CN102799729B - Effective method for quickly eliminating residual stress of heterogeneous component - Google Patents
Effective method for quickly eliminating residual stress of heterogeneous component Download PDFInfo
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Abstract
The invention relates to an effective method for quickly eliminating residual stress of a heterogeneous component. The method comprises the following steps of: (1) establishing a heterogeneous component finite element model, wherein the establishing process comprises structure simplification, geometrical model establishment, material attribute definition and grid division; (2) carrying out staticstructural analysis on the heterogeneous component finite element model, and obtaining the residual stress and the distribution thereof of the heterogeneous component through applying screw pretightening force; (3) carrying out modal analysis and calculation on the heterogeneous component finite element model to obtain inherent frequencies of eight front steps of the heterogeneous component, and selecting a preset frequency from the inherent frequency as a vibration aging parameter; (4) carrying out harmonic analysis and calculation on the heterogeneous component finite element model to obtain a relation curve of the deformation amount and the frequency of the heterogeneous component, and determining a vibration amplitude value required during vibration aging through simulating a result; and (5) carrying out transient dynamic analysis on the heterogeneous component finite element model, and obtaining the distribution of the residual stress of the heterogeneous component after the vibration aging through the transient dynamic analysis and calculation.
Description
Technical field
The invention provides the heterogeneous member unrelieved stress of a kind of quick elimination effective ways, particularly relate to a kind of quick elimination based on finite element because the effective ways of the heterogeneous member unrelieved stress that the screw pretightning force causes belong to the finite element simulation technical field.
Background technology
Inertance elements such as accelerometer are to be installed on the heterogeneous member stage body by screw, in long-term storage and use, because the screw pretightning force is lax, cause heterogeneous element structure generation assembly deflections, thereby produce the alignment error angle, influence systematic parameter stability.Owing to the application of robot calculator and the new development of computing method, finite element method has been widely used in the engineering field as a strong numerical analysis tools in recent years.By existing technical literature retrieval based on finite element analysis is found, at the research of heterogeneous member, focus mostly in heterogeneous member integral body being carried out the dynamic design analysis or calculating research aspect such as heterogeneous member parameter drift method; Also focus mostly in research under hot conditions for screw, the pretightning force of screw self changes or the creep relaxation analysis; And also mainly be that method is carried out by experiment about the research of Relieving Residual Stress in Libration, and because the oscillating aging technological parameter is chosen fully by virtue of experience, lacking scientific basis, it has blindness.Therefore, the present invention is primarily aimed at these problems, method by the finite element simulation analysis, obtain the distribution situation of unrelieved stress behind the distribution situation of unrelieved stress in the heterogeneous member and the oscillating aging quantitatively, the heterogeneous member unrelieved stress of a kind of quick elimination effective ways are provided, and obtain the oscillating aging technological parameter by simulation result, thereby provide the data reference for the oscillating aging technological parameter.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, the heterogeneous member unrelieved stress of a kind of quick elimination effective ways are provided, it is based on the heterogeneous member overall simplification model of finite element and in conjunction with the emulation mode of static(al) structure analysis, model analysis, humorous response analysis and TRANSIENT DYNAMIC ANALYSIS, by heterogeneous member is carried out the oscillating aging analysis, to reach the purpose of homogenizing or reduction unrelieved stress, and determine the oscillating aging technological parameter, so that engineering test is used.
The present invention is based on following technical scheme realization, at first heterogeneous member stage body, accelerometer and screw in the heterogeneous member are carried out modeling and assembling, and assembling model imported in the finite element, obtained the finite element model of heterogeneous member assembly structure, carried out grid in conjunction with heterogeneous element structure dimensional characteristic and divide; Again heterogeneous member is applied the screw pretightning force, obtain residual stress distribution, and heterogeneous member is carried out the harmonious response analysis of model analysis, obtain its excited frequency and exciting amplitude; At last heterogeneous member is carried out the oscillating aging analysis, obtain the assembling residual stress distribution behind the oscillating aging.
