CN108664725A - Automobile steering system optimization method and system - Google Patents
Automobile steering system optimization method and system Download PDFInfo
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- CN108664725A CN108664725A CN201810439312.0A CN201810439312A CN108664725A CN 108664725 A CN108664725 A CN 108664725A CN 201810439312 A CN201810439312 A CN 201810439312A CN 108664725 A CN108664725 A CN 108664725A
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- 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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Abstract
The invention discloses a kind of automobile steering system optimization method and systems,The method obtains the CAD model input data of steering first from Trimbody models,Then the finite element model of steering is established by finite-element preprocessing device,Model analysis is carried out again,Obtain modal analysis result,Then mould measurement is carried out to steering instance model,To obtain mode test result,By to modal analysis result and mode test result analyze mark,The maximum region of displacement in steering is analyzed according to CAE analysis cloud atlas,In the extracted region test point,And acceleration transfer function analysis is carried out to test point,So as to carry out structure optimization to steering according to the result of acceleration transfer function analysis,It can more reflect steering system vibration,Keep structure optimization effect more preferable,And this method can effectively be analyzed the structure of steering early period in product development,Avoid design defect,Reduce man power and material,Reduce development cost.
Description
Technical field
The present invention relates to automobile technical fields, more particularly to a kind of automobile steering system optimization method and system.
Background technology
As the rapid development of economy and auto industry and the living standard of the people are quickly improved, automobile is increasingly becoming
The trip walking-replacing tool of average family.
NVH (Noise, Vibration, Harshness, noise, vibration and sound vibration roughness) performance of automobile is current
The main performance index of automobile product is one of the factor that consumer must take into consideration when buying automobile.And steering is vapour
One important subsystem of vehicle vibration research, vibration when Excitation of Random Road Surface frequency and engine when running car work swash
It encourages frequency to be likely to couple with the natural mode of vibration frequency of steering and generate resonance, influences the comfort driven.
In the prior art, automobile steering system optimization needs to put into a large amount of man power and material, and cost is higher, and optimizes effect
Fruit is not ideal enough, cannot be improved very well to the structure of steering.
Invention content
For this purpose, an object of the present invention is to provide a kind of automobile steering system optimization methods, to solve the prior art
It is of high cost, the not ideal enough problem of effect of optimization.
According to automobile steering system optimization method provided by the invention, including：
The CAD model input data of steering is obtained from Trim body models；
By the CAD model input data import finite element front processor in, and in the finite-element preprocessing device into
Row mesh generation, to establish the finite element model of the steering；
The finite element model is imported in finite element analysis solver and carries out model analysis, to obtain model analysis knot
Fruit；
Mould measurement is carried out to steering instance model, to obtain mode test result；
The modal analysis result and the mode test result analyze mark；
The maximum region of displacement in the steering is analyzed according to CAE analysis cloud atlas, in the extracted region
Test point, and acceleration transfer function analysis is carried out to test point；
Structure optimization is carried out to the steering according to the result of the acceleration transfer function analysis, is added until meeting
Until speed transmission function requires.
According to automobile steering system optimization method provided by the invention, steering system is obtained from Trim body models first
Then the CAD model input data of system is established the finite element model of steering by finite-element preprocessing device, then carries out mode
Analysis obtains modal analysis result, then carries out mould measurement to steering instance model, to obtain mode test result,
By to modal analysis result and mode test result analyze mark, according to CAE analysis cloud atlas to displacement in steering
It measures maximum region to be analyzed, acceleration transfer function analysis is carried out in the extracted region test point, and to test point, to
Structure optimization can be carried out to steering according to the result of acceleration transfer function analysis, can more reflect shaking for steering
It is dynamic, keep structure optimization effect more preferable, and this method can effectively divide the structure of steering early period in product development
Analysis avoids design defect, reduces man power and material, reduces development cost.
In addition, according to the above-mentioned automobile steering system optimization method of the present invention, there can also be following additional technology special
Sign：
Further, the step of finite element model for establishing the steering includes：
Material properties and thickness are assigned to the unit grid pulled；
The steering is assembled, spot welding uses cweld unit simulations, weld seam to be simulated using rigid element.
Further, the modal analysis result includes the modal frequency data and mode formation number of the steering
According to.
Further, described the step of carrying out mould measurement to steering instance model, includes：
Modal test is carried out using the method for power hammer excitation to the steering instance model, each point response data is adopted
Modal frequency extraction is carried out with PloyMax, to obtain the modal frequency data and mode formation of the steering instance model
Data.
