CN110348082A - A kind of design method of toe-in control arm - Google Patents
A kind of design method of toe-in control arm Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of design methods of prenex control arm.Include: to analyze the performance of reference Chinese herbaceous peony beam control arm, obtains performance constrained parameters；The design space for determining the extruding section of prenex control arm to be designed, is based on performance constraints parameter, carries out topological optimization to section is squeezed, obtains the material distribution form for squeezing section；Three-dimensional extended is carried out along the thickness direction for squeezing section, obtains first edition toe-in control arm；Based on performance constraints parameter, appearance, the size of first edition toe-in control arm are optimized, obtain second edition toe-in control arm；Industrial analysis is carried out to second edition toe-in control arm, continues the structural parameters for adjusting second edition toe-in control arm according to the result of analysis, obtains third edition toe-in control arm；Performance evaluation is carried out to third edition toe-in control arm, performance parameter is obtained if performance parameter is qualified and third edition toe-in control arm is determined as target toe-in control arm.It can effectively realize the lightweight of prenex control arm.
Description
Technical field
The present embodiments relate to technical field of automobile design more particularly to a kind of design methods of prenex control arm.
Background technique
Prenex control arm is one of the force transferring part of automobile chassis suspension system, its main function be transmitting subframe and
Torque between knuckle changes the toe-angle of wheel.The design requirement structure of prenex control arm is simple, good reliability, has
Some strength.
Extrudate toe-in control arm the processes final molding such as adds by aluminium alloy extruded, cutting, machine, relative to steel-pipe welding
Or aluminium alloy casting/forging technology, have many advantages, such as that lightweight, low cost, simple process, die cost be low, high production efficiency.
The existing design method of prenex control arm is to be passed through on the basis of to mark vehicle or platform truck original control arm according to design
It tests and performance requirement passes through FEM calculation repeatedly or test to original prenex control arm progress structure and material distribution reference
Verifying and modification obtain the part for meeting design requirement, and existing design method has the disadvantage in that
If 1, unreasonable to mark vehicle or the design of platform truck toe-in control arm, the prenex control arm subsequent design of new design will lead to
It is unreasonable, it is unsatisfactory for design requirement or design redundancy, and waste time and manpower；
2, the control arm lightweight optimization method of current mainstream mostly uses topological optimization, and method is relatively simple, and only one
Skeleton profile, structure is not careful enough, inaccurate to pattern, size, the thick control of material；
3, other than performance and structure, extrusion process factor is not considered in extrudate toe-in control arm design process,
Although the die sinking direction of punching press and forging can be considered in some structural optimization softwares, extrusion process process bring can not be considered
Change in size and stress variation.
Summary of the invention
The embodiment of the present invention provides a kind of design method of prenex control arm, can effectively realize the light weight of prenex control arm
Change, while reducing the period of prenex control arm design and cost, method be general and strong operability.
In a first aspect, the embodiment of the invention provides a kind of design methods of prenex control arm, this method comprises:
The performance of reference Chinese herbaceous peony beam control arm is analyzed, performance constrained parameters are obtained；Wherein, the performance constraints ginseng
Number includes: steady-state performance parameter, fatigue behaviour parameter and Modal Performances parameter；
The design space for determining the extruding section of prenex control arm to be designed, is based on the performance constraints parameter, to described
It squeezes section and carries out topological optimization, obtain the material distribution form for squeezing section；
Three-dimensional extended is carried out along the thickness direction for squeezing section, obtains first edition toe-in control arm；
Based on the performance constraints parameter, the apparent size of the first edition toe-in control arm is optimized, obtains second
The prenex control arm of version；
To the second edition toe-in control arm carry out industrial analysis, according to the result of analysis continue adjust the second edition before beam control
The structural parameters of arm processed obtain third edition toe-in control arm；
Performance evaluation is carried out to the third edition toe-in control arm, obtains performance parameter, if performance parameter is qualified, by the
Three editions prenex control arms are determined as target toe-in control arm.
Further, the performance of reference Chinese herbaceous peony beam control arm is analyzed, obtains performance constrained parameters, comprising:
It obtains with reference to the static load and dynamic load at Chinese herbaceous peony beam control arm tie point；
The finite element model for referring to Chinese herbaceous peony beam control arm is established, the static load and dynamic load input is described limited
Meta-model obtains steady-state performance parameter and fatigue behaviour parameter；
Model analysis is carried out based on the finite element model, obtains Modal Performances parameter.