The heterogeneous member unrelieved stress of a kind of quick elimination of the present invention effective ways, its step is as follows:
Step 1: set up heterogeneous member finite element model; Set up the model of heterogeneous member stage body, accelerometer and screw, carry out designs simplification, and the three is assembled into one, obtain heterogeneous member geometric model; Heterogeneous member geometric model is imported in the finite element software by the Parasolid input method, obtain heterogeneous member finite element model; Set up the material model storehouse, comprise the material properties of definition system of units and each parts of input; Implement different grid precision division methods at the different parts of heterogeneous member finite element model and carry out the finite element grid division;
Step 2: heterogeneous member finite element model is carried out the static(al) structure analysis, by heterogeneous member is applied the screw pretightning force, obtain unrelieved stress and distribution thereof that heterogeneous member produces under the pretightning force effect;
Step 3: heterogeneous member finite element model is carried out model analysis, calculate 8 rank natural frequencys before the heterogeneous member by model analysis, and therefrom choose suitable frequency as the oscillating aging parameter;
Step 4: heterogeneous member finite element model is carried out humorous response analysis, calculate the relation curve of heterogeneous deformation of member amount and frequency by humorous response analysis, and required amplitude amplitude when determining oscillating aging by simulation result;
Step 5: heterogeneous member finite element model is carried out TRANSIENT DYNAMIC ANALYSIS, calculate the distribution of the heterogeneous member unrelieved stress behind the oscillating aging by TRANSIENT DYNAMIC ANALYSIS;
Wherein, at the heterogeneous member finite element model of setting up described in the step 1, the step of its specific practice is as follows:
A) set up model: set up the model that heterogeneous member stage body, acceleration are taken into account screw, specific practice is to be that heterogeneous member stage body, acceleration are taken into account screw and set up geometric model according to its physical size at pretightning force to the big parts of heterogeneous component stability influence, and the little parts of heterogeneous component stability influence are ignored;
B) model simplification: for fear of the bigger error of calculation, kept the hole on the accelerometer installed surface, lead angle etc. on the heterogeneous member stage body; Ignore the accelerometer inner structure, only set up accelerometer shell model, i.e. upper casing, lower casing and ring flange; Ignore the influence of screw thread on word road in the middle of the round end on the screw and the double-screw bolt;
C) structure assembling: the heterogeneous member stage body model, accelerometer model and the screw model three that utilize UG software to build up are assembled together;
D) model imports: by the Parasolid input method the heterogeneous member geometric model after assembling among the UG is imported in the ANSYS Workbench software, obtain heterogeneous member finite element model.
Wherein, setting up the material model storehouse described in the step 1, its concrete steps are as follows:
A) definition system of units: because the accuracy requirement of heterogeneous member finite element simulation is higher, so self-defined system of units on the basis of International System of Units: millimeter (mm), MPa (MPa), kilogram (kg), second (s), milliampere (mA) and millivolt (mV), all part dimensions, material properties and load value all convert by this system of units and obtain afterwards;
B) import the material properties of each parts: each the component materials attribute that need use in conjunction with simulation type input emulation, heterogeneous construction material attribute mainly contains aluminium alloy, stainless steel and low-carbon alloy steel, and it is analyzed needed material properties and comprises density, elastic modulus and Poisson ratio;
C) distributive property: the material model storehouse that combination is set up is to each parts assignment of heterogeneous member, make each component materials of heterogeneous member consistent with real material, specific practice be material properties in conjunction with heterogeneous member stage body, accelerometer and screw in finite element software to heterogeneous member parts assignment, make the material of heterogeneous all parts of member consistent with real material.
Wherein, divide at the grid described in the step 1, its concrete steps are as follows:
Be screw and accelerometer to the parts and the residual stress concentrations position that influence residual stress distribution, increase mesh-density, improve computational accuracy, carry out mesh refinement by overall size Control; Heterogeneous member stage body complex structure, and irregular, use automatic mesh to divide to it, it can be according to the automatic definition unit of the shape and size of structure and number of nodes.
Wherein, described in the step 2 heterogeneous member finite element model is being carried out the static(al) structure analysis, its concrete steps are as follows:
In conjunction with finite element static(al) structure analysis flow process heterogeneous member is carried out finite element simulation, according to existing heterogeneous member technological parameter, heterogeneous member is applied screw pretightning force and constraint, obtain unrelieved stress and distribution thereof that heterogeneous member produces under the pretightning force effect.
Wherein, described in the step 3 heterogeneous member finite element model is being carried out model analysis, its concrete steps are as follows:
In conjunction with the finite element modal analysis flow process heterogeneous member is carried out finite element simulation, adopt complete method to calculate the preceding 8 rank natural frequencys of heterogeneous member, and obtain the big ultimate principle of vibratory output according to when resonance, therefrom choose suitable frequency as the oscillating aging parameter.
