CN106934112A - The detection method of automobile suspension system fastener strength - Google Patents
The detection method of automobile suspension system fastener strength Download PDFInfo
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- CN106934112A CN106934112A CN201710090828.4A CN201710090828A CN106934112A CN 106934112 A CN106934112 A CN 106934112A CN 201710090828 A CN201710090828 A CN 201710090828A CN 106934112 A CN106934112 A CN 106934112A
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- 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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Abstract
The present invention relates to a kind of detection method of automobile suspension system fastener strength, comprise the following steps：Obtain the load data of each tie point on the fastener and its parts that are carried；Respectively the fastener and the parts are carried out beam unit simulations and mesh generation to obtain FEM model；The load data is loaded in the FEM model and inertia release analysis is carried out to obtain the intensity data of the fastener.According to the detection method of automobile suspension system fastener strength proposed by the present invention, due to carrying out finite element modeling to fastener using beam unit simulations, correlation computations amount is substantially reduced on the basis of FEM model is simplified, so relative to using, traditional method for setting up hexahedron FEM model is highly efficient, and with good robustness.
Description
Technical field
The present invention relates to auto parts and components technical field of measurement and test, more particularly to a kind of automobile suspension system fastener strength
Detection method.
Background technology
In recent years, with the progressively aggravation that automobile industry is competed, client is also stepping up to the quality standard of automobile.
Wherein, used as one of most important system of vehicle, the power of its reliability often directly determines automobile to automobile chassis system
Unfailing performance, and for automobile chassis, bolt fastener is again one of most important of which connection member, if bolt fastener
Intensity be unsatisfactory for requiring and the problem that causes it to get loose or be broken during client's use, by directly to vehicle
Driving safety causes huge threat.
General, for automobile chassis, not only quantity is various for bolt fastener therein, and its annexation is also more multiple
It is miscellaneous.Such as wheel net and wheel hub generally carry out fastening effect using 6 or 8 bolt fasteners, and knuckle is generally used with towing arm
Three bolt fasteners are fastenedly connected, and automobile each bolt fastener in the process of moving discontinuity, because
This needs to be analyzed the intensity of each bolt fastener.
The now widely used bolt strength based on FEM model (carrying out hexahedron modeling to bolt fastener)
Detection method, its amount of calculation is very huge, and the method is very sensitive to mesh modeling quality, and its solving precision is in very great Cheng
Depending on the mesh modeling quality of bolt fastener on degree, so the not only inefficiency in actual application, and steadily and surely
Property is not high.
The content of the invention
Based on this, the invention aims to solve it is existing intensive analysis is carried out to fastener when there is inefficiency
And robustness problem not high, checking analysis is carried out with the intensity data relatively efficiently to fastener.
The present invention proposes a kind of detection method of automobile suspension system fastener strength, including：
Obtain the load data of each tie point on the fastener and its parts that are carried；
Beam unit simulations and mesh generation are carried out to the fastener and the parts respectively limited to obtain
Meta-model；
The load data is loaded in the FEM model and inertia release analysis is carried out to obtain the fastener
Intensity data.
According to the detection method of automobile suspension system fastener strength proposed by the present invention, due to using beam unit simulations
Finite element modeling is carried out to fastener, correlation computations amount is substantially reduced on the basis of FEM model is simplified, so relatively
In using, traditional method for setting up hexahedron FEM model is highly efficient, and with good robustness.The automobile hanging
The detection method of system fastener strength can effectively prevent automobile suspension system fastener get loose in use or
The problem of person's fracture, is significant to improving product reliability, shortening product development cycle and reducing real train test cost.
In addition, the detection method of the automobile suspension system fastener strength in the above embodiment of the present invention, can be with
With following additional technical characteristic：
Further, in one embodiment of the invention, the parts for obtaining the fastener and its being carried
On each tie point load data the step of specifically include：
According to its structural parameters multi-body dynamics modeling type is carried out to the automobile suspension system and it is demarcated；
The institute of the described each tie point on the fastener and the parts is calculated according to the multi-body Dynamics Model
State load data.