Further, it obtains with reference to the static load and dynamic load at Chinese herbaceous peony beam control arm tie point, comprising:
Test data, which is composed, according to the road of reference vehicle establishes multi-body Dynamics Model；
The tire ground connection power with reference to vehicle in the case where setting operating condition is calculated, tire ground connection power is inputted into more bodies and is moved
Mechanical model is obtained with reference to the static load and dynamic load at Chinese herbaceous peony beam control arm tie point.
Further, the finite element model for referring to Chinese herbaceous peony beam control arm is established, comprising:
Grid dividing is carried out to the simulation geometrical model of reference Chinese herbaceous peony beam control arm, the flexural pivot in the simulation geometrical model
It is simulated with the connection at bushing by rigid coupling unit；
Material parameter is arranged to the simulation geometrical model, obtains finite element model.
Further, it is determined that the design space in the extruding section of toe-in control arm to be designed, is joined based on the performance constraints
Number carries out topological optimization to the extruding section, obtains the material distribution form for squeezing section, comprising:
The design space for squeezing section is determined according to the largest contours of prenex control arm to be designed；
Based on the performance constraints parameter, topological optimization is carried out in design space, the material after being optimized is distributed shape
Formula.
Further, it is based on the performance constraints parameter, the apparent size of the first edition toe-in control arm is optimized,
Obtain second edition toe-in control arm, comprising:
The curved surface and fillet of the first edition toe-in control arm are smoothed；
Based on the performance constraints parameter, the size of the first edition toe-in control arm after adjusting smoothing processing obtains the second edition
Prenex control arm, the size include wall thickness, radius of corner, inner skeleton size.
Further, industrial analysis is carried out to the second edition toe-in control arm, adjustment the is continued according to the result of analysis
The structural parameters of two editions prenex control arms, obtain third edition toe-in control arm, comprising:
Industrial analysis is carried out according to setting process to the second edition toe-in control arm, obtains stress and deformation analysis knot
Fruit；
Structural adjustment is carried out to second edition toe-in control arm according to the stress and deformation analysis result, before obtaining the third edition
Beam control arm.
Further, performance evaluation is carried out to the third edition toe-in control arm, obtains performance parameter, if performance parameter is closed
Third edition toe-in control arm is then determined as target toe-in control arm by lattice, comprising:
Finite element performance evaluation is carried out to the third edition toe-in control arm, obtains performance parameter；
The performance parameter and the performance constraints parameter are compared, determine whether third edition toe-in control arm closes
Lattice；
If qualified, third edition toe-in control arm is determined as target toe-in control arm.
Further, after third edition toe-in control arm is determined as target toe-in control arm, further includes:
Post-processing is carried out according to product demand to the target toe-in control arm；Wherein product demand includes chamfering, public affairs
Difference, roughness, technical requirements, relevant criterion.
It is provided in an embodiment of the present invention toe-in control arm design method, first to the performance of reference Chinese herbaceous peony beam control arm into
Row analysis, obtains performance constrained parameters；Then the design space for determining the extruding section of prenex control arm to be designed, is based on performance
Constrained parameters carry out topological optimization to section is squeezed, obtain the material distribution form for squeezing section, subsequently edge squeezes section
Thickness direction carries out three-dimensional extended, obtains first edition toe-in control arm, is subsequently based on performance constraints parameter, controls first edition toe-in
The apparent size of arm optimizes, and obtains second edition toe-in control arm, and carry out industrial analysis, root to second edition toe-in control arm
The structural parameters for continuing to adjust second edition toe-in control arm according to the result of analysis, obtain third edition toe-in control arm, finally to the
Three editions prenex control arms carry out performance evaluation, obtain performance parameter, if performance parameter is qualified, third edition toe-in control arm is true
It is set to target toe-in control arm.It can effectively realize the lightweight of prenex control arm, while reduce the week of prenex control arm design
Phase and cost, method be general and strong operability.
