CN104615890B - The method and device that load is extracted under limiting condition - Google Patents
The method and device that load is extracted under limiting condition Download PDFInfo
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- CN104615890B CN104615890B CN201510068254.1A CN201510068254A CN104615890B CN 104615890 B CN104615890 B CN 104615890B CN 201510068254 A CN201510068254 A CN 201510068254A CN 104615890 B CN104615890 B CN 104615890B
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Abstract
The embodiment of the present invention provides the method and device that load is extracted under a kind of limiting condition.This method includes：Multi-body dynamics automobile model according to target vehicle establishes the first analysis model and the second analysis model；Using the first analysis model or the second analysis model as initial model；Initial model is changed according to selected limiting condition；The load of initial model analysis vehicle chassis part and vehicle body under each limiting condition according to modification, obtains the load output file suitable for finite element analysis, and load output file is FEM forms.The embodiment of the present invention is that each limiting condition selectes initial model according to two analysis models, its corresponding initial model is changed for selected limiting condition, and analyze the load of vehicle chassis part and vehicle body under all selected limiting conditions, load is exported in the form of load output file, improves load extraction accuracy and efficiency under limiting condition.
Description
Technical field
The present embodiments relate to the method and device that load under automotive field, more particularly to a kind of limiting condition is extracted.
Background technology
Suspension design is one of most important design in Automobile Design, and the quality of suspension property directly affects automotive performance,
Suspension is a complicated system in itself, and force status is complex, it is necessary to analyze vehicle bottom before design suspension and vehicle body
The load of disk parts and vehicle body under various limiting conditions.
The front and rear tire force under each limiting condition is generally first calculated, then fore suspension and rear suspension is analyzed respectively with fore suspension and rear suspension model
The load of parts and vehicle body, its shortcoming is that stress of each tire under various limiting conditions is difficult accurately to calculate, and vehicle body is consolidated
The vehicle body load deflections extracted in the case of fixed are larger.In addition, the side by establishing an analysis model to each limiting condition
Formula extracts the load of vehicle chassis part and vehicle body under various limiting conditions, it is necessary to 19 whole vehicle models be established, if model
Node number changed, also need to further determine that the corresponding relation between result of calculation and node number so that limiting condition
Lower load extraction efficiency is low.
In the prior art, under limiting condition there is the problem of accurate low low with efficiency in load extracting method.
The content of the invention
The embodiment of the present invention provides the method and device that load is extracted under a kind of limiting condition, to improve limiting condition download
The accuracy and efficiency of lotus extracting method.
The one side of the embodiment of the present invention is to provide a kind of method that load is extracted under limiting condition, including：
Multi-body dynamics automobile model according to target vehicle establishes the first analysis model and the second analysis model；
Using first analysis model or second analysis model as initial model corresponding to each limiting condition；
The initial model is changed according to selected limiting condition and obtains the initial model of modification, and determines vehicle chassis zero
The load output file of part and vehicle body under all limiting conditions；
Initial model according to the modification analyzes the vehicle chassis part and vehicle body under each limiting condition
Load, obtain the load output file suitable for finite element analysis, the load output file includes the vehicle chassis zero
The load of part and vehicle body under all limiting conditions, and the load output file is FEM forms.
The other side of the embodiment of the present invention is to provide load extraction element under a kind of limiting condition, including：
Analysis model establishes module, and the first analysis model is established for the multi-body dynamics automobile model according to target vehicle
With the second analysis model；
Initial model determining module, for using first analysis model or second analysis model as each limit work
Initial model corresponding to condition；
Modified module, the initial model changed is obtained for changing the initial model according to selected limiting condition；
Determining module, for determining the load output file of vehicle chassis part and vehicle body under all limiting conditions；
Output module, for analyzing the vehicle chassis part and vehicle body described according to the initial model of the modification
Load under each limiting condition, obtains the load output file suitable for finite element analysis, and the load output file includes institute
The load of vehicle chassis part and vehicle body under all limiting conditions is stated, and the load output file is FEM forms.