Further, in one embodiment of the invention, it is described to calculate described tight according to the multi-body Dynamics Model
The step of load data of the described each tie point on firmware and the parts, specifically includes：
Tire ground connection point load of the automobile under different operating modes is loaded in the multi-body Dynamics Model；
The load of each tie point on fastener and the parts according to the tire earth point LOAD FOR
Lotus data.
Further, in one embodiment of the invention, the intensity data includes the maximum axial of the fastener
Power and maximum shear stress, wherein loading the load data in the FEM model and carrying out inertia release analysis to obtain
To after the step of the intensity data of the fastener, methods described also includes：
Compare the maximum axial force and whether the maximum shear stress is respectively less than the maximum pretightning force of the fastener
Half；
If the maximum axial force and the maximum shear stress are respectively less than the half of the maximum pretightning force, it is determined that institute
State fastener and meet intensity requirement.
Further, in one embodiment of the invention, wherein loading the charge number in the FEM model
According to and carry out inertia release analysis with the intensity data for obtaining the fastener the step of after, methods described also includes：
Judge whether the maximum shear stress is less than the sliding limiting value of the fastener, wherein the sliding limiting value is
0.15 times of the maximum pretightning force；
If, it is determined that the fastener does not slide.
Further, in one embodiment of the invention, described respectively to the fastener and the parts
In the step of beam unit simulations and mesh generation are carried out to obtain FEM model；
The diameter of the beam units and the equal diameters of the fastener, adopt between the fastener and the parts
It is rigidly connected with the mode of rb2 units.
Further, in one embodiment of the invention, described respectively to the fastener and the parts
In the step of beam unit simulations and mesh generation are carried out to obtain FEM model；
It is 3-5mm, warpage to carry out the size of mesh opening corresponding to the mesh generation<10 °, Jacobian matrix characteristic value>
0.7th, grid length-width ratio<5th, volume mesh quality slump>0.35.
Further, in one embodiment of the invention, the structural parameters are the hard spot of the automobile suspension system
Positional information, part barycenter information, part quality inertia information, bushing rigidity information, damper parameter information and spring are firm
One or more in degree information.
Further, in one embodiment of the invention, the different operating modes are upper jump, cross hole, brake, accelerating, turning
One or more in curved or brakeing during cornereing.
Further, in one embodiment of the invention, the modeling software for setting up the FEM model is
Any one in Hypermesh, ANSYS, Patran/Nastran or Abaqus.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of automobile suspension system fastener strength detection method in first embodiment of the invention；
Fig. 2 is the schematic flow sheet of automobile suspension system fastener strength detection method in second embodiment of the invention；
Fig. 3 is the schematic flow sheet of automobile suspension system fastener strength detection method in third embodiment of the invention.
Specific embodiment
For the ease of understanding the present invention, the present invention is described more fully below with reference to relevant drawings.In accompanying drawing
Give first-selected embodiment of the invention.But, the present invention can be realized in many different forms, however it is not limited to this paper institutes
The embodiment of description.On the contrary, the purpose that these embodiments are provided be make to the disclosure more it is thorough comprehensively.
Unless otherwise defined, all of technologies and scientific terms used here by the article with belong to technical field of the invention
The implication that technical staff is generally understood that is identical.The term for being used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein " and/or " include one or more phases
The arbitrary and all of combination of the Listed Items of pass.
Fig. 1 is referred to, for the automobile suspension system fastener strength detection method in first embodiment of the invention, at least
Comprise the following steps：
The load data of each tie point on S101, the acquisition fastener and its parts for being carried.Specifically,
In the present embodiment, the automobile suspension system is automobile chassis, and the fastener is usually bolt fastener.For automobile bottom
For disk, it includes many parts, and these parts are mainly and are attached by bushing and bolt.In this implementation
In example, the tie point refers to the position connected with bushing between parts, and the load at the position can be with many body power
Learn what model was easily calculated, then calculate to obtain Axial stress in bolt and shearing force by FEM model again.This
Outward, the mini system that bolted several parts are constituted is we term it small assembly.