Detailed description of the invention
Fig. 1 is the flow chart of the design method of the prenex control arm of one of embodiment of the present invention one；
Fig. 2 is the flow chart of the acquisition performance constrained parameters in the embodiment of the present invention one；
Fig. 3 is the prenex control arm optimization exemplary diagram in the embodiment of the present invention one.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is a kind of flow chart of the design method for prenex control arm that the embodiment of the present invention one provides, and the present embodiment can
The case where suitable for being designed to vehicle toe-in control arm, as shown in Figure 1, this method specifically comprises the following steps:
Step 110, the performance of reference Chinese herbaceous peony beam control arm is analyzed, obtains performance constrained parameters.
Wherein, performance constraints parameter includes: steady-state performance parameter, fatigue behaviour parameter and Modal Performances parameter.It is stability
Energy parameter may include the performance parameters such as the rigidity of prenex control arm, intensity；Fatigue behaviour parameter may include prenex control arm
Each point at fatigue life and fatigue damage value；Modal Performances parameter may include the preceding 6 rank elastomer mould of prenex control arm
The vibration shape and intrinsic frequency of state.It can be with reference to vehicle to mark vehicle or platform truck.Fig. 2 is to obtain performance constraints in the embodiment of the present invention
The flow chart of parameter.
Specifically, analyzing the performance of reference Chinese herbaceous peony beam control arm, the process for obtaining performance constrained parameters be may is that
It obtains with reference to the static load and dynamic load at Chinese herbaceous peony beam control arm tie point；Establish the finite element for referring to Chinese herbaceous peony beam control arm
Static load and dynamic load are inputted finite element model, obtain steady-state performance parameter and fatigue behaviour parameter by model；Based on having
It limits meta-model and carries out model analysis, obtain Modal Performances parameter.
Wherein, the mode obtained with reference to static load and dynamic load at Chinese herbaceous peony beam control arm tie point may is that root
Multi-body Dynamics Model is established according to the road spectrum test data of reference vehicle；It calculates the tire with reference to vehicle in the case where setting operating condition and is grounded power,
Tire ground connection power is inputted into multi-body Dynamics Model, obtains and is carried with reference to the static load at Chinese herbaceous peony beam control arm tie point with dynamic
Lotus.
Road spectrum test data can be the 12 channel Random Road load modal datas with reference to vehicle.It includes: vertical for setting operating condition
Operating condition, turning condition, reversing braking, maximum braking, maximum acceleration, advance parking brake, reversing parking brake operating condition, actual road test etc..Tool
Body, test data is composed according to the road of reference vehicle and obtains suspension property parameter, and establishes many-body dynamics mould with Adams software
Then tire ground connection power under each setting operating condition is inputted multi-body Dynamics Model, obtains and connect with reference to Chinese herbaceous peony beam control arm by type
Static load and dynamic load at point.
Wherein, the mode for establishing the finite element model with reference to Chinese herbaceous peony beam control arm may is that reference Chinese herbaceous peony beam control arm
Geometrical model carry out grid dividing, the connection at flexural pivot and bushing in geometrical model is simulated by rigid coupling unit；To several
Material parameter is arranged in what model, obtains finite element model.
Material parameter includes density, elasticity modulus and Poisson's ratio etc..
In the present embodiment, the finite element model using static load as loading environment input with reference to Chinese herbaceous peony beam control arm is carried out
Stable state linear analysis is obtained with reference to steady-state performances parameters such as rigidity, the intensity of Chinese herbaceous peony beam control arm.Optionally, it can also carry out
Buckling analysis obtains the flexural property parameter for referring to Chinese herbaceous peony beam control arm.Vehicle is referred to using dynamic load as loading environment input
The finite element model of prenex control arm carries out analysis of fatigue, obtains fatigue life and the fatigue referred at Chinese herbaceous peony beam control arm each point
Impairment value.Finite element model based on reference Chinese herbaceous peony beam control arm carries out Free Modal Analysis, obtains and refers to Chinese herbaceous peony beam control arm
Preceding 6 rank elastomer mode the vibration shape and intrinsic frequency.
Step 120, the design space for determining the extruding section of prenex control arm to be designed, is based on performance constraints parameter, right
It squeezes section and carries out topological optimization, obtain the material distribution form for squeezing section.
In the present embodiment, prenex control arm is made of extrusion process, and extrusion process is carried out etc. based on setting section
Thickness squeezes, it is therefore desirable to determine the design space in the extruding section of prenex control arm to be designed, and be established with largest contours
Design space.
Specifically, the design space for squeezing section is determined according to the largest contours of prenex control arm to be designed first, then
Based on performance constraints parameter, material distribution form of the material in the distribution accounting for squeezing section, after being optimized is gradually decreased.
