CN109598005A - The construction method of tire positional parameter acquisition methods and automobile tire motion envelope - Google Patents
The construction method of tire positional parameter acquisition methods and automobile tire motion envelope Download PDFInfo
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- CN109598005A CN109598005A CN201710918464.4A CN201710918464A CN109598005A CN 109598005 A CN109598005 A CN 109598005A CN 201710918464 A CN201710918464 A CN 201710918464A CN 109598005 A CN109598005 A CN 109598005A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000033001 locomotion Effects 0.000 title claims abstract description 30
- 238000010276 construction Methods 0.000 title claims abstract description 10
- 239000000725 suspension Substances 0.000 claims abstract description 40
- 238000013016 damping Methods 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 5
- 241000208340 Araliaceae Species 0.000 claims description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 3
- 235000008434 ginseng Nutrition 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 description 7
- 238000013461 design Methods 0.000 description 7
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- 239000002131 composite material Substances 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
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- G06F30/20—Design optimisation, verification or simulation
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Abstract
The present invention provides a kind of tire positional parameter acquisition methods and the construction method of automobile tire motion envelope, tire positional parameter acquisition methods of the invention comprise the following steps that s1, collect parameter needed for suspension assembly models；S2, components in suspension assembly are subjected to FEM meshing, and are converted into the identifiable MNF file of Adams software；S3, the components MNF file generated in invocation step s2 in Adams software create components elastomeric model, and the multi-body Dynamics Model of suspension assembly is built based on components practical structures in suspension assembly；S4, the tire into the suspension assembly multi-body Dynamics Model that step s3 is built apply driving load and carry out wheel jump emulation, to obtain the tire positional parameter under respective loads operating condition.Influence of the components characteristic to tire positional parameter in suspension assembly can be fully taken into account in tire positional parameter acquisition methods of the present invention, can obtain more accurate tire positional parameter.
Description
Technical field
The present invention relates to technical field of automobile design, in particular to a kind of tire positional parameter acquisition methods.The present invention is also
It is related to a kind of method using acquired tire positional parameter building automobile tire motion envelope.
Background technique
When carrying out automobile General Layout Design, it is necessary to check to the movement of tire, on the one hand can be prevented by checking
Only tire is interfered with periphery member during the motion, on the other hand also can get tire institute under limiting condition by checking
The space occupied, and determine tire, the gap of wheel cover and the boundary dimensions of wheel cover.
In the prior art, designer by obtain tire in different positions positional parameter (mainly include toe-in angle,
Camber angle, core wheel coordinate) to obtain tire motion envelope, tire and periphery can intuitively be observed by the tire motion envelope
The interference situation of part so as to improve the efficiency and accuracy of structure design at automotive development initial stage, and can also be the later period
Design alteration and the manufacture of physical prototyping provide foundation, and then shorten the development cycle of vehicle.
Currently, method there are mainly two types of the acquisition of tire positional parameter and the buildings of tire motion envelope, one is
The extraction of positional parameter and the creation of tire motion envelope are completed in CATIA software, the second is first completing positioning ginseng in Adams
Several extractions, then parameter is inputted in CATIA software to the creation for completing tire motion envelope.
In above two mode, the extraction of positional parameter and the creation of tire motion envelope, base are completed in CATIA software
It is limited in the function of CATIA, this method cannot consider the deformation of each components in suspension assembly, and only to the drive form of tire
There is displacement.And suspension rigid model is built in Adams software, to extract in tire positional parameter, due to being taken in Adams software
The suspension assembly model built is rigid model, although it is contemplated that the deformation of bushing, but also have ignored each components of suspension assembly
The flexible variety of itself.In addition, the rigid model built in Adams software does not account for the difference of damper structure to wheel yet
The influence of tire positional parameter.