Above-mentioned tie point must be first obtained when in the present invention, due to the intensity data for being calculated the bolt fastener
The load data at place.Specifically, in the present embodiment, the method for obtaining the load data at above-mentioned tie point has two kinds：It is a kind of
It is that the load data at correspondence tie point is directly measured by the method surveyed；It is another then be first based on automobile chassis correlation
Structural parameters set up multi-body Dynamics Model, then survey out tire ground connection point load of the automobile under different road conditions,
The tire ground connection point load is loaded in the multi-body Dynamics Model asks calculation to obtain the load data at correspondence tie point.
This is pointed out that because the method for second acquisition tie point load data is that the tire earth point obtained based on actual measurement is carried
Then lotus asks what is obtained in multi-body Dynamics Model, is that a theory is asked and is worth, with it is above-mentioned the first directly actual measurement obtain
Tie point at load data there may be certain deviation, the specific amount of deflection all thinks symbol in the range of standard error
Close and require.
S102, carries out beam unit simulations and mesh generation to obtain to the fastener and the parts respectively
FEM model.
As described above, it is necessary to the bolt fastener and its institute after the load data at each tie point is obtained
The parts of carrying carry out finite element modeling.Specifically, unlike being modeled from traditional finite element hexahedron, in the present embodiment
In, finite element beam unit simulations are used to bolt fastener, wherein the diameter of the beam units is tight with the bolt
The equal diameters of firmware, are rigidly connected between the bolt fastener and the parts by the way of rb2 units.
This is pointed out that and the bolt fastener is carried out beam unit simulations set up hexahedron model significantly relative to traditional
Amount of calculation is reduced, data-handling efficiency is effectively increased.
At the same time, FEM meshing is carried out to each parts being carried on the bolt fastener, wherein entering
Size of mesh opening corresponding to the row mesh generation is 3-5mm, warpage<10 °, Jacobian matrix characteristic value>0.7th, grid length and width
Than<5th, volume mesh quality slump>0.35, after mesh generation is carried out to parts, then the material of related components is entered
Row attribute definition.
S103, the load data is loaded in the FEM model and inertia release is carried out and analyzes described tight to obtain
The intensity data of firmware.
After FEM model is established to the bolt fastener and the parts, in the FEM model
The load data of the tie point of above-mentioned acquisition is loaded, then carrying out inertia release analysis can obtain the bolt fastening
The intensity data of part, and then determine whether bolt fastener meets the requirements by analyzing the intensity data.
Fig. 2 is referred to, for the automobile suspension system fastener strength detection method in second embodiment of the invention, including
Following steps：
S201, according to its structural parameters carries out multi-body dynamics modeling type and enters rower to it to the automobile suspension system
It is fixed.Likewise, in the present embodiment, the automobile suspension system is automobile chassis, the fastener is usually bolt fastening
Part.First, the structural parameters based on the automobile chassis set up a multi-body Dynamics Model, wherein the structural parameters include institute
State hard spot positional information, part barycenter information, part quality inertia information, bushing rigidity information, the damper ginseng of automobile chassis
Number information and spring rate information.After the multi-body Dynamics Model is established, in addition it is also necessary to which the model to being set up enters
Rower is determined, and the multi-body Dynamics Model is compared into demarcation with corresponding master pattern when being demarcated, if misfitted
Then need to carry out related amendment to the multi-body Dynamics Model currently set up.
S202, loads tire ground connection point load of the automobile under different operating modes in the multi-body Dynamics Model.
After multi-body Dynamics Model is established, due to be calculated bolt fastener and zero by the multi-body Dynamics Model
Load data on part at tie point, and the computing is carried out in the data based on tire ground connection point load, it is therefore desirable to
Actually measure tire earth point load data of the automobile under different operating modes.In this respect it is to be noted that in the present embodiment
Different road conditions including upper jump, cross hole, braking, accelerate, turn and brakeing during cornereing etc..
S203, the institute of each tie point on fastener and the parts according to the tire earth point LOAD FOR
State load data.After the data that actual measurement obtains tire ground connection point load of the automobile under different road conditions,
The tire ground connection point load is loaded in the multi-body Dynamics Model and the load data at each tie point is calculated.
S204, carries out beam unit simulations and mesh generation to obtain to the fastener and the parts respectively
FEM model.