Further, described the step of carrying out acceleration transfer function analysis to test point, includes：
Acceleration transfer function analysis is carried out to test point using 111 solvers of SOL, and to the acceleration responsive of output
It is analyzed.
It is another object of the present invention to propose a kind of automobile steering system optimization system, to solve prior art cost
Height, the not ideal enough problem of effect of optimization.
According to automobile steering system optimization system provided by the invention, including：
Acquisition module, the CAD model input data for obtaining steering from Trim body models；
Module is established in importing, for importing the CAD model input data in finite element front processor, and is had described
Mesh generation is carried out in the first front processor of limit, to establish the finite element model of the steering；
Model analysis module carries out model analysis for importing the finite element model in finite element analysis solver,
To obtain modal analysis result；
Mould measurement module, for carrying out mould measurement to steering instance model, to obtain mode test result；
To marking analysis module, for the modal analysis result and the mode test result analyze mark；
Extraction and analysis module, for being carried out to the maximum region of displacement in the steering according to CAE analysis cloud atlas
Analysis carries out acceleration transfer function analysis in the extracted region test point, and to test point；
Optimization module, it is excellent for carrying out structure to the steering according to the result of the acceleration transfer function analysis
Change, until requirement until meeting acceleration transmission function.
According to automobile steering system optimization system provided by the invention, first by acquisition module from Trim body models
Then the middle CAD model input data for obtaining steering is turned by importing to establish mould finite-element preprocessing device in the block and establish
Model analysis is carried out to the finite element model of system, then by model analysis module, obtains modal analysis result, then mode is surveyed
Die trial block carries out mould measurement to steering instance model, to obtain mode test result, by marking analysis module to mould
State analysis result with mode test result analyze mark, and extraction and analysis module is according to CAE analysis cloud atlas in steering
The maximum region of displacement is analyzed, and acceleration transfer function analysis is carried out in the extracted region test point, and to test point,
So as to carry out structure optimization to steering according to the result of acceleration transfer function analysis, it can more reflect steering
Vibration, keeps structure optimization effect more preferable, and this method can carry out effectively the structure of steering early period in product development
Analysis avoids design defect, reduces man power and material, reduces development cost.
In addition, according to the above-mentioned automobile steering system optimization system of the present invention, there can also be following additional technology special
Sign：
Further, the importing is established module and is additionally operable to：
Material properties and thickness are assigned to the unit grid pulled；
The steering is assembled, spot welding uses cweld unit simulations, weld seam to be simulated using rigid element.
Further, the modal analysis result includes the modal frequency data and mode formation number of the steering
According to.
Further, the mould measurement module is specifically used for：
Modal test is carried out using the method for power hammer excitation to the steering instance model, each point response data is adopted
Modal frequency extraction is carried out with PloyMax, to obtain the modal frequency data and mode formation of the steering instance model
Data.
Further, the extraction and analysis module is additionally operable to：
Acceleration transfer function analysis is carried out to test point using 111 solvers of SOL, and to the acceleration responsive of output
It is analyzed.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obviously, or embodiment through the invention is recognized.
Description of the drawings
In description of the above-mentioned and/or additional aspect and advantage of the embodiment of the present invention from combination following accompanying drawings to embodiment
It will be apparent and be readily appreciated that, wherein：
Fig. 1 is the flow chart of automobile steering system optimization method according to a first embodiment of the present invention；
Fig. 2 is the structure diagram of automobile steering system optimization system according to a second embodiment of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, first embodiment of the invention proposes automobile steering system optimization method, include the following steps：
S101 obtains the CAD model input data of steering from Trim body models；
S102 imports the CAD model input data in finite element front processor, and in the finite-element preprocessing device
Middle carry out mesh generation, to establish the finite element model of the steering；
Wherein, the finite-element preprocessing device is HyperMesh, in the step, needs to assign the unit grid pulled
Material properties and thickness；Then the steering is assembled, spot welding uses cweld unit simulations, and weld seam is using rigidity
Unit simulation.
The finite element model is imported in finite element analysis solver and carries out model analysis by S103, to obtain mode point
Analyse result；
Wherein, the finite element analysis solver is for example specifically Nastran, and the modal analysis result includes described turns
To the modal frequency data and mode formation data of system.
S104 carries out mould measurement, to obtain mode test result to steering instance model；
Wherein, which specifically includes：Mode is carried out using the method for power hammer excitation to the steering instance model
Experiment carries out modal frequency extraction, to obtain the mould of the steering instance model to each point response data using PloyMax
State frequency data and mode formation data.
S105 to the modal analysis result and the mode test result analyze mark；
Wherein, the two modal frequency difference and Mode Shape degree of relevancy are mainly compared, it can be to simulation analysis knot
Modal frequency data and mode formation data in fruit respectively with the modal frequency data and mode in sample mode test result
Formation data compare and analyze, the error of the two such as all Kong ≤10%.If standard, return to step is not achieved in error
S103 re-starts model analysis.
S106 analyzes the maximum region of displacement in the steering according to CAE analysis cloud atlas, in the region
Test point is extracted, and acceleration transfer function analysis is carried out to test point；
Wherein, acceleration transfer function analysis is carried out to test point to specifically include：Using 111 solvers of SOL to test point
Acceleration transfer function analysis is carried out, and the acceleration responsive of output is analyzed.
S107 carries out structure optimization according to the result of the acceleration transfer function analysis to the steering, until
Until meeting the requirement of acceleration transmission function.
Wherein, if the structure after optimization cannot meet the requirement of acceleration transmission function, return to step S101 is re-started
Flow.
According to automobile steering system optimization method provided in this embodiment, obtains turn to from Trim body models first
Then the CAD model input data of system is established the finite element model of steering by finite-element preprocessing device, then carries out mould
State is analyzed, and modal analysis result is obtained, and then mould measurement is carried out to steering instance model, to obtain mould measurement knot
Fruit, by modal analysis result and mode test result analyze mark, according to CAE analysis cloud atlas to position in steering
The maximum region of shifting amount is analyzed, and acceleration transfer function analysis is carried out in the extracted region test point, and to test point, from
And structure optimization can be carried out to steering according to the result of acceleration transfer function analysis, it can more reflect shaking for steering
It is dynamic, keep structure optimization effect more preferable, and this method can effectively divide the structure of steering early period in product development
Analysis avoids design defect, reduces man power and material, reduces development cost.
Referring to Fig. 2, being based on same inventive concept, the automobile steering system optimization that the second embodiment of the present invention provides is
System, including：
Acquisition module 10, the CAD model input data for obtaining steering from Trim body models；
Module 20 is established in importing, for importing the CAD model input data in finite element front processor, and described
Mesh generation is carried out in finite-element preprocessing device, to establish the finite element model of the steering；
Model analysis module 30 carries out mode point for importing the finite element model in finite element analysis solver
Analysis, to obtain modal analysis result；
Mould measurement module 40, for carrying out mould measurement to steering instance model, to obtain mode test result；
To marking analysis module 50, for the modal analysis result and the mode test result analyze mark；
Extraction and analysis module 60, for according to CAE analysis cloud atlas to the maximum region of displacement in the steering into
Row analysis carries out acceleration transfer function analysis in the extracted region test point, and to test point；
Optimization module 70, for carrying out structure to the steering according to the result of the acceleration transfer function analysis
Optimization, until requirement until meeting acceleration transmission function.
In the present embodiment, the importing is established module 20 and is additionally operable to：
Material properties and thickness are assigned to the unit grid pulled；
The steering is assembled, spot welding uses cweld unit simulations, weld seam to be simulated using rigid element.
In the present embodiment, the modal analysis result includes the modal frequency data and mode formation number of the steering
According to.
In the present embodiment, the mould measurement module 40 is specifically used for：
Modal test is carried out using the method for power hammer excitation to the steering instance model, each point response data is adopted
Modal frequency extraction is carried out with PloyMax, to obtain the modal frequency data and mode formation of the steering instance model
Data.
In the present embodiment, the extraction and analysis module 60 is additionally operable to：
Acceleration transfer function analysis is carried out to test point using 111 solvers of SOL, and to the acceleration responsive of output
It is analyzed.
According to automobile steering system optimization system provided by the invention, first by acquisition module from Trim body models
Then the middle CAD model input data for obtaining steering is turned by importing to establish mould finite-element preprocessing device in the block and establish
Model analysis is carried out to the finite element model of system, then by model analysis module, obtains modal analysis result, then mode is surveyed
Die trial block carries out mould measurement to steering instance model, to obtain mode test result, by marking analysis module to mould
State analysis result with mode test result analyze mark, and extraction and analysis module is according to CAE analysis cloud atlas in steering
The maximum region of displacement is analyzed, and acceleration transfer function analysis is carried out in the extracted region test point, and to test point,
So as to carry out structure optimization to steering according to the result of acceleration transfer function analysis, it can more reflect steering
Vibration, keeps structure optimization effect more preferable, and this method can carry out effectively the structure of steering early period in product development
Analysis avoids design defect, reduces man power and material, reduces development cost.