Wherein, described in the step 4 heterogeneous member finite element model is being carried out humorous response analysis, its concrete steps are as follows:
In conjunction with the humorous response analysis flow process of finite element heterogeneous member is carried out finite element simulation, by heterogeneous member is applied different displacement amplitude, obtain the relation curve of heterogeneous deformation of member amount and frequency, and required amplitude amplitude when determining oscillating aging according to curve.
Wherein, described in the step 5 heterogeneous member finite element model is being carried out TRANSIENT DYNAMIC ANALYSIS, its concrete steps are as follows:
In conjunction with finite element TRANSIENT DYNAMIC ANALYSIS flow process heterogeneous member is carried out finite element simulation, this TRANSIENT DYNAMIC ANALYSIS refers to obtain under the condition of residual stress distribution in the static(al) structure analysis, it is TRANSIENT DYNAMIC ANALYSIS that the oscillating aging parameter that provides according to emulation is carried out the oscillating aging analysis to heterogeneous member, obtains heterogeneous member residual stress distribution behind the oscillating aging.
By heterogeneous member is carried out the structure TRANSIENT DYNAMIC ANALYSIS, finally can obtain the distribution situation of unrelieved stress behind the distribution situation of unrelieved stress in the heterogeneous member and the oscillating aging, the heterogeneous member unrelieved stress of a kind of quick elimination effective ways are provided, and obtain the oscillating aging technological parameter by simulation result, thereby provide the data reference for the oscillating aging technological parameter.
The heterogeneous member unrelieved stress of a kind of quick elimination of the present invention effective ways, its advantage is:
1. adopt ANSYS Workbench numerical simulation technology and finite element Parametric Design Language (APDL) to combine.To humorous response analysis, all adopt ANSYS Workbench finite element software to realize from material depot foundation, geometric model foundation, grid division, static(al) structure analysis, model analysis, it is succinctly convenient.When TRANSIENT DYNAMIC ANALYSIS, adopt finite element Parametric Design Language (APDL) to write loop code and carry out iterative process, greatly reduced workload.
2. by heterogeneous member is applied the screw pretightning force, can obtain under the pretightning force effect, the distribution situation of heterogeneous member unrelieved stress is thought contrast with the actual conditions of heterogeneous member residual stress distribution, has proved that the screw pretightning force applies the rationality of mode.
3. can study heterogeneous member residual stress distribution situation behind the oscillating aging by simulation result.Because the heterogeneous component model of setting up has been taken all factors into consideration its each part dimension and material properties, the finite element simulation emphasis has been determined the oscillating aging technological parameter simultaneously, therefore can study heterogeneous member residual stress distribution situation behind the oscillating aging by simulation result.
Description of drawings
Fig. 1 is the inventive method process flow diagram.
Fig. 2 is the heterogeneous deformation of member amount of the embodiment of the invention and the graph of a relation of frequency.
Fig. 3 is residual stress distribution figure behind the heterogeneous member oscillating aging of the embodiment of the invention.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Following examples are to implement according to flow process as shown in Figure 1, mainly comprise setting up finite element model, static(al) structure analysis, model analysis, humorous corresponding analysis and TRANSIENT DYNAMIC ANALYSIS.Heterogeneous component assembly is made up of stage body, two dynamically tuned gyro, DTGs, three quartz flexible accelerometers, screw, ring flange, bearing, pedestal etc.Because present embodiment is mainly studied near the variation of the screw pretightning force accelerometer on the heterogeneous member, therefore only set up the solid model of heterogeneous member stage body, accelerometer and screw.
The heterogeneous member unrelieved stress of a kind of quick elimination of the present invention effective ways, as shown in Figure 1, its step is as follows:
Step 1: set up heterogeneous member finite element model, mainly comprise:
1, sets up heterogeneous member finite element model.
At first, set up model.Set up heterogeneous member stage body, acceleration and take into account the model of screw, specific practice is to be that heterogeneous member stage body, acceleration are taken into account screw and carried out modeling at pretightning force to the big parts of heterogeneous component stability influence, and the little parts of heterogeneous component stability influence are ignored.
Secondly, model simplification.For fear of the bigger error of calculation, the hole on the accelerometer installed surface, lead angle etc. on the heterogeneous member stage body have been kept; Ignore the accelerometer inner structure, only set up accelerometer shell model, i.e. upper casing, lower casing and ring flange; Ignore the influence of screw thread on word road in the middle of the round end on the screw and the double-screw bolt.
Again, structure assembling.The heterogeneous member stage body model, accelerometer model and the screw model three that utilize UG software to build up are assembled together.