As described above, it is necessary to the bolt fastener and its institute after the load data at each tie point is obtained
The parts of carrying carry out finite element modeling.Specifically, unlike being modeled from traditional finite element hexahedron, in the present embodiment
In, finite element beam unit simulations are used to bolt fastener, wherein the diameter of the beam units is tight with the bolt
The equal diameters of firmware, are rigidly connected between the bolt fastener and the parts by the way of rb2 units.
This is pointed out that and the bolt fastener is carried out beam unit simulations set up hexahedron model significantly relative to traditional
Amount of calculation is reduced, data-handling efficiency is effectively increased.
At the same time, FEM meshing is carried out to each parts being carried on the bolt fastener, wherein entering
Size of mesh opening corresponding to the row mesh generation is 3-5mm, warpage<10 °, Jacobian matrix characteristic value>0.7th, grid length and width
Than<5th, volume mesh quality slump>0.35, after mesh generation is carried out to parts, then the material of related components is entered
Row attribute definition.
S205, the load data is loaded in the FEM model and inertia release is carried out and analyzes described tight to obtain
The intensity data of firmware.
After FEM model is established to the bolt fastener and the parts, in the FEM model
The load data of the tie point of above-mentioned acquisition is loaded, then carrying out inertia release analysis can obtain the bolt fastening
The intensity data of part, and then determine whether bolt fastener meets the requirements by analyzing the intensity data.
The maximum whether S206, the relatively maximum axial force and the maximum shear stress are respectively less than the fastener is pre-
The half of clamp force.After the intensity data for being calculated the bolt fastener, the intensity data includes described
The maximum axial force and maximum shear stress of bolt fastener.Wherein, in order to ensure bolt fastener in actual use not by
Break, the maximum axial force of the bolt fastener is necessarily less than the half of its maximum pretightning force, at the same time, in order to ensure bolt
There is no shear fracture in fastener, it is tight that the maximum shear stress of the bolt fastener is also necessarily less than the bolt in actual use
The half of the maximum pretightning force of firmware, it is therefore desirable to while being compared to both intensity.
S207, if the maximum axial force and the maximum shear stress are respectively less than the half of the maximum pretightning force,
Determine that the fastener meets intensity requirement.When the maximum axial force and the maximum shear stress are respectively less than the maximum in advance
During the half of clamp force, then can determine that the bolt fastener meets the requirements.Herein it may also be noted that being fastened for bolt
For part, in actual use in addition to ensureing its tensile strength and shear strength, also to ensure that bolt fastener exists
Do not slid in actually used, specifically, in the present embodiment, it is ensured that the condition that the bolt fastener does not slide is
The maximum shear stress is less than the sliding limiting value of the bolt fastener, wherein the sliding limiting value is the maximum pretension
0.15 times of power.If the maximum shear stress of the bolt fastener is less than the sliding limiting value, can determine that the bolt is tight
Firmware will not slide in actual applications.
Fig. 3 is referred to, for the automobile suspension system fastener strength detection method in third embodiment of the invention, including
Following steps：
S301, obtains the load data of the described each tie point on the fastener and the parts.Likewise,
In the present embodiment, the automobile suspension system is still with automobile chassis, and the fastener as a example by bolt fastener still to be said
It is bright.As described above, the intensity data in order to calculate the bolt fastener according to FEM model, it is necessary first to obtain bolt tight
The load data of each exterior connection point of the parts that firmware is connected, in the present embodiment, the charge number at the tie point
According to directly being obtained by actual measurement.
S302, carries out beam unit simulations and mesh generation to obtain to the fastener and the parts respectively
FEM model.
, it is necessary to the bolt fastener and its carried zero after the load data at each tie point is obtained
Part carries out finite element modeling.Specifically, unlike being modeled from traditional finite element hexahedron, in the present embodiment, to bolt
Fastener uses finite element beam unit simulations, wherein the diameter of the diameter of the beam units and the bolt fastener
It is equal, it is rigidly connected by the way of rb2 units between the bolt fastener and the parts.Herein it may be noted that
, beam unit simulations are carried out to the bolt fastener and greatly reduce calculating relative to traditional hexahedron model of setting up
Amount, effectively increases data-handling efficiency.
