CN109635507A - Method for arranging based on the car damping piece that emulation is combined with experiment - Google Patents
Method for arranging based on the car damping piece that emulation is combined with experiment Download PDFInfo
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Abstract
The invention discloses the method for arranging and system of a kind of car damping piece combined based on emulation with experiment, belong to technical field of vehicle, method includes: to establish white body finite element model, interior cavity finite element model, damping fin finite element model to prototype vehicle, and white body finite element model, damping fin finite element model and interior cavity finite element model are carried out to the connection of computing unit by node, it obtains coupling finite element model and is verified；The original arrangement scheme of damping fin is provided, and the optimized criterion that damping fin may be implemented and increase or decrease is determined according to white body finite element model, coupling finite element model, adjustment is optimized to the original arrangement scheme until reaching preset optimization aim, to obtain the final arrangement of damping fin according to optimized criterion；The final arrangement of damping fin is subjected to experimental verification on prototype vehicle.Method provided in an embodiment of the present invention may help to user using least damping fin dosage and realize optimal effectiveness in vibration suppression.
Description
Technical field
The invention belongs to technical field of vehicle more particularly to a kind of cloth of the car damping piece combined based on emulation with experiment
Set method.
Background technique
During Automobile Body Design, in order to reinforce local metal plate, damping fin material is often used, generally
This damping fin is asphaltic base, and quality is larger, and the effect that reinforcement is formed on metal plate, vehicle body can be tightly solidificated in after heating
It is upper it is most be exactly at body platform, general dosage can all reach 15Kg or so.With automotive light weight technology trend and
It is required that how with less damping fin to realize preferable reinforcing effect, just at a problem, especially local metal plate reinforce and
Vehicle vibration noise is closely related, pursues reduction damping fin dosage simply and is possible to generate detrimental effects to vehicle vibration noise,
So how to balance between dosage optimization and effectiveness in vibration suppression, the designer of automobile industry annoying always, at present industry
There is no effective standard method for using for reference.Previous damping fin arrangement or be exactly to be pursued on a large scale using damping fin
Effectiveness in vibration suppression or be exactly copy previous generation vehicle either rival, do not have substantially for damping fin dosage and Vibration damping balance
It considers.
Summary of the invention
In order to solve problems in the prior art, the present invention provide it is a kind of based on emulation with test the car damping piece combined
Method for arranging, the means combined using simulation analysis with experimental analysis allow user of the invention can simplicity, standardization
Realize optimal effectiveness in vibration suppression with least damping fin dosage.
Specific technical solution provided in an embodiment of the present invention is as follows:
In a first aspect, the present invention provides a kind of method for arranging of car damping piece combined based on emulation with experiment, it is described
Method the following steps are included:
White body finite element model, interior cavity finite element model, damping fin finite element model are established to prototype vehicle, and will
The white body finite element model, damping fin finite element model and interior cavity finite element model carry out computing unit by node
Connection, obtain coupling and finite element model and verified；
The original arrangement scheme of damping fin is provided, and true according to the white body finite element model, coupling finite element model
Surely the optimized criterion that damping fin increases or decreases may be implemented, the original arrangement scheme is carried out according to the optimized criterion excellent
Change adjustment until reaching preset optimization aim, to obtain the final arrangement of damping fin；
The final arrangement of the damping fin is subjected to experimental verification on the prototype vehicle.
In some embodiments, it is described according to the white body finite element model, coupling finite element model determination can
To realize optimized criterion that damping fin increases or decreases, tune is optimized to the original arrangement scheme according to the optimized criterion
Straightening is to preset optimization aim is reached, so that the final arrangement for obtaining damping fin includes:
Respectively in the case where having damping operating condition and undamped working condition, to the coupling finite element model, white body finite element
Model carries out excitation emulation, obtains the acceleration frequence responses function under two kinds of operating conditions；
The acceleration frequence responses function is shown, is compared, thus respectively determine described in have damping operating condition under and
Screening criteria under undamped operating condition；
Corresponding characteristic frequency is determined according to the screening criteria, and Mode Shape, strain are obtained according to the characteristic frequency
The distribution map of Mode Shape and the displacement modes vibration shape identifies high energy region and Low Energy Region according to the distribution map, thus further really
Damping fin increases or decreases in the original arrangement scheme of the fixed damping fin, until it is adjusted to preset optimization aim, thus
Obtain the final arrangement of damping fin.