At last, model imports.By the Parasolid input method the heterogeneous member solid model after assembling among the UG is imported in the ANSYS Workbench software, obtain heterogeneous member finite element model.
2, set up the material model storehouse.
At first, definition system of units.Because the accuracy requirement of heterogeneous member finite element simulation is higher, so self-defined system of units on the basis of International System of Units: millimeter (mm), MPa (MPa), kilogram (kg), second (s), milliampere (mA) and millivolt (mV), all part dimensions, material properties and load value all convert by this system of units and obtain afterwards.
Secondly, import the material properties of each parts.In conjunction with each component materials attribute that simulation type input emulation need be used, heterogeneous construction material attribute mainly contains aluminium alloy, stainless steel and low-carbon alloy steel, and it is analyzed needed material properties and comprises density, elastic modulus and Poisson ratio, and is as shown in table 1.
Each component materials attribute of the heterogeneous member of table 1
At last, distributive property.To each parts assignment of heterogeneous member, make each component materials of heterogeneous member consistent with real material in conjunction with the material model storehouse of setting up.The material properties value of concrete each parts is seen upward shown in the tabulation 1.
3, grid is divided.
Mainly be heterogeneous member geometric model to be carried out grid divide, mesh-density will be taken into account the requirement of calculated amount and computational accuracy, implements different grid precision division methods at the different parts of heterogeneous member geometric model and carries out the finite element grid division.Be screw and accelerometer to the parts and the residual stress concentrations position that influence residual stress distribution, increase mesh-density, improve computational accuracy, carry out mesh refinement by overall size Control; Heterogeneous member stage body complex structure, and irregular, use automatic mesh to divide to it, it can be according to the automatic definition unit of the shape and size of structure and number of nodes.Such processing has guaranteed precision and the convergence calculated on the one hand, has guaranteed the smooth transmission of power between the unit on the other hand again.Heterogeneous member finite element model behind the division grid has 63461 unit, 101619 nodes.
Step 2: heterogeneous member is imposed restriction and load, carry out the static(al) structure analysis.Mainly comprise:
1, imposes restriction and load.
Accelerometer is to be installed on the heterogeneous member stage body by screw, and then in the mounting screw process, heterogeneous member stage body will be under pressure, and is pressure with the equivalence of screw pretightning force then.The i.e. pressure of the 200Mpa that nine screws are applied.To applying displacement constraint on the heterogeneous member bottom faces, make its bottom restrained at x, y and z direction.
2, static(al) structure analysis.
In conjunction with finite element static(al) structure analysis flow process heterogeneous member is carried out simulation analysis; This static(al) structure analysis refers to heterogeneous member is being applied under the condition of screw pretightning force, provides residual stress distribution situation and the heterogeneous deformation of members amount of heterogeneous member.
Step 3: model analysis.Heterogeneous member finite element model is carried out model analysis, obtain 8 rank natural frequencys before the heterogeneous member by simulation calculation, and therefrom to choose suitable frequency be the oscillating aging parameter.Adopt complete method to calculate the natural frequency of heterogeneous member, the 8 rank natural frequencys that obtain heterogeneous member are as shown in table 2.
Table 2 model analysis
| Exponent number | Frequency | Exponent number | Frequency |
| 1 | 2870.2 | 5 | 8413.5 |
| 2 | 3700.6 | 6 | 8840.7 |
| 3 | 7848.2 | 7 | 10167 |
| 4 | 8112.6 | 8 | 11504 |
When heterogeneous member was carried out the oscillating aging analysis, in order to obtain bigger vibratory output, the general resonance that adopts was handled.Excited frequency generally is chosen for the corresponding frequency of 1/3-2/3 of natural frequency peak value.
Step 4: humorous response analysis.In oscillating aging simulation analysis process, excitation amplitude is unusual important parameters, if excitation amplitude is too little on the one hand, then can not eliminate unrelieved stress effectively, on the other hand, if excitation amplitude is too big, then can reduces the fatigue lifetime of workpiece or make workpiece damage.Therefore, estimate that in advance excitation amplitude is necessary, namely determine excitation amplitude by humorous response analysis.
Have the workpiece of unrelieved stress in the oscillating aging process, the most tangible characteristics are that parameter will change, and the regular variation of intercropping at any time, so come homogenizing or reduce the assembling unrelieved stress by applying sinusoidal excitation.The expression formula of sinusoidal excitation is as follows:
d(t)＝D·sin2πft
Wherein: d (t) is the displacement under the time t;
D is displacement amplitude;
F is frequency;
In this formula, the excited frequency that frequency f namely obtains by model analysis.Displacement amplitude D determines by humorous response analysis.In conjunction with the humorous response analysis flow process of finite element heterogeneous member is carried out emulation, by humorous response analysis, heterogeneous member is applied the relation curve that displacement amplitude can obtain deflection and frequency, know again under the effect of screw pretightning force, heterogeneous deformation of members amount, when both approximately equals, namely Ci Shi displacement amplitude is excitation amplitude.