The method and device that load is extracted under limiting condition provided in an embodiment of the present invention, the vehicle according to target vehicle are more
Body dynamics model establishes two analysis models, and is that each limiting condition selectes initial model according to two analysis models, for
Selected limiting condition changes its corresponding initial model, and analyzes vehicle chassis part and vehicle body in all selected limit
Load under operating mode, load are exported in the form of load output file, it is not necessary to calculate the tire force under each limiting condition, no
Need to extract vehicle body load in the case where vehicle body is fixed, improve load under limiting condition and extract accuracy, in addition, it is not necessary that
An analysis model is established for each limiting condition, improves load extraction efficiency under limiting condition.
Brief description of the drawings
Fig. 1 is the method flow diagram that load is extracted under limiting condition provided in an embodiment of the present invention；
Fig. 2 is the structure chart of load extraction element under limiting condition provided in an embodiment of the present invention；
Fig. 3 is the structure chart of load extraction element under the limiting condition that another embodiment of the present invention provides.
Embodiment
Fig. 1 is the method flow diagram that load is extracted under limiting condition provided in an embodiment of the present invention.The embodiment of the present invention carries
The method that load is extracted under limiting condition is supplied, this method comprises the following steps that：
Step S101, the multi-body dynamics automobile model according to target vehicle establishes the first analysis model and the second analysis mould
Type；
The multi-body dynamics automobile model according to target vehicle establish the first analysis model and the second analysis model it
Before, in addition to：Establish the multi-body dynamics automobile model of the target vehicle；
The multi-body dynamics automobile model for establishing the target vehicle includes：Establish the front and rear outstanding of the target vehicle
Frame model, and the theoretical analysis result of the KC curves of the analysis fore suspension and rear suspension model acquisition and actual tests result are to mark；Build
Found the multi-body dynamics automobile model of the target vehicle, the front axle load of the multi-body dynamics automobile model, rear axle load
Meet preparatory condition with vehicle height of center of mass, and the multi-body dynamics automobile model includes engine mockup.
The embodiment of the present invention establishes two by establishing multi-body dynamics automobile model of the target vehicle based on being fully loaded with
Analysis model, the first analysis model and the second analysis model.
Step S102, using first analysis model or second analysis model as initial corresponding to each limiting condition
Model；
The embodiment of the present invention provides a variety of limiting conditions, for each limiting condition, selects the first analysis model and the
One of two analysis models are used as initial model.
The corresponding lateral and longitudinal acceleration of first analysis model is that the vehicle that zero, normal acceleration is 1.0G determines garden
Quasistatic operating mode；
Second analysis model corresponds to initial velocity as 60 kilometers/hour, and plugging acceleration is 0.5G operating mode；
All limiting conditions include 19 operating modes, wherein, the normal acceleration of operating mode 1 is 1.0G, operating mode 2 it is vertical
Acceleration is 3.5G, and the longitudinal impact power of operating mode 3 is 2G, and the side impacts of operating mode 4 are 2G, and the lateral right-hand bend of operating mode 5 is
1.2G, the longitudinally and laterally brakeing during cornereing of operating mode 6 is 0.74G, and the braking of operating mode 7 is 1.1G, and the plugging of operating mode 8 is
0.5G, the plugging of operating mode 9 is 1.0G, and the longitudinal acceleration of operating mode 10 is 0.5G, and the longitudinally and laterally turning of operating mode 11 adds
Speed is 0.45G, and the normal acceleration of the diagonal loading of operating mode 12 is 1.75G, and the normal acceleration of operating mode 13 is 2.5G,
The normal acceleration of operating mode 14 is 0.5G, and the lateral right-hand bend of operating mode 15 is 0.8G, and the lateral left-hand bend of operating mode 16 is 0.8G, work
The braking of condition 17 is 0.8G, and the longitudinal direction of operating mode 18 is -0.4G, and the longitudinal direction of operating mode 19 is 0.2G.
Second analysis model is the operating mode 8, the operating mode 9 and initial model corresponding to the operating mode 12, described
First analysis model is initial model corresponding to the operating mode in addition to the operating mode 8, the operating mode 9 and the operating mode 12.