In some embodiments, described that white body finite element model, interior cavity finite element model, resistance are established to prototype vehicle
Buddhist nun's piece finite element model includes:
The white body finite element model is established to the prototype vehicle, it is imitative to carry out mode to the white body finite element model
Very, while on real vehicle white body mode experiment is carried out, the simulation result of the Modal Analysis and the white body mode is real
The experimental result tested compares, and verifies the correctness of the white body finite element model；
Car door finite element model is established to the prototype vehicle, by the car door finite element model and the white body finite element
Model combination constructs the interior cavity finite element model；
Establish the finite element model of monolithic damping fin and to the damping fin carry out fissipation factor experiment, by the loss because
The parameter that son experiment obtains is input in the finite element model of the monolithic damping fin, constructs physico damping fin finite element mould
Type.
In some embodiments, described that car door finite element model is established to the prototype vehicle, by the car door finite element mould
Type is combined with the white body finite element model, before the building interior cavity finite element model further include:
The white body finite element model is modified.
In some embodiments, described by the white body finite element model, damping fin finite element model and interior cavity
Finite element model by node carry out computing unit connection, obtain coupling finite element model and carry out verifying include:
Modal Analysis is carried out respectively to the white body finite element model and the interior cavity finite element model, it will be described
The simulation result of Modal Analysis constructs the coupling finite element model in conjunction with the damping fin finite element model；
Excitation emulation is carried out to the coupling finite element model, while carrying out frequency respond test on real vehicle, by the excitation
The simulation result of emulation and the experimental result of the frequency respond test compare, and verify the correct of the coupling finite element model
Property.
In some embodiments, described to carry out testing on the prototype vehicle by the final arrangement of the damping fin
Card includes:
According to the arrangement, damping fin is laid on the prototype vehicle, meanwhile, to being laid with described in damping fin
Prototype vehicle carries out white body floor mode contrast verification, floor oise insulation factor contrast verification and the comparison of vehicle vibration noise respectively and tests
Card, wherein the object of contrast verification is to mark vehicle.
Second aspect, the present invention provides a kind of arrangements based on the car damping piece combined based on emulation with experiment
The arrangement system of method, the system comprises:
Modeling module has for establishing white body finite element model, interior cavity finite element model, damping fin to prototype vehicle
Meta-model is limited, and the white body finite element model, damping fin finite element model and interior cavity finite element model are passed through into section
Point carries out the connection of computing unit, obtains coupling finite element model and is verified；
Damping fin optimizes authentication module, for providing the original arrangement scheme of damping fin, and it is limited according to the white body
The optimized criterion that damping fin increases or decreases may be implemented in meta-model, coupling finite element model determination, according to the optimized criterion
Adjustment is optimized to the original arrangement scheme until reaching preset optimization aim, to obtain the final arrangement of damping fin
Scheme；
Damping fin authentication module, for carrying out testing the final arrangement of the damping fin on the prototype vehicle
Card.
In some embodiments, the damping fin optimization module includes:
L-G simulation test module, for respectively have damping operating condition and undamped working condition under, to the coupling finite element
Model, white body finite element model carry out excitation emulation, obtain the acceleration frequence responses function under two kinds of operating conditions；
Criterion determining module, for being shown, being compared by the acceleration frequence responses function, to determine institute respectively
State the screening criteria under damping operating condition and under undamped operating condition；
Judgment module is obtained for determining corresponding characteristic frequency according to the screening criteria according to the characteristic frequency
The distribution map of Mode Shape, the strain mode vibration shape and the displacement modes vibration shape identifies high energy region and Low Energy Region according to the distribution map,
To further determine that increasing or decreasing for damping fin in the original arrangement scheme of the damping fin, until being adjusted to preset excellent
Change target, to obtain the final arrangement of damping fin.
In some embodiments, the modeling module includes:
White body finite element model is established and authentication module, for establishing the white body finite element mould to the prototype vehicle
Type carries out Modal Analysis to the white body finite element model, while carrying out white body mode experiment on real vehicle, by the mould
The simulation result of state emulation and the experimental result of the white body mode experiment compare, and verify the white body finite element mould
The correctness of type；
Interior cavity finite element model establishes module, will be described for establishing car door finite element model to the prototype vehicle
Car door finite element model is combined with the white body finite element model, constructs the interior cavity finite element model；
Damping fin finite element model establishes module, for establishing the finite element model of monolithic damping fin and to the damping fin
Fissipation factor experiment is carried out, the parameter that the fissipation factor is tested is input to the finite element model of the monolithic damping fin
In, construct physico damping fin finite element model.