When excitation amplitude was got 0.004mm, Fig. 2 was the relation of heterogeneous deformation of member amount and frequency under the humorous response analysis.As can be seen from Figure 2, under seven rank natural frequency 10167Hz, deflection is 0.0129mm.By the static(al) structure analysis as can be known, heterogeneous deformation of members amount is 0.0167mm under the effect of screw pretightning force.Both deflections are approximate, so the approximate 0.004mm that is chosen for of excitation amplitude.According to step 3 as can be known, when frequency was 10000Hz, its peak value 0.0087mm was approximately 2/3 of natural frequency peak value, so excited frequency is elected 10KHz as.
Step 5: TRANSIENT DYNAMIC ANALYSIS (being the oscillating aging analysis).In conjunction with finite element TRANSIENT DYNAMIC ANALYSIS flow process heterogeneous member is carried out simulation analysis; This TRANSIENT DYNAMIC ANALYSIS adopts the simulation result of the heterogeneous member unrelieved stress in front as the initial residual stress of the finite element analysis model of oscillating aging numerical simulation, by applying sinusoidal excitation analog vibration ag(e)ing process, obtain the size of heterogeneous member unrelieved stress behind the oscillating aging and distribute.
When applying sinusoidal excitation for the heterogeneous member finite element model that contains unrelieved stress, need to adopt APDL language compilation program, part A PDL order is as follows:
Fig. 3 is heterogeneous member unrelieved stress and the change curve of time behind the oscillating aging, and as can be seen from Figure 3, behind the oscillating aging, heterogeneous member unrelieved stress obviously reduces.
The present invention has set up and has eliminated heterogeneous member unrelieved stress effective ways.Utilize this method, homogenizing and reduce heterogeneous member unrelieved stress fast and effectively, thus make heterogeneous member to reach stable fast.The present invention also provides the data reference for the oscillating aging selection of process parameters, provides foundation for further heterogeneous member being carried out the design of oscillating aging simulation optimization.
Claims (8)
1. eliminate heterogeneous member unrelieved stress method fast for one kind, it is characterized in that: this method step is as follows:
Step 1: set up heterogeneous member finite element model, namely set up the model of stage body, accelerometer and three parts of screw in the heterogeneous member at first respectively, and carry out designs simplification respectively, then the three is assembled into one, obtain heterogeneous member geometric model; Then heterogeneous member geometric model is imported in the finite element software by the Parasolid input method, obtain heterogeneous member finite element model; Set up the material model storehouse, comprise the material properties of definition system of units and each parts of input; Implement different grid precision division methods at the different parts of heterogeneous member finite element model and carry out the finite element grid division;
Step 2: heterogeneous member finite element model is carried out the static(al) structure analysis, by heterogeneous member is applied the screw pretightning force, obtain unrelieved stress and distribution thereof that heterogeneous member produces under the pretightning force effect;
Step 3: heterogeneous member finite element model is carried out model analysis, calculate 8 rank natural frequencys before the heterogeneous member by model analysis, and therefrom choose suitable frequency as the oscillating aging parameter;
Step 4: heterogeneous member finite element model is carried out humorous response analysis, calculate the relation curve of heterogeneous deformation of member amount and frequency by humorous response analysis, and required amplitude amplitude when determining oscillating aging by simulation result;
Step 5: heterogeneous member finite element model is carried out TRANSIENT DYNAMIC ANALYSIS, calculate the distribution of the heterogeneous member unrelieved stress behind the oscillating aging by TRANSIENT DYNAMIC ANALYSIS.