In the present embodiment, the distribution accounting of other regions adjustment material in squeezing section in addition to bushing, flexural pivot region,
It is adjusted using performance constraints parameter as restrictive condition.Guaranteeing the performance parameter of prenex control arm to be designed not less than property
Under the premise of energy constrained parameters, so that prenex control arm materials are minimum.
Step 130, three-dimensional extended is carried out along the thickness direction for squeezing section, obtains first edition toe-in control arm.
In the present embodiment, after carrying out three-dimensional extended, prenex control arm 3-D geometric model to be designed can be obtained, is determined as
First edition toe-in control arm.
Step 140, it is based on performance constraints parameter, the apparent size of first edition toe-in control arm is optimized, obtains second
The prenex control arm of version.
Specifically, being smoothed first to the curved surface and fillet of first edition toe-in control arm, it is then based on performance constraints
Parameter, adjust smoothing processing after first edition toe-in control arm size, obtain second edition toe-in control arm, size include wall thickness,
Radius of corner, inner skeleton size.
In the present embodiment, the smoothing processing of curved surface and fillet can be carried out with Catia software.It is with performance constraints parameter
Restrictive condition adjusts and squeezes wall thickness, radius of corner, inner skeleton size, so that prenex control arm quality is most light.Illustratively,
Fig. 3 is that prenex control arm optimizes exemplary diagram in the embodiment of the present invention.
Step 150, industrial analysis is carried out to second edition toe-in control arm, is continued before adjusting the second edition according to the result of analysis
The structural parameters of beam control arm obtain third edition toe-in control arm.
Specifically, carrying out industrial analysis according to setting process to second edition toe-in control arm, stress and deformation analysis are obtained
As a result；Structural adjustment is carried out to second edition toe-in control arm according to stress and deformation analysis result, obtains third edition toe-in control
Arm.
Wherein, setting process includes model orientation, extracts work belt, creation bar, material selection, technological parameter, execution
Calculate and etc..Stress and deformation analysis are obtained as a result, carrying out structural adjustment and optimization to stress, the larger position of deformation, is improved
Stress and deformation, it is ensured that craftsmanship.
Step 160, performance evaluation is carried out to third edition toe-in control arm, obtains performance parameter, if performance parameter is qualified,
Third edition toe-in control arm is determined as target toe-in control arm.
Specifically, carrying out finite element performance evaluation to third edition toe-in control arm, obtain performance parameter, by performance parameter and
Performance constraints parameter is compared, and determines whether third edition toe-in control arm is qualified, if qualified, by third edition toe-in control arm
It is determined as target toe-in control arm.
It optionally, further include following steps: right after third edition toe-in control arm is determined as target toe-in control arm
Target toe-in control arm carries out post-processing according to product demand；Wherein product demand includes chamfering, tolerance, roughness, technology
It is required that, relevant criterion.So that the prenex control arm designed more meets product requirement.
It is provided in an embodiment of the present invention toe-in control arm design method, first to the performance of reference Chinese herbaceous peony beam control arm into
Row analysis, obtains performance constrained parameters；Then the design space for determining the extruding section of prenex control arm to be designed, is based on performance
Constrained parameters carry out topological optimization to section is squeezed, obtain the material distribution form for squeezing section, subsequently edge squeezes section
Thickness direction carries out three-dimensional extended, obtains first edition toe-in control arm, is subsequently based on performance constraints parameter, controls first edition toe-in
The apparent size of arm optimizes, and obtains second edition toe-in control arm, and carry out industrial analysis, root to second edition toe-in control arm
The structural parameters for continuing to adjust second edition toe-in control arm according to the result of analysis, obtain third edition toe-in control arm, finally to the
Three editions prenex control arms carry out performance evaluation, obtain performance parameter, if performance parameter is qualified, third edition toe-in control arm is true
It is set to target toe-in control arm.It can effectively realize the lightweight of prenex control arm, while reduce the week of prenex control arm design
Phase and cost, method be general and strong operability.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (9)
1. a kind of design method of toe-in control arm characterized by comprising
The performance of reference Chinese herbaceous peony beam control arm is analyzed, performance constrained parameters are obtained；Wherein, the performance constraints parameter packet
It includes: steady-state performance parameter, fatigue behaviour parameter and Modal Performances parameter；
The design space for determining the extruding section of prenex control arm to be designed, is based on the performance constraints parameter, to the extruding
Section carries out topological optimization, obtains the material distribution form for squeezing section；
Three-dimensional extended is carried out along the thickness direction for squeezing section, obtains first edition toe-in control arm；
Based on the performance constraints parameter, appearance, the size of the first edition toe-in control arm are optimized, before obtaining the second edition
Beam control arm；
Industrial analysis is carried out to the second edition toe-in control arm, is continued to adjust second edition toe-in control arm according to the result of analysis
Structural parameters, obtain third edition toe-in control arm；
Performance evaluation is carried out to the third edition toe-in control arm, performance parameter is obtained, if performance parameter is qualified, by the third edition
Prenex control arm is determined as target toe-in control arm.