In some embodiments, the modeling module further include:
Finite element model foundation and authentication module are coupled, for the white body finite element model and the interior cavity
Finite element model carries out Modal Analysis respectively, by the simulation result of the Modal Analysis in conjunction with the damping fin finite element model,
Construct the coupling finite element model；And excitation emulation is carried out to the coupling finite element model, while in the enterprising line frequency of real vehicle
Experiment is rung, the experimental result of the simulation result and the frequency respond test of the excitation emulation is compared, the coupling is verified
The correctness of finite element model.
The embodiment of the present invention has the following beneficial effects:
1, the present invention can greatly save the cost, traditional method at least need 3-4 wheel optimization verifying, this means that
4 or so white bodies and vehicle resources are needed, the present invention only needs 1 white body and vehicle；
2, the present invention greatly shortens the period, and conventional method forms final arrangement and at least needs 3 months or so, this
Invention only needs 1 month；
3, the present invention standardizes damping fin placement process, grasps and uses convenient for practitioner, greatly reduces this
The difficulty and threshold of work；
4, present invention uses the principle of subsequent iteration optimization, the extensive style compared to conventional method is arranged, can be maximum
The balance of limit guaranteed between damping fin dosage and damping property.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the process of the method for arranging of the car damping piece combined based on emulation with experiment in the embodiment of the present invention one
Figure；
Fig. 2 is the frame of the arrangement system of the car damping piece combined based on emulation with experiment in the embodiment of the present invention one
Figure.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached in the embodiment of the present invention
Figure, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only this
Invention a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment one
Fig. 1 is the process according to the method for arranging of the car damping piece combined based on emulation with experiment shown in embodiment one
Figure, shown referring to Fig.1, this method comprises the following steps:
S1, white body finite element model, interior cavity finite element model, damping fin finite element model are established to prototype vehicle,
And white body finite element model, damping fin finite element model and interior cavity finite element model are subjected to computing unit by node
Connection, obtain coupling and finite element model and verified.
The step includes:
S11, white body finite element model is established to prototype vehicle and is verified, meanwhile, establish interior cavity finite element mould
Type and establish damping fin finite element model.
Include:
A, white body finite element model is established to prototype vehicle, to white body finite element model progress Modal Analysis, while
White body mode experiment is carried out on real vehicle, and the experimental result of the simulation result of Modal Analysis and white body mode experiment is carried out pair
Than verifying the correctness of white body finite element model.
Specifically, needing first to establish the threedimensional model of white body before establishing white body finite element model, by threedimensional model
It is directed into the division that finite element grid is carried out in Hypermesh software, wherein it should be noted that grid matter during grid dividing
The control of amount, grid dividing finish i.e. white body finite element model and establish completion.It should be noted that white body at this time is limited
Damping fin model is not included in meta-model.
In order to verify whether white body finite element model is correct, need to carry out the white body finite element model for establishing completion
Simulation calculation.In the present embodiment, ready-portioned white body finite element grid data are imported into Nastran software carry out it is white
Body mode calculates and obtains the Modal Analysis result of first five rank and the vibration shape of each order；Meanwhile for the white vehicle of prototype vehicle
Body carries out mode experiment, obtains the calculated result in 500Hz, pays close attention to the vehicle modal frequency and each order of first five rank
The vibration shape.The experimental result of the simulation result of white body finite element model and prototype vehicle, which is compared, can verify that white body is limited
The correctness of meta-model.
Wherein, when comparing, the interior general standard that chooses a trade is judged, it may be assumed that real under same Mode Shape
The modal frequency difference of result and simulation result is tested less than 5%.
When experimental result and the modal frequency difference of simulation result are greater than 5%, need to adjust white body finite element model
Quality and boundary condition, the tolerance standards until reaching 5%.
B, car door finite element model is established to prototype vehicle, combines car door finite element model with white body finite element model,
Construct interior cavity finite element model.
Before constructing interior cavity finite element model, need to modify white body finite element model.Specifically,
White body finite element grid is modified in Hypermesh software, fills up too small cavity, trims too small wedge angle, is adjusted
The grid of deformity.After the completion of finishing, establish car door finite element model, at the same by car door finite element mesh model with it is white after finishing
Vehicle body finite element model is assembled, and the white body after finishing is connected into one completely continuously with car door mold inner surfaces
Surface divides the finite element grid of interior cavity enveloping solid, to construct interior cavity finite element model.