Step S103, the initial model is changed according to selected limiting condition and obtains the initial model of modification, and determined
The load output file of vehicle chassis part and vehicle body under all limiting conditions；
The initial model that the selected limiting condition of the basis changes the initial model acquisition modification includes：
Increase longitudinal 2G power between tire and vehicle body in initial model corresponding to the operating mode 3；
Increase lateral 2G power between tire and vehicle body in initial model corresponding to the operating mode 4；
Increase left front tire and right rear fire vertical drive in initial model corresponding to the operating mode 12；
Increase wheel in initial model corresponding to the operating mode 10, the operating mode 11, the operating mode 18 and the operating mode 19
Tire driving torque；
According to vertical in initial model corresponding to the operating mode 2, the operating mode 12, the operating mode 13 and the operating mode 14
Acceleration changes acceleration of gravity；
It is 20 public that initial velocity is changed in initial model corresponding to the operating mode 10, the operating mode 18 and the operating mode 19
In/hour；
It is 80 kilometers/hour that initial velocity is changed in initial model corresponding to the operating mode 7 and the operating mode 17；
It is zero that initial velocity is changed in initial model corresponding to the operating mode 12.
The load output file that vehicle chassis part and vehicle body are determined under all limiting conditions includes：Judge institute
Whether the Eulerian angles for stating each vehicle chassis part and vehicle body in initial model are zero, and the vehicle being not zero for the Eulerian angles
Chassis part and vehicle body are established and vehicle coordinate system identical reference identification；Increase FEMDATA texts in the initial model
Part, the reference identification that the FEMDATA files use are identical with the vehicle coordinate system.
Because whether the Eulerian angles of vehicle chassis part and vehicle body are zero to directly affect vehicle chassis part and vehicle body
The Impact direction of output loads, therefore, the vehicle chassis part and vehicle body being not zero for Eulerian angles need to establish and vehicle
Coordinate identical reference identification so that vehicle chassis part and vehicle body load outbound course are identical with vehicle complete vehicle coordinate system.
Wherein, FEMDATA files are a kind of files of load output file.
Step S104, the initial model according to the modification analyzes the vehicle chassis part and vehicle body in each pole
The load under operating mode is limited, obtains the load output file suitable for finite element analysis, the load output file includes described whole
The load of chassis parts and vehicle body under all limiting conditions, and the load output file is FEM forms.
According to selected limiting condition, initial model corresponding to the selected limiting condition is changed, that is changed is initial
Model, the initial model of the modification is analyzed, obtains the load of vehicle chassis part and vehicle body under the selected limiting condition,
By analyzing the load of vehicle chassis part and vehicle body under each limiting condition, it is final obtain vehicle chassis part and
Load of the vehicle body under all limiting conditions, and the load of vehicle chassis part and vehicle body under all limiting conditions is with load
The form output of output file, the load output file applies to the file of finite element analysis, and the load output file is
The file of FEM forms.
The embodiment of the present invention establishes two analysis models according to the multi-body dynamics automobile model of target vehicle, and according to two
Individual analysis model is that each limiting condition selectes initial model, and its corresponding initial model is changed for selected limiting condition, and
The load of vehicle chassis part and vehicle body under all selected limiting conditions is analyzed, load is in the form of load output file
Output, it is not necessary to calculate the tire force under each limiting condition, it is not necessary to extract vehicle body load in the case where vehicle body is fixed, carry
Load extraction accuracy under high limiting condition, in addition, it is not necessary that establishing an analysis model for each limiting condition, is improved
Load extraction efficiency under limiting condition.
Fig. 2 is the structure chart of load extraction element under limiting condition provided in an embodiment of the present invention.The embodiment of the present invention carries
Load extraction element can perform the processing stream that the embodiment of the method that load is extracted under limiting condition provides under the limiting condition of confession
Journey, as shown in Fig. 2 load extraction element 20 establishes module 21, initial model determining module including analysis model under limiting condition
22nd, modified module 23, determining module 24 and output module 25, wherein, analysis model is established module 21 and is used for according to target vehicle
Multi-body dynamics automobile model establish the first analysis model and the second analysis model；Initial model determining module 22 is used for institute
The first analysis model or second analysis model are stated as initial model corresponding to each limiting condition；Modified module 23 is used for root
The initial model of the initial model acquisition modification is changed according to selected limiting condition；Determining module 24 is used to determine vehicle chassis
The load output file of parts and vehicle body under all limiting conditions；Output module 25 is used for the introductory die according to the modification
The load of vehicle chassis part described in type analysis and vehicle body under each limiting condition, obtain suitable for finite element analysis
Load output file, the load output file include the vehicle chassis part and vehicle body the load under all limiting conditions
Lotus, and the load output file is FEM forms.