2. being obtained the method according to claim 1, wherein analyzing the performance of reference Chinese herbaceous peony beam control arm
Obtain performance constraints parameter, comprising:
It obtains with reference to the static load and dynamic load at Chinese herbaceous peony beam control arm tie point；
The finite element model for referring to Chinese herbaceous peony beam control arm is established, the static load and dynamic load are inputted into the finite element mould
Type obtains steady-state performance parameter and fatigue behaviour parameter；
Model analysis is carried out based on the finite element model, obtains Modal Performances parameter.
3. according to the method described in claim 2, it is characterized in that, obtaining with reference to the static load at Chinese herbaceous peony beam control arm tie point
Lotus and dynamic load, comprising:
Test data, which is composed, according to the road of reference vehicle establishes multi-body Dynamics Model；
The tire ground connection power with reference to vehicle in the case where setting operating condition is calculated, tire ground connection power is inputted into the many-body dynamics
Model is obtained with reference to the static load and dynamic load at Chinese herbaceous peony beam control arm tie point.
4. according to the method described in claim 2, it is characterized in that, foundation refers to the finite element model of Chinese herbaceous peony beam control arm, packet
It includes:
Grid dividing is carried out to the geometrical model of reference Chinese herbaceous peony beam control arm, the company at flexural pivot and bushing in the geometrical model
It connects and is simulated by rigid coupling unit；
Material parameter is arranged to the simulation geometrical model, obtains finite element model.
5. the method according to claim 1, wherein determining the design in the extruding section of prenex control arm to be designed
Space is based on the performance constraints parameter, carries out topological optimization to the extruding section, obtains the material for squeezing section point
Cloth form, comprising:
The design space for squeezing section is determined according to the largest contours of prenex control arm to be designed；
Based on the performance constraints parameter, topological optimization is carried out in design space, the material distribution form after being optimized.
6. the method according to claim 1, wherein the performance constraints parameter is based on, to the first edition toe-in
The apparent size of control arm optimizes, and obtains second edition toe-in control arm, comprising:
The curved surface and fillet of the first edition toe-in control arm are smoothed；
Based on the performance constraints parameter, it is prenex to obtain the second edition for the size of the first edition toe-in control arm after adjusting smoothing processing
Control arm, the size include wall thickness, radius of corner, inner skeleton size.
7. the method according to claim 1, wherein to the second edition toe-in control arm carry out industrial analysis,
Continue the structural parameters of adjustment second edition toe-in control arm according to the result of analysis, obtain third edition toe-in control arm, comprising:
Industrial analysis is carried out according to setting process to the second edition toe-in control arm, obtains stress and deformation analysis result；
Structural adjustment is carried out to second edition toe-in control arm according to the stress and deformation analysis result, obtains beam control before the third edition
Arm processed.
8. the method according to claim 1, wherein to the third edition toe-in control arm carry out performance evaluation,
It obtains performance parameter and third edition toe-in control arm is determined as target toe-in control arm if performance parameter is qualified, comprising:
Finite element performance evaluation is carried out to the third edition toe-in control arm, obtains performance parameter；
The performance parameter and the performance constraints parameter are compared, determine whether third edition toe-in control arm is qualified；
If qualified, third edition toe-in control arm is determined as target toe-in control arm.
9. the method according to claim 1, wherein the beam control before third edition toe-in control arm to be determined as to target
After arm processed, further includes:
Post-processing is carried out according to product demand to the target toe-in control arm；Wherein installation requirements include chamfering, it is tolerance, thick
Rugosity, technical requirements, relevant criterion.
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