testing obtains.
4. analysis method according to claim 1, it is characterised in that: in the step 1, contact the definition of attribute, contact
Normal direction is defined as ' hard ' contact, and Contact Algorithm is chosen for augmentation Lagrangian method, and contacting the tangential coefficient of friction that defines is 0.1.
5. analysis method according to claim 1, it is characterised in that: in the step 2, the definition of analysis step is selected
The static(al) of ABAQUS, Gneral analysis step.
6. analysis method according to claim 1, it is characterised in that: in the step 2, the applying method of pretightning force is adopted
Bolt Load method in option is defined with load, face position applies axial pre tightening force in screw rod.
7. analysis method according to claim 1, it is characterised in that: in the step 2, lower clamp plate applies fixed constraint,
Upper clamp plate applies alternating load.
8. analysis method according to claim 1, it is characterised in that: in the step 3, result data output on the scene is set
Contact surface node set is defined in fixed, then exports axial pre tightening force, stress and plastic strain.
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| CN201910048696.8A CN109543360A (en) | 2019-01-18 | 2019-01-18 | A kind of finite element method for evaluating iron tower of power transmission line bolt strength |
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| CN201910048696.8A CN109543360A (en) | 2019-01-18 | 2019-01-18 | A kind of finite element method for evaluating iron tower of power transmission line bolt strength |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110334426A (en) * | 2019-06-26 | 2019-10-15 | 武汉蓝恩汽车技术有限公司 | Bolt strength evaluation method for failure and system |
| CN112199797A (en) * | 2020-10-28 | 2021-01-08 | 北奔重型汽车集团有限公司 | Modeling calculation method of bolt structure |
| CN112692745A (en) * | 2020-08-21 | 2021-04-23 | 深圳市科锐技术有限公司 | Lightning protection equipment bridging clamp and size design method thereof |
| CN112699465A (en) * | 2020-12-29 | 2021-04-23 | 中国航空工业集团公司西安飞机设计研究所 | ABAQUS-based multi-bolt connection knot building model method |
| CN113297711A (en) * | 2021-07-28 | 2021-08-24 | 广东电网有限责任公司中山供电局 | Structure optimization method and device for passive loosening early warning bolt |
| CN114626273A (en) * | 2022-03-31 | 2022-06-14 | 广州思茂信息科技有限公司 | Finite element parametric modeling method for hexahedral gridding divided bolt and nut |
| CN117494353A (en) * | 2024-01-02 | 2024-02-02 | 航天精工股份有限公司 | Design checking integration-based forward design method for fastening connection |
| CN117610384A (en) * | 2024-01-23 | 2024-02-27 | 航天精工股份有限公司 | Simulation analysis method of fastening connection system based on engineering actual distribution |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110334426A (en) * | 2019-06-26 | 2019-10-15 | 武汉蓝恩汽车技术有限公司 | Bolt strength evaluation method for failure and system |
| CN110334426B (en) * | 2019-06-26 | 2022-12-16 | 武汉蓝恩汽车技术有限公司 | Bolt strength failure evaluation method and system |
| CN112692745A (en) * | 2020-08-21 | 2021-04-23 | 深圳市科锐技术有限公司 | Lightning protection equipment bridging clamp and size design method thereof |
| CN112199797A (en) * | 2020-10-28 | 2021-01-08 | 北奔重型汽车集团有限公司 | Modeling calculation method of bolt structure |
| CN112699465A (en) * | 2020-12-29 | 2021-04-23 | 中国航空工业集团公司西安飞机设计研究所 | ABAQUS-based multi-bolt connection knot building model method |
| CN113297711A (en) * | 2021-07-28 | 2021-08-24 | 广东电网有限责任公司中山供电局 | Structure optimization method and device for passive loosening early warning bolt |
| CN114626273A (en) * | 2022-03-31 | 2022-06-14 | 广州思茂信息科技有限公司 | Finite element parametric modeling method for hexahedral gridding divided bolt and nut |
| CN117494353A (en) * | 2024-01-02 | 2024-02-02 | 航天精工股份有限公司 | Design checking integration-based forward design method for fastening connection |
| CN117494353B (en) * | 2024-01-02 | 2024-03-26 | 航天精工股份有限公司 | Design checking integration-based forward design method for fastening connection |
| CN117610384A (en) * | 2024-01-23 | 2024-02-27 | 航天精工股份有限公司 | Simulation analysis method of fastening connection system based on engineering actual distribution |
| CN117610384B (en) * | 2024-01-23 | 2024-05-14 | 航天精工股份有限公司 | Simulation analysis method of fastening connection system based on engineering actual distribution |
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