Summary of the invention
In view of this, the present invention is directed to propose a kind of tire positional parameter acquisition methods, can get more accurate wheel
Tire positional parameter.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of tire positional parameter acquisition methods, the acquisition methods comprise the following steps that
S1, parameter collection collect parameter needed for suspension assembly models；
Components in suspension assembly are carried out FEM meshing by s2, components flexibility, and it is soft to be converted into Adams
The identifiable MNF file of part；
S3, multi-body Dynamics Model are built, the components MNF file generated in invocation step s2 in Adams software, wound
Components elastomeric model is built, and builds the many-body dynamics mould of suspension assembly based on components practical structures in suspension assembly
Type；
S4, wheel jump emulation and parameter extraction, the tire into the suspension assembly multi-body Dynamics Model that step s3 is built
Apply driving load and carry out wheel jump emulation, to obtain the tire positional parameter under respective loads operating condition.
Further, in step s1, collected parameter includes suspension assembly digital-to-analogue, elastic element characteristic curve, vibration damping
Device characteristic file and whole-car parameters.
Further, the elastic element includes damping spring, bushing and buffer stopper.
Further, the whole-car parameters include front axle axle load, rear axle axle load, front tread, rear track and vehicle
Height of center of mass.
Further, the components in the step s2 include lower swing arm, stabiliser bar, subframe, damper and knuckle.
Further, in step s4, the driving load that Xiang Suoshu tire applies, which is included in core wheel or is grounded in tire, to be clicked through
Row applies.
Compared with the existing technology, present invention has the advantage that
In tire positional parameter acquisition methods of the invention by the basis of suspension assembly components practical structures into
Row Multi-body kinematics model is built, and can fully take into account in suspension assembly components characteristic to the shadow of tire positional parameter
It rings, so as to the state under more true reflection real vehicle, and more accurate tire positional parameter can be obtained.
In addition, by the introducing of elastic element characteristic curve and vibration-damper characterist file in the present invention, also it is contemplated that due to
Influence of the deformation and damper structure form of the elastic elements such as bushing, spring and buffer stopper to tire positional parameter.And lead to
The application for carrying out driving load using core wheel or tire grounding point is crossed, the emulation of a variety of driving composite conditions can also be carried out, with benefit
In more fully, the acquisition of accurate tire positional parameter.
Another object of the present invention is to propose that a kind of construction method of automobile tire motion envelope, the construction method include
The obtaining step of tire positional parameter as described above, and the tire positional parameter input CATIA software of the acquisition is created
Build tire motion envelope.
Tire motion envelope construction method of the invention may make by using tire positional parameter acquisition methods as above
Tire positional parameter for the creation of tire motion envelope is more accurate, and then it is also possible that the tire motion envelope symbol built
Real vehicle situation is closed, and is conducive to improve the validity of motion envelope analysis result.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of tire positional parameter acquisition methods described in the embodiment of the present invention；
Fig. 2 is the Path of Force Transfer of the damper under one structure of example described in the embodiment of the present invention；
Fig. 3 is the Path of Force Transfer of the damper under two structure of example described in the embodiment of the present invention；
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
The present embodiment is related to a kind of tire positional parameter acquisition methods, the tire positional parameter acquisition methods by
Automotive suspension assembly is modeled in Adams software, and carry out operating condition emulation by applying load, to obtain for creating
Tire positional parameter needed for tire motion envelope, the tire positional parameter mainly include the toe-in angle of tire, camber angle and
Core wheel coordinate, and positional parameter obtained can be used for constructing tire motion envelope, to realize the design & check to tire.
As shown in fig. 1, the tire positional parameter acquisition methods of the present embodiment specifically include following step:
S1, parameter collection step: parameter needed for suspension assembly models is collected；
S2, components flexibility step: components in suspension assembly are subjected to FEM meshing, and are converted into
The identifiable MNF file of Adams software；
S3, multi-body Dynamics Model build step: the components MNF text generated in invocation step s2 in Adams software
Part creates components elastomeric model, and more body power of suspension assembly are built based on components practical structures in suspension assembly
Learn model；
S4, wheel jump emulation and parameter extracting step: into the suspension assembly multi-body Dynamics Model that step s3 is built
Tire applies driving load and carries out wheel jump emulation, to obtain the tire positional parameter under respective loads operating condition.