2. the heterogeneous member unrelieved stress of a kind of quick elimination according to claim 1 method, it is characterized in that: at the heterogeneous member finite element model of setting up described in the step 1, the step of its specific practice is as follows:
A) set up the model of parts: set up the model that stage body, acceleration in the heterogeneous member are taken into account three parts of screw, specific practice is to be that heterogeneous member stage body, acceleration are taken into account screw and carried out modeling respectively at pretightning force to the big parts of heterogeneous component stability influence, and the little parts of heterogeneous component stability influence are ignored;
B) model simplification: for fear of the bigger error of calculation, kept hole, lead angle on the accelerometer installed surface on the heterogeneous member stage body; Ignore the accelerometer inner structure, only set up accelerometer shell model, i.e. upper casing, lower casing and ring flange; Ignore the influence of screw thread on word road in the middle of the round end on the screw and the double-screw bolt;
C) structure assembling: the heterogeneous member stage body model, accelerometer model and the screw model three that utilize UG software to build up are assembled together;
D) model imports: by the Parasolid input method the heterogeneous member geometric model after assembling among the UG is imported in the ANSYS Workbench software, obtain heterogeneous member finite element model.
3. the heterogeneous member unrelieved stress of a kind of quick elimination according to claim 1 method is characterized in that: setting up the material model storehouse described in the step 1, its concrete steps are as follows:
A) definition system of units: because heterogeneous member finite element simulation accuracy requirement height, so self-defined system of units on the basis of International System of Units: millimeter is that mm, MPa are that MPa, kilogram are kg, second to be that s, milliampere are that mA and millivolt are mV, and all part dimensions, material properties and load value all convert by this system of units and obtain afterwards;
B) import the material properties of each parts: each the component materials attribute that need use in conjunction with simulation type input emulation, heterogeneous construction material attribute mainly contains aluminium alloy, stainless steel and low-carbon alloy steel, and it is analyzed needed material properties and comprises density, elastic modulus and Poisson ratio;
C) distributive property: the material model storehouse that combination is set up is to each parts assignment of heterogeneous member, make each component materials of heterogeneous member consistent with real material, specific practice be material properties in conjunction with heterogeneous member stage body, accelerometer and screw in finite element software to heterogeneous member parts assignment, make the material of heterogeneous all parts of member consistent with real material.
4. the heterogeneous member unrelieved stress of a kind of quick elimination according to claim 1 method, it is characterized in that: divide at the grid described in the step 1, its specific practice is as follows: be screw and accelerometer to the parts and the residual stress concentrations position that influence residual stress distribution, increase mesh-density, improve computational accuracy, carry out mesh refinement by overall size Control; Heterogeneous member stage body complex structure, and irregular, use automatic mesh to divide to it, according to the automatic definition unit of the shape and size of structure and number of nodes.
5. the heterogeneous member unrelieved stress of a kind of quick elimination according to claim 1 method, it is characterized in that: described in the step 2 heterogeneous member finite element model is being carried out the static(al) structure analysis, its specific practice is as follows: in conjunction with finite element static(al) structure analysis flow process heterogeneous member is carried out finite element simulation, according to existing heterogeneous member technological parameter, heterogeneous member is applied screw pretightning force and constraint, obtain unrelieved stress and distribution thereof that heterogeneous member produces under the pretightning force effect.
6. the heterogeneous member unrelieved stress of a kind of quick elimination according to claim 1 method, it is characterized in that: described in the step 3 heterogeneous member finite element model is being carried out model analysis, its specific practice is as follows: in conjunction with the finite element modal analysis flow process heterogeneous member is carried out finite element simulation, adopt complete method to calculate the preceding 8 rank natural frequencys of heterogeneous member, and obtain the big ultimate principle of vibratory output according to when resonance, therefrom choose suitable frequency as the oscillating aging parameter.
7. the heterogeneous member unrelieved stress of a kind of quick elimination according to claim 1 method, it is characterized in that: described in the step 4 heterogeneous member finite element model is being carried out humorous response analysis, its specific practice is as follows: in conjunction with the humorous response analysis flow process of finite element heterogeneous member is carried out finite element simulation, by heterogeneous member is applied different displacement amplitude, obtain the relation curve of heterogeneous deformation of member amount and frequency, and required amplitude amplitude when determining oscillating aging according to curve.
8. the heterogeneous member unrelieved stress of a kind of quick elimination according to claim 1 method, it is characterized in that: described in the step 5 heterogeneous member finite element model is being carried out TRANSIENT DYNAMIC ANALYSIS, its specific practice is as follows: in conjunction with finite element TRANSIENT DYNAMIC ANALYSIS flow process heterogeneous member is carried out finite element simulation, this transient state dynamical simulation analysis refers to obtain under the condition of residual stress distribution in the static(al) structure analysis, it is TRANSIENT DYNAMIC ANALYSIS that the oscillating aging technological parameter that provides according to emulation carries out the oscillating aging analysis to heterogeneous member, obtains heterogeneous member residual stress distribution behind the oscillating aging.
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