The embodiment of the present invention establishes two analysis models according to the multi-body dynamics automobile model of target vehicle, and according to two
Individual analysis model is that each limiting condition selectes initial model, and its corresponding initial model is changed for selected limiting condition, and
The load of vehicle chassis part and vehicle body under all selected limiting conditions is analyzed, load is in the form of load output file
Output, it is not necessary to calculate the tire force under each limiting condition, it is not necessary to extract vehicle body load in the case where vehicle body is fixed, carry
Load extraction accuracy under high limiting condition, in addition, it is not necessary that establishing an analysis model for each limiting condition, is improved
Load extraction efficiency under limiting condition.
Fig. 3 is the structure chart of load extraction element under the limiting condition that another embodiment of the present invention provides.On Fig. 2 basis
On, load extraction element 20 also establishes module 26, vehicle many-body dynamics including multi-body dynamics automobile model under limiting condition
Model building module 26 is used for the multi-body dynamics automobile model for establishing the target vehicle；Multi-body dynamics automobile model is established
Module 26 is specifically used for the fore suspension and rear suspension model for establishing the target vehicle, and it is bent to analyze the KC that the fore suspension and rear suspension model obtains
The theoretical analysis result of line is with actual tests result to mark；The multi-body dynamics automobile model of the target vehicle is established, it is described
The front axle load of multi-body dynamics automobile model, rear axle load and vehicle height of center of mass meet preparatory condition, and the vehicle is more
Body dynamics model includes engine mockup.
The corresponding lateral and longitudinal acceleration of first analysis model is that the vehicle that zero, normal acceleration is 1.0G determines garden
Quasistatic operating mode；Second analysis model corresponds to initial velocity as 60 kilometers/hour, and plugging acceleration is 0.5G work
Condition；
All limiting conditions include 19 operating modes, wherein, the normal acceleration of operating mode 1 is 1.0G, operating mode 2 it is vertical
Acceleration is 3.5G, and the longitudinal impact power of operating mode 3 is 2G, and the side impacts of operating mode 4 are 2G, and the lateral right-hand bend of operating mode 5 is
1.2G, the longitudinally and laterally brakeing during cornereing of operating mode 6 is 0.74G, and the braking of operating mode 7 is 1.1G, and the plugging of operating mode 8 is
0.5G, the plugging of operating mode 9 is 1.0G, and the longitudinal acceleration of operating mode 10 is 0.5G, and the longitudinally and laterally turning of operating mode 11 adds
Speed is 0.45G, and the normal acceleration of the diagonal loading of operating mode 12 is 1.75G, and the normal acceleration of operating mode 13 is 2.5G,
The normal acceleration of operating mode 14 is 0.5G, and the lateral right-hand bend of operating mode 15 is 0.8G, and the lateral left-hand bend of operating mode 16 is 0.8G, work
The braking of condition 17 is 0.8G, and the longitudinal direction of operating mode 18 is -0.4G, and the longitudinal direction of operating mode 19 is 0.2G.
Second analysis model is the operating mode 8, the operating mode 9 and initial model corresponding to the operating mode 12, described first
Analysis model is initial model corresponding to the operating mode in addition to the operating mode 8, the operating mode 9 and the operating mode 12；
Modified module 23 is specifically used for increasing longitudinal 2G between tire and vehicle body in initial model corresponding to the operating mode 3
Power；Increase lateral 2G power between tire and vehicle body in initial model corresponding to the operating mode 4；First corresponding to the operating mode 12
Increase left front tire and right rear fire vertical drive in beginning model；In the operating mode 10, the operating mode 11, the operating mode 18 and institute
State increase tire driving torque in initial model corresponding to operating mode 19；In the operating mode 2, the operating mode 12, the and of the operating mode 13
Acceleration of gravity is changed according to normal acceleration in initial model corresponding to the operating mode 14；In the operating mode 10, the operating mode
18 and the operating mode 19 corresponding to initial velocity is changed in initial model is 20 kilometers/hour；In the operating mode 7 and the operating mode
It is 80 kilometers/hour that initial velocity is changed in initial model corresponding to 17；Changed in initial model corresponding to the operating mode 12
Initial velocity is zero.
Determining module 24 is specifically used for judging that the Eulerian angles of each vehicle chassis part and vehicle body in the initial model are
No is zero, and the vehicle chassis part and vehicle body being not zero for the Eulerian angles are established with vehicle coordinate system identical with reference to mark
Know；Increase FEMDATA files in the initial model, the reference identification that the FEMDATA files use is sat with the vehicle
Mark system is identical.
Load extraction element can be provided specifically for performing above-mentioned Fig. 1 under limiting condition provided in an embodiment of the present invention
Embodiment of the method, here is omitted for concrete function.
The embodiment of the present invention establishes two analysis models according to the multi-body dynamics automobile model of target vehicle, and according to two
Individual analysis model is that each limiting condition selectes initial model, and its corresponding initial model is changed for selected limiting condition, and
The load of vehicle chassis part and vehicle body under all selected limiting conditions is analyzed, load is in the form of load output file
Output, it is not necessary to calculate the tire force under each limiting condition, it is not necessary to extract vehicle body load in the case where vehicle body is fixed, carry
Load extraction accuracy under high limiting condition, in addition, it is not necessary that establishing an analysis model for each limiting condition, is improved
Load extraction efficiency under limiting condition.
In summary, the embodiment of the present invention establishes two analysis moulds according to the multi-body dynamics automobile model of target vehicle
Type, and be that each limiting condition selectes initial model according to two analysis models, changed for selected limiting condition corresponding to it
Initial model, and the load of vehicle chassis part and vehicle body under all selected limiting conditions is analyzed, load is defeated with load
Go out the form output of file, it is not necessary to calculate the tire force under each limiting condition, it is not necessary to carry in the case where vehicle body is fixed
Pick-up body load, improve load under limiting condition and extract accuracy, in addition, it is not necessary that establishing one point for each limiting condition
Model is analysed, improves load extraction efficiency under limiting condition.
In several embodiments provided by the present invention, it should be understood that disclosed apparatus and method, it can be passed through
Its mode is realized.For example, device embodiment described above is only schematical, for example, the division of the unit, only
Only a kind of division of logic function, there can be other dividing mode when actually realizing, such as multiple units or component can be tied
Another system is closed or is desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or discussed
Mutual coupling or direct-coupling or communication connection can be the INDIRECT COUPLINGs or logical by some interfaces, device or unit
Letter connection, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit
In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are causing a computer
It is each that equipment (can be personal computer, server, or network equipment etc.) or processor (processor) perform the present invention
The part steps of embodiment methods described.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (Read-
Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CD etc. it is various
Can be with the medium of store program codes.
Those skilled in the art can be understood that, for convenience and simplicity of description, only with above-mentioned each functional module
Division progress for example, in practical application, can be complete by different functional modules by above-mentioned function distribution as needed
Into the internal structure of device being divided into different functional modules, to complete all or part of function described above.On
The specific work process of the device of description is stated, the corresponding process in preceding method embodiment is may be referred to, will not be repeated here.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of method that load is extracted under limiting condition, it is characterised in that including：
Multi-body dynamics automobile model according to target vehicle establishes the first analysis model and the second analysis model；
Using first analysis model or second analysis model as initial model corresponding to each limiting condition；
The initial model is changed according to selected limiting condition and obtains the initial model of modification, and determines vehicle chassis part
And load output file of the vehicle body under all limiting conditions；
Initial model according to the modification analyzes the load of the vehicle chassis part and vehicle body under each limiting condition
Lotus, obtains the load output file suitable for finite element analysis, and the load output file includes the vehicle chassis part
And load of the vehicle body under all limiting conditions, and the load output file is FEM forms；
Wherein, the corresponding lateral and longitudinal acceleration of first analysis model is that the vehicle that zero, normal acceleration is 1.0G is determined
Garden quasistatic operating mode；Second analysis model corresponds to initial velocity as 60 kilometers/hour, and plugging acceleration is 0.5G's
Operating mode；All limiting conditions include 19 operating modes, wherein, the normal acceleration of operating mode 1 is 1.0G, and the vertical of operating mode 2 adds
Speed is 3.5G, and the longitudinal impact power of operating mode 3 is 2G, and the side impacts of operating mode 4 are 2G, and the lateral right-hand bend of operating mode 5 is
1.2G, the longitudinally and laterally brakeing during cornereing of operating mode 6 is 0.74G, and the braking of operating mode 7 is 1.1G, and the plugging of operating mode 8 is
0.5G, the plugging of operating mode 9 is 1.0G, and the longitudinal acceleration of operating mode 10 is 0.5G, and the longitudinally and laterally turning of operating mode 11 adds
Speed is 0.45G, and the normal acceleration of the diagonal loading of operating mode 12 is 1.75G, and the normal acceleration of operating mode 13 is 2.5G,
The normal acceleration of operating mode 14 is 0.5G, and the lateral right-hand bend of operating mode 15 is 0.8G, and the lateral left-hand bend of operating mode 16 is 0.8G, work
The braking of condition 17 is 0.8G, and the longitudinal direction of operating mode 18 is -0.4G, and the longitudinal direction of operating mode 19 is 0.2G.
2. according to the method for claim 1, it is characterised in that the multi-body dynamics automobile model according to target vehicle
Establish before the first analysis model and the second analysis model, in addition to：
Establish the multi-body dynamics automobile model of the target vehicle；
The multi-body dynamics automobile model for establishing the target vehicle includes：
The fore suspension and rear suspension model of the target vehicle is established, and analyzes the theory point for the KC curves that the fore suspension and rear suspension model obtains
Result is analysed with actual tests result to mark；
Establish the multi-body dynamics automobile model of the target vehicle, the front axle load of the multi-body dynamics automobile model, after
Axle load and vehicle height of center of mass meet preparatory condition, and the multi-body dynamics automobile model includes engine mockup.
3. according to the method for claim 1, it is characterised in that second analysis model is the operating mode 8, the operating mode
9 and the operating mode 12 corresponding to initial model, first analysis model be except the operating mode 8, the operating mode 9 and the operating mode
Initial model corresponding to operating mode outside 12；
The initial model that the selected limiting condition of the basis changes the initial model acquisition modification includes：
Increase longitudinal 2G power between tire and vehicle body in initial model corresponding to the operating mode 3；
Increase lateral 2G power between tire and vehicle body in initial model corresponding to the operating mode 4；
Increase left front tire and right rear fire vertical drive in initial model corresponding to the operating mode 12；
Increase tire in initial model corresponding to the operating mode 10, the operating mode 11, the operating mode 18 and the operating mode 19 to drive
Dynamic torque；
Accelerated in initial model corresponding to the operating mode 2, the operating mode 12, the operating mode 13 and the operating mode 14 according to vertical
Degree modification acceleration of gravity；
In initial model corresponding to the operating mode 10, the operating mode 18 and the operating mode 19 change initial velocity be 20 kilometers/
Hour；
It is 80 kilometers/hour that initial velocity is changed in initial model corresponding to the operating mode 7 and the operating mode 17；
It is zero that initial velocity is changed in initial model corresponding to the operating mode 12.
4. according to the method described in claim any one of 1-3, it is characterised in that the determination vehicle chassis part and vehicle body
Load output file under all limiting conditions includes：
Whether the Eulerian angles for judging each vehicle chassis part and vehicle body in the initial model are zero, and for the Eulerian angles not
The vehicle chassis part and vehicle body that are zero are established and vehicle coordinate system identical reference identification；
Increase FEMDATA files in the initial model, the reference identification that the FEMDATA files use is sat with the vehicle
Mark system is identical.
A kind of 5. load extraction element under limiting condition, it is characterised in that including：
Analysis model establishes module, for establishing the first analysis model and the according to the multi-body dynamics automobile model of target vehicle
Two analysis models；
Initial model determining module, for using first analysis model or second analysis model as each limiting condition pair
The initial model answered；
Modified module, the initial model changed is obtained for changing the initial model according to selected limiting condition；
Determining module, for determining the load output file of vehicle chassis part and vehicle body under all limiting conditions；
Output module, for analyzing the vehicle chassis part and vehicle body in each pole according to the initial model of the modification
The load under operating mode is limited, obtains the load output file suitable for finite element analysis, the load output file includes described whole
The load of chassis parts and vehicle body under all limiting conditions, and the load output file is FEM forms；
Wherein, the corresponding lateral and longitudinal acceleration of first analysis model is that the vehicle that zero, normal acceleration is 1.0G is determined
Garden quasistatic operating mode；Second analysis model corresponds to initial velocity as 60 kilometers/hour, and plugging acceleration is 0.5G's
Operating mode；All limiting conditions include 19 operating modes, wherein, the normal acceleration of operating mode 1 is 1.0G, and the vertical of operating mode 2 adds
Speed is 3.5G, and the longitudinal impact power of operating mode 3 is 2G, and the side impacts of operating mode 4 are 2G, and the lateral right-hand bend of operating mode 5 is
1.2G, the longitudinally and laterally brakeing during cornereing of operating mode 6 is 0.74G, and the braking of operating mode 7 is 1.1G, and the plugging of operating mode 8 is
0.5G, the plugging of operating mode 9 is 1.0G, and the longitudinal acceleration of operating mode 10 is 0.5G, and the longitudinally and laterally turning of operating mode 11 adds
Speed is 0.45G, and the normal acceleration of the diagonal loading of operating mode 12 is 1.75G, and the normal acceleration of operating mode 13 is 2.5G,
The normal acceleration of operating mode 14 is 0.5G, and the lateral right-hand bend of operating mode 15 is 0.8G, and the lateral left-hand bend of operating mode 16 is 0.8G, work
The braking of condition 17 is 0.8G, and the longitudinal direction of operating mode 18 is -0.4G, and the longitudinal direction of operating mode 19 is 0.2G.
6. load extraction element under limiting condition according to claim 5, it is characterised in that also include：
Multi-body dynamics automobile model establishes module, for establishing the multi-body dynamics automobile model of the target vehicle；
The multi-body dynamics automobile model establishes the fore suspension and rear suspension model that module is specifically used for establishing the target vehicle, and divides
The theoretical analysis results of the KC curves that the fore suspension and rear suspension model obtains is analysed with actual tests result to mark；Establish the target carriage
The multi-body dynamics automobile model of type, the front axle load of the multi-body dynamics automobile model, rear axle load and vehicle barycenter are high
Degree meets preparatory condition, and the multi-body dynamics automobile model includes engine mockup.
7. load extraction element under limiting condition according to claim 5, it is characterised in that second analysis model is
The operating mode 8, the operating mode 9 and initial model corresponding to the operating mode 12, first analysis model be except the operating mode 8,
Initial model corresponding to operating mode outside the operating mode 9 and the operating mode 12；
The modified module is specifically used for increasing longitudinal 2G between tire and vehicle body in initial model corresponding to the operating mode 3
Power；Increase lateral 2G power between tire and vehicle body in initial model corresponding to the operating mode 4；First corresponding to the operating mode 12
Increase left front tire and right rear fire vertical drive in beginning model；In the operating mode 10, the operating mode 11, the operating mode 18 and institute
State increase tire driving torque in initial model corresponding to operating mode 19；In the operating mode 2, the operating mode 12, the and of the operating mode 13
Acceleration of gravity is changed according to normal acceleration in initial model corresponding to the operating mode 14；In the operating mode 10, the operating mode
18 and the operating mode 19 corresponding to initial velocity is changed in initial model is 20 kilometers/hour；In the operating mode 7 and the operating mode
It is 80 kilometers/hour that initial velocity is changed in initial model corresponding to 17；Changed in initial model corresponding to the operating mode 12
Initial velocity is zero.
8. load extraction element under the limiting condition according to claim any one of 5-7, it is characterised in that the determination mould
Block is specifically used for judging whether the Eulerian angles of each vehicle chassis part and vehicle body in the initial model are zero, and is the Europe
Draw the vehicle chassis part and vehicle body is established and vehicle coordinate system identical reference identification that angle is not zero；In the initial model
Middle increase FEMDATA files, the reference identification that the FEMDATA files use are identical with the vehicle coordinate system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510068254.1A CN104615890B (en) | 2015-02-10 | 2015-02-10 | The method and device that load is extracted under limiting condition |
Applications Claiming Priority (1)
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| CN109918703A (en) * | 2019-01-10 | 2019-06-21 | 江苏理工学院 | A method of finite element analysis operating condition is quickly adjusted based on Shell language |
| CN112307589B (en) * | 2019-07-31 | 2023-11-14 | 比亚迪股份有限公司 | Unit working condition creation method and device, electronic equipment and storage medium |
| CN112329316B (en) * | 2020-11-19 | 2022-10-14 | 中国汽车技术研究中心有限公司 | Torsion beam strength analysis method based on multi-body dynamics |
| CN113239581A (en) * | 2021-04-02 | 2021-08-10 | 陕西同力重工股份有限公司 | Method for analyzing strength of frame of off-highway dump truck |
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