At the same time, FEM meshing is carried out to each parts being carried on the bolt fastener, wherein entering
Size of mesh opening corresponding to the row mesh generation is 3-5mm, warpage<10 °, Jacobian matrix characteristic value>0.7th, grid length and width
Than<5th, volume mesh quality slump>0.35, after mesh generation is carried out to parts, then the material of related components is entered
Row attribute definition.
S303, the load data is loaded in the FEM model and inertia release is carried out and analyzes described tight to obtain
The intensity data of firmware.
After FEM model is established to the bolt fastener and the parts, in the FEM model
The load data of the tie point of above-mentioned acquisition is loaded, then carrying out inertia release analysis can obtain the bolt fastening
The intensity data of part, and then determine whether bolt fastener meets the requirements by analyzing the intensity data.
The maximum whether S304, the relatively maximum axial force and the maximum shear stress are respectively less than the fastener is pre-
The half of clamp force.After the intensity data for being calculated the bolt fastener, the intensity data includes described
The maximum axial force and maximum shear stress of bolt fastener.Wherein, in order to ensure bolt fastener in actual use not by
Break and do not shear, the maximum axial force and maximum shear stress of the bolt fastener are necessarily less than the maximum pretension
The half of power, therefore first have to judge between the maximum axial force and the maximum shear stress and the maximum pretightning force
Relation.
S305, if the maximum axial force and the maximum shear stress are respectively less than the half of the maximum pretightning force,
Determine that the fastener meets intensity requirement.When the maximum axial force is less than pretightning force and maximum shear stress is less than the shearing limit
During value, then can determine that the bolt fastener meets the requirements.Herein it may also be noted that for bolt fastener,
In actual use in addition to ensureing its tensile strength and shear strength, also to ensure bolt fastener actually used
In do not slide, specifically, in the present embodiment, it is ensured that the condition that the bolt fastener does not slide is maximum shear
Power is less than the sliding limiting value of the bolt fastener, wherein the sliding limiting value is 0.15 times of the pretightning force.If institute
The maximum shear stress of bolt fastener is stated less than the sliding limiting value, then can determine the bolt fastener in actual applications
Will not slide.
At the same time, in the various embodiments of the invention, can be for setting up the modeling software of FEM model
Any one in Hypermesh, ANSYS, Patran/Nastran or Abaqus.
According to the detection method of automobile suspension system fastener strength proposed by the present invention, due to using beam unit simulations
Finite element modeling is carried out to bolt fastener, traditional method for setting up hexahedron FEM model is more high relative to using
Effect, and with good robustness.The detection method of the automobile suspension system fastener strength can effectively prevent automobile hanging
The problem that system fastener gets loose or is broken in use, to improving product reliability, shortening product development week
Phase and reduction real train test cost are significant.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of detection method of automobile suspension system fastener strength, it is characterised in that including：
Obtain the load data of each tie point on the fastener and its parts that are carried；
Respectively the fastener and the parts are carried out beam unit simulations and mesh generation to obtain finite element mould
Type；
The load data is loaded in the FEM model and inertia release analysis is carried out to obtain the strong of the fastener
Degrees of data.
2. the detection method of automobile suspension system fastener strength according to claim 1, it is characterised in that the acquisition
The step of load data of each tie point on the fastener and its parts for being carried, specifically includes：
According to its structural parameters multi-body dynamics modeling type is carried out to the automobile suspension system and it is demarcated；
The load of the described each tie point on the fastener and the parts is calculated according to the multi-body Dynamics Model
Lotus data.
3. the detection method of automobile suspension system fastener strength according to claim 2, it is characterised in that the basis
The multi-body Dynamics Model calculates the load data of the described each tie point on the fastener and the parts
Step is specifically included：
Tire ground connection point load of the automobile under different operating modes is loaded in the multi-body Dynamics Model；
The charge number of each tie point on fastener and the parts according to the tire earth point LOAD FOR
According to.
4. the detection method of automobile suspension system fastener strength according to claim 1, it is characterised in that the intensity
Data include the maximum axial force and maximum shear stress of the fastener, wherein loading the load in the FEM model
Lotus data and carry out inertia release analysis with the intensity data for obtaining the fastener the step of after, methods described also includes：
Compare whether the maximum axial force and the maximum shear stress are respectively less than the maximum pretightning force of the fastener one
Half；
If the maximum axial force and the maximum shear stress are respectively less than the half of the maximum pretightning force, it is determined that described tight
Firmware meets intensity requirement.