It should be appreciated that each section of the present invention can be realized with hardware, software, firmware or combination thereof.Above-mentioned
In embodiment, software that multiple steps or method can in memory and by suitable instruction execution system be executed with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit application-specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The range of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of automobile steering system optimization method, which is characterized in that including：
The CAD model input data of steering is obtained from Trim body models；
The CAD model input data is imported in finite element front processor, and net is carried out in the finite-element preprocessing device
Lattice divide, to establish the finite element model of the steering；
The finite element model is imported in finite element analysis solver and carries out model analysis, to obtain modal analysis result；
Mould measurement is carried out to steering instance model, to obtain mode test result；
The modal analysis result and the mode test result analyze mark；
The maximum region of displacement in the steering is analyzed according to CAE analysis cloud atlas, is tested in the extracted region
Point, and acceleration transfer function analysis is carried out to test point；
Structure optimization is carried out to the steering according to the result of the acceleration transfer function analysis, until meeting acceleration
Until transmission function requires.
2. automobile steering system optimization method according to claim 1, which is characterized in that described to establish the steering
Finite element model the step of include：
Material properties and thickness are assigned to the unit grid pulled；
The steering is assembled, spot welding uses cweld unit simulations, weld seam to be simulated using rigid element.
3. automobile steering system optimization method according to claim 1, which is characterized in that the modal analysis result includes
The modal frequency data and mode formation data of the steering.
4. automobile steering system optimization method according to claim 1, which is characterized in that described to steering sample mould
Type carry out mould measurement the step of include：
Modal test is carried out using the method for power hammer excitation to the steering instance model, each point response data is used
PloyMax carries out modal frequency extraction, to obtain the modal frequency data and mode formation number of the steering instance model
According to.
5. automobile steering system optimization method according to claim 1, which is characterized in that described to accelerate to test point
Spend transfer function analysis the step of include：
Acceleration transfer function analysis is carried out to test point using 111 solvers of SOL, and the acceleration responsive of output is carried out
Analysis.
6. a kind of automobile steering system optimization system, which is characterized in that including：
Acquisition module, the CAD model input data for obtaining steering from Trim body models；
Module is established in importing, for importing the CAD model input data in finite element front processor, and in the finite element
Mesh generation is carried out in front processor, to establish the finite element model of the steering；
Model analysis module carries out model analysis, to obtain for importing the finite element model in finite element analysis solver
Obtain modal analysis result；
Mould measurement module, for carrying out mould measurement to steering instance model, to obtain mode test result；
To marking analysis module, for the modal analysis result and the mode test result analyze mark；
Extraction and analysis module, for being analyzed the maximum region of displacement in the steering according to CAE analysis cloud atlas,
Acceleration transfer function analysis is carried out in the extracted region test point, and to test point；
Optimization module, for carrying out structure optimization to the steering according to the result of the acceleration transfer function analysis,
Until requirement until meeting acceleration transmission function.
7. automobile steering system optimization system according to claim 6, which is characterized in that the importing is established module and also used
In：
Material properties and thickness are assigned to the unit grid pulled；
The steering is assembled, spot welding uses cweld unit simulations, weld seam to be simulated using rigid element.
8. automobile steering system optimization system according to claim 6, which is characterized in that the modal analysis result includes
The modal frequency data and mode formation data of the steering.
9. automobile steering system optimization system according to claim 6, which is characterized in that the mould measurement module is specific
For：
Modal test is carried out using the method for power hammer excitation to the steering instance model, each point response data is used
PloyMax carries out modal frequency extraction, to obtain the modal frequency data and mode formation number of the steering instance model
According to.
10. automobile steering system optimization system according to claim 6, which is characterized in that the extraction and analysis module is also
For：
Acceleration transfer function analysis is carried out to test point using 111 solvers of SOL, and the acceleration responsive of output is carried out
Analysis.
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| CN201810439312.0A CN108664725A (en) | 2018-05-09 | 2018-05-09 | Automobile steering system optimization method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111666702A (en) * | 2020-06-08 | 2020-09-15 | 摩登汽车有限公司 | Method and device for optimizing mode of automobile steering system |
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| CN111666702A (en) * | 2020-06-08 | 2020-09-15 | 摩登汽车有限公司 | Method and device for optimizing mode of automobile steering system |
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