Specifically, in the parameter collection of step s1, suspension assembly modeling needed for parameter include suspension assembly digital-to-analogue,
Elastic element characteristic curve and vibration-damper characterist file and whole-car parameters.Wherein, which includes that suspension is total
At the digital-to-analogue file of components each in composition, elastic element specifically includes bushing, buffer stopper and damping spring, the characteristic of each component
Curve can be obtained from the description of product, or can also obtain characteristic curve by testing inspection.Model of damper can be according to vibration damping
Device structure generates in Adams software, and whole-car parameters then include the front axle axle load, rear axle axle load, front tread, rear wheel rotation of automobile
Away from and vehicle height of center of mass, these above-mentioned vehicle data can obtain from Automobile Design document.
In the step s2 of the present embodiment, specially by lower swing arm, stabiliser bar, subframe, the vibration damping in suspension assembly digital-to-analogue
The threedimensional model of each components such as device and knuckle carries out finite element in finite-element preprocessing software ANSA or HyperMesh
Grid dividing, and finally the mnf file that Adams software can identify is converted by the finite element model of each component.
On the basis of step s2 generates each components mnf file, in the step s3 of the present embodiment, in Adams software
The mnf file of each components generated in invocation step s2, the elastomeric model of each components can be created with this, then can base
The practical structures possessed by each components in suspension assembly, complete the creation of the multi-body Dynamics Model of each components, then
The assembly of each components is carried out by the type of attachment of design, more bodies that suspension assembly just can be built in Adams software are dynamic
Mechanical model.
Wherein, in above-mentioned s3 step, for carrying out its multi-body Dynamics Model with the practical structures of each components
Creation, can be illustrated by taking the damper of suspension assembly as an example.
Existing damper structure can be divided into two kinds by the transmission path of power, the Path of Force Transfer of the damper of the first structure
As shown in Figure 2, absorber seat upper plate is fixed with absorber seat lower plate by bolt and vehicle body in the damper of the structure
Connection, outer barrel of absorber and absorber seat lower plate are flexibly connected by spring and buffer stopper, on upper traveller and absorber seat
Plate is connected by bushing.As seen from Figure 2, the transmission path of power has two in the damper under above structure.
The Path of Force Transfer of the damper of second of structure is as shown in Figure 3, at this time damper branch in the damper of the structure
Seat is bolted to connection with vehicle body, and upper traveller and absorber seat are flexibly connected by bushing, outer barrel of absorber and upper cunning
Column is connected by spring, buffer stopper.As seen from Figure 3, the transmission path of the power of the damper under the structure only has one.
And if in Adams software create multi-body Dynamics Model when, by the damper of above two structure with one
The topological structure of Path of Force Transfer builds damper multi-body Dynamics Model, by the two damper multi-body Dynamics Model institutes
The suspension assembly multi-body Dynamics Model finally built is extracted after wheel jumps emulation (specific simulation process sees below described)
Tire positional parameter is as shown in table 1, wherein the tire positional parameter in table 1 is to obtain under load working condition of the same race.
Table 1:
It can be seen that by tire positional parameter obtained in table 1, if being taken with the topological structure of a Path of Force Transfer
The multi-body Dynamics Model of the damper of different structure is built, with the obtained tire positioning ginseng of the damper multi-body Dynamics Model
Number can not reflect the damper of different structure to influence brought by tire positional parameter well, therefore damper is built
Mould mode has important influence to the accuracy of tire positional parameter, certainly will need to create it according to the practical structures of damper
Multi-body Dynamics Model.
For the present embodiment in step s4, it is in Adams software by applying in core wheel or tire grounding point that wheel, which jumps emulation,
Driving load is added to drive tire motion, thus by the toe-in angle of the tire under Adams Software Create respective loads operating condition, flare
The positional parameters such as angle and core wheel coordinate.In specific emulation, by applying the difference of load manner, can carry out under different operating conditions
Emulation, it is general through frequently with emulation operating condition have single operating condition and composite condition, wherein single operating condition include jolt operating condition,
Accelerating mode, damped condition and steering situation, and composite condition then include skid steer, accelerate turn to and advance impact and
Reversing impact, various operating conditions can be selected in Adams software by parameter setting.
In the tire positional parameter acquisition methods of the present embodiment, drawn for carrying out grid by ANSA, HyperMesh software
Divide and flexibility processing, foundation and wheel jump simulation analysis by Adams software progress Multi-body kinematics model can refer to
The application method of above-mentioned software, and can be prompted in the help document of each software, the concrete operations for each software, this reality
It applies in example and no longer repeats one by one.
By on the basis of suspension assembly components practical structures in the tire positional parameter acquisition methods of the present embodiment
It carries out Multi-body kinematics model to build, components characteristic can be fully taken into account in suspension assembly to the shadow of tire positional parameter
It rings, also it is contemplated that deformation and damper structure form due to elastic elements such as bushing, spring and buffer stoppers position tire
The influence of parameter, while the emulation of a variety of driving composite conditions can be also carried out, so as under more true, comprehensive reflection real vehicle
State, and more accurate tire positional parameter can be obtained.
Tire positional parameter acquisition methods tire obtained as described above is utilized in addition, also including in the present embodiment
The method that positional parameter constructs automobile tire motion envelope, the construction method are specially to input acquired tire positional parameter
Tire motion envelope is created in CATIA software.The software still can refer to by the method that CATIA software establishes tire motion envelope
Application method, and can be prompted in the help document of software, also be repeated no more herein.
The tire motion envelope construction method of the present embodiment positions acquisition methods by using foregoing tire, can make
The tire positional parameter that must be used for the creation of tire motion envelope is more accurate, and then it is also possible that the tire motion envelope built
Meet real vehicle situation, and is conducive to improve the validity of motion envelope analysis result.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of tire positional parameter acquisition methods, which is characterized in that the acquisition methods comprise the following steps that
S1, parameter collection collect parameter needed for suspension assembly models；
Components in suspension assembly are carried out FEM meshing by s2, components flexibility, and being converted into Adams software can
The MNF file of identification；
S3, multi-body Dynamics Model are built, the components MNF file generated in invocation step s2 in Adams software, creation zero
Component elastomeric model, and build based on components practical structures in suspension assembly the multi-body Dynamics Model of suspension assembly；
S4, wheel jump emulation and parameter extraction, and the tire into the suspension assembly multi-body Dynamics Model that step s3 is built applies
Driving load carries out wheel and jumps emulation, to obtain the tire positional parameter under respective loads operating condition.
2. tire positional parameter acquisition methods according to claim 1, it is characterised in that: in step s1, collected ginseng
Number includes suspension assembly digital-to-analogue, elastic element characteristic curve, vibration-damper characterist file and whole-car parameters.
3. tire positional parameter acquisition methods according to claim 2, it is characterised in that: the elastic element includes damping
Spring, bushing and buffer stopper.
4. tire positional parameter acquisition methods according to claim 2, it is characterised in that: the whole-car parameters include front axle
Axle load, rear axle axle load, front tread, rear track and vehicle height of center of mass.
5. tire positional parameter acquisition methods according to claim 1, it is characterised in that: the components in the step s2
Including lower swing arm, stabiliser bar, subframe, damper and knuckle.
6. tire positional parameter acquisition methods according to any one of claim 1 to 5, it is characterised in that: in step s4,
The driving load applied to the tire is included in core wheel or is applied in tire grounding point.
7. a kind of construction method of automobile tire motion envelope, which is characterized in that the construction method includes:
The obtaining step of tire positional parameter as described in claim 1, and,
The tire positional parameter input CATIA software of the acquisition is created into tire motion envelope.
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| CN201710918464.4A CN109598005A (en) | 2017-09-30 | 2017-09-30 | The construction method of tire positional parameter acquisition methods and automobile tire motion envelope |
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Cited By (3)
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| CN110598318A (en) * | 2019-09-10 | 2019-12-20 | 安徽江淮汽车集团股份有限公司 | Suspension performance analysis method based on vehicle body |
| CN112861402A (en) * | 2021-02-05 | 2021-05-28 | 西藏宁算科技集团有限公司 | Flexible suspension model and modeling method thereof |
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Application publication date: 20190409 |