5. the detection method of automobile suspension system fastener strength according to claim 4, it is characterised in that wherein in institute
State and load the load data in FEM model and carry out inertia release analysis to obtain the intensity data of the fastener
After step, methods described also includes：
Judge whether the maximum shear stress is less than the sliding limiting value of the fastener, wherein the sliding limiting value is described
0.15 times of maximum pretightning force；
If, it is determined that the fastener does not slide.
6. the detection method of automobile suspension system fastener strength according to claim 1, it is characterised in that at described point
It is other that the fastener and the parts are carried out beam unit simulations and mesh generation to obtain the step of FEM model
In rapid；
The diameter of the beam units and the equal diameters of the fastener, use between the fastener and the parts
The mode of rb2 units is rigidly connected.
7. the detection method of automobile suspension system fastener strength according to claim 1, it is characterised in that at described point
It is other that the fastener and the parts are carried out beam unit simulations and mesh generation to obtain the step of FEM model
In rapid；
It is 3-5mm, warpage to carry out the size of mesh opening corresponding to the mesh generation<10 °, Jacobian matrix characteristic value>0.7th, net
Lattice length-width ratio<5th, volume mesh quality slump>0.35.
8. the detection method of automobile suspension system fastener strength according to claim 2, it is characterised in that the structure
Parameter is the hard spot positional information of the automobile suspension system, part barycenter information, part quality inertia information, bushing rigidity letter
One or more in breath, damper parameter information and spring rate information.
9. the detection method of automobile suspension system fastener strength according to claim 3, it is characterised in that the difference
Operating mode be upper jump, cross hole, braking, accelerate, turn or brakeing during cornereing in one or more.
10. the detection method of automobile suspension system fastener strength according to claim 1, it is characterised in that set up institute
It is any one in Hypermesh, ANSYS, Patran/Nastran or Abaqus to state the modeling software of FEM model.
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| CN109033726A (en) * | 2018-09-19 | 2018-12-18 | 江铃汽车股份有限公司 | The durable analysis method of intensity and rack of chassis suspension based on FInite Element |
| CN110059404A (en) * | 2019-04-16 | 2019-07-26 | 江铃汽车股份有限公司 | A kind of weld fatigue calculation method |
| CN112084579A (en) * | 2020-08-31 | 2020-12-15 | 东风汽车集团有限公司 | Stress analysis method for vehicle fastener |
| CN113283038A (en) * | 2021-07-21 | 2021-08-20 | 江铃汽车股份有限公司 | Bolt safety coefficient checking simulation method |
| CN113408164A (en) * | 2021-06-03 | 2021-09-17 | 江铃汽车股份有限公司 | Leaf spring strength analysis method, leaf spring strength analysis system, readable storage medium and computer equipment |
| CN113435077A (en) * | 2021-05-24 | 2021-09-24 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining strength parameters in fastener connecting structure |
| CN113536635A (en) * | 2021-07-15 | 2021-10-22 | 中国第一汽车股份有限公司 | Analysis method for clamping rigidity of auxiliary frame bushing assembly structure |
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| CN109033726B (en) * | 2018-09-19 | 2022-11-29 | 江铃汽车股份有限公司 | Finite element method-based chassis suspension system strength and rack durability analysis method |
| CN110059404A (en) * | 2019-04-16 | 2019-07-26 | 江铃汽车股份有限公司 | A kind of weld fatigue calculation method |
| CN112084579A (en) * | 2020-08-31 | 2020-12-15 | 东风汽车集团有限公司 | Stress analysis method for vehicle fastener |
| CN113435077A (en) * | 2021-05-24 | 2021-09-24 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining strength parameters in fastener connecting structure |
| CN113435077B (en) * | 2021-05-24 | 2023-08-22 | 中国航空工业集团公司沈阳飞机设计研究所 | Method for determining strength parameters in fastener connecting structure |
| CN113408164A (en) * | 2021-06-03 | 2021-09-17 | 江铃汽车股份有限公司 | Leaf spring strength analysis method, leaf spring strength analysis system, readable storage medium and computer equipment |
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