C, it establishes the finite element model of monolithic damping fin and fissipation factor experiment is carried out to damping fin, fissipation factor is tested
Obtained parameter is input in the finite element model of monolithic damping fin, constructs physico damping fin finite element model.
Specifically, needing first to establish the threedimensional model of damping fin before establishing damping fin finite element model, monolithic being damped
The threedimensional model of piece is directed into the division that finite element grid is carried out in Hypermesh software, that is, establishes damping fin finite element mould
Type, wherein due to the relative shape comparison rule of damping fin, mesh quality requires to need higher when dividing, and needs
The quantity that promote grid as far as possible according to the computing capability of computer used assigns ready-portioned finite element grid to perimeter strip
Part, to construct physico damping fin finite element model.
Wherein, boundary condition includes the basic informations such as damping fin density, Poisson's ratio, elasticity modulus.In order to obtain such base
Plinth information needs to carry out fissipation factor experiment to damping fin, to obtain the fissipation factor parameter of damping fin, fissipation factor parameter
Including basic informations such as damping fin density, Poisson's ratio, elasticity modulus.
In the present embodiment, assigning ready-portioned finite element grid to boundary condition is to be input to fissipation factor parameter
In the finite element model of damping fin, in this way, just completing the building of physico damping fin finite element model.
S12, by white body finite element model, damping fin finite element model and interior cavity finite element model by node into
The connection of row computing unit obtains coupling finite element model and is verified.
Include:
A, Modal Analysis is carried out respectively to white body finite element model and interior cavity finite element model, by Modal Analysis
Simulation result combination damping fin finite element model, building coupling finite element model.
Specifically, the white body finite element model constructed in above-mentioned steps S11 is carried out Modal Analysis, obtained
The Modal Analysis result of first five rank；Meanwhile interior cavity finite element model is subjected to Modal Analysis, obtain the meter within 600Hz
Calculate result.By the result input of the result of white body finite element model Modal Analysis and interior cavity finite element model Modal Analysis
Into Actran software, and by the synchronous importing of physico finite element model in step S11, coupling is established in Actran software
Close finite element model.
B, excitation emulation is carried out to coupling finite element model, while carries out frequency respond test on real vehicle, by excitation emulation
The experimental result of simulation result and frequency respond test compares, the correctness of verifying coupling finite element model.
For coupling finite element model, apply unit excitation at vehicle body hard spot, and bent in response dot picking frequency response function
Line.Wherein, it in the present embodiment, selects to locate in response in 13 vehicle body hard spots as 6 driving source, selection vehicle body response points.
Meanwhile frequency response function measurement experiment is carried out for real vehicle, obtain test frequency response result.Contrast simulation is obtained with experiment
The frequency response that takes as a result, and coupling finite element model is verified using 5% as tolerance judgment criteria, such as larger than 5%, then carry out
Adjustment, until meeting tolerance standards.
S2, the original arrangement scheme of damping fin is provided, and is determined according to white body finite element model, coupling finite element model
The optimized criterion that damping fin increases or decreases may be implemented, according to optimized criterion to original arrangement scheme optimize adjustment until
Reach preset optimization aim, to obtain the final arrangement of damping fin.
Specifically, rule of thumb, it is first determined the original arrangement scheme of a damping fin, later in conjunction with white body finite element
Model, coupling finite element model determine the optimized criterion of damping fin, using the optimized criterion of damping fin as constraint condition, to original
Arrangement optimizes adjustment, meanwhile, the subduction target (such as: the 29% of loss of weight gross mass) of damping fin is set, is hindered when meeting
When the subduction target of Buddhist nun's piece, Optimized Iterative cut-off obtains the final arrangement of damping fin at this time.
Wherein, determine that the optimized criterion of damping fin includes: in conjunction with white body finite element model, coupling finite element model
A, respectively in the case where having damping operating condition and undamped working condition, to coupling finite element model, white body finite element mould
Type carries out excitation emulation, obtains the acceleration frequence responses function under two kinds of operating conditions.
B, all acceleration frequence responses functions shown, are compared, thus respectively determine have damping operating condition under and nothing
Damp the screening criteria under operating condition.
Acceleration frequence responses function all obtained in above-mentioned steps is put together and compares display, and by nothing
Acceleration frequence responses value 1500mm/s under damping state2With the acceleration frequence responses value 600mm/s having under damping state2Make
For screening criteria.
In addition, adjustment is optimized to original arrangement scheme using the optimized criterion of damping fin as constraint condition, meanwhile,
The subduction target for setting damping fin, when meeting the subduction target of damping fin, Optimized Iterative cut-off obtains damping fin most at this time
Whole arrangement includes:
A, corresponding characteristic frequency is determined according to screening criteria, Mode Shape is obtained according to characteristic frequency, strain mode is shaken
The distribution map of type and the displacement modes vibration shape identifies high energy region and Low Energy Region according to distribution map, to further determine that damping fin
Damping fin increases or decreases in original arrangement scheme, until subduction target is adjusted to, to obtain the final arrangement of damping fin
Scheme.
Specifically, high energy region increases damping fin, damping fin is reduced in Low Energy Region, in this way, just obtaining whole
Where a white body needs to arrange, where does not need to arrange, to obtain the arrangement of damping fin.
S3, the final arrangement of damping fin is subjected to experimental verification on prototype vehicle.
Specifically, damping fin is laid on prototype vehicle according to final arrangement, meanwhile, to being laid with damping fin
Prototype vehicle carries out white body floor mode contrast verification, floor oise insulation factor contrast verification and the comparison of vehicle vibration noise respectively and tests
Card, wherein the object of contrast verification is to mark vehicle.In this way, can be verified to the effectiveness in vibration suppression of final arrangement.
Fig. 2 is the frame according to a kind of arrangement system for the car damping piece combined based on emulation with experiment for implementing to exemplify
Figure, as shown in Fig. 2, the system 2 includes:
Modeling module 21, for establishing white body finite element model, interior cavity finite element model, damping fin to prototype vehicle
Finite element model, and white body finite element model, damping fin finite element model and interior cavity finite element model are passed through into node
The connection for carrying out computing unit obtains coupling finite element model and is verified.Modeling module 21 includes white body finite element mould
Type foundation and authentication module 211, interior cavity finite element model establishes module 212, damping fin finite element model establishes module
213, coupling finite element model is established and authentication module 214.
White body finite element model is established and authentication module 211, right for establishing white body finite element model to prototype vehicle
White body finite element model carries out Modal Analysis, while white body mode experiment is carried out on real vehicle, by the emulation of Modal Analysis
As a result the experimental result with white body mode experiment compares, and verifies the correctness of white body finite element model.
Interior cavity finite element model establishes module 212, and for establishing car door finite element model to prototype vehicle, car door is had
Limit meta-model is combined with white body finite element model, constructs interior cavity finite element model.
Damping fin finite element model establishes module 213, for establishing the finite element model of monolithic damping fin and to damping fin
Fissipation factor experiment is carried out, the parameter that fissipation factor is tested is input in the finite element model of monolithic damping fin, is constructed
Physico damping fin finite element model.
Coupling finite element model establishes module 214, for white body finite element model and interior cavity finite element model
Modal Analysis is carried out respectively, by the simulation result of Modal Analysis in conjunction with the damping fin finite element model, building coupling finite element
Model；And excitation emulation is carried out to coupling finite element model, while frequency respond test is carried out on real vehicle, by the emulation of excitation emulation
As a result it is compared with the experimental result of frequency respond test, the correctness of verifying coupling finite element model.
Damping fin optimization module 22, for providing the original arrangement scheme of damping fin, and according to the white body finite element
The optimized criterion that damping fin increases or decreases may be implemented in model, coupling finite element model determination, according to the optimized criterion pair
The original arrangement scheme optimizes adjustment until reaching preset optimization aim, to obtain the final arrangement side of damping fin
Case.It includes l-G simulation test module 221, criterion determining module 222 and judgment module 223 that damping fin, which optimizes authentication module 22:
L-G simulation test module 221, for have damping operating condition and undamped working condition under, to coupling finite element model into
Row energization emulation, obtains the acceleration frequence responses function under two kinds of operating conditions.
Criterion determining module 222, for being shown, being compared by acceleration frequence responses function, to determine institute respectively
State the screening criteria under damping operating condition and under undamped operating condition.
Judgment module 223 obtains mode vibration according to characteristic frequency for determining corresponding characteristic frequency according to screening criteria
The distribution map of type, the strain mode vibration shape and the displacement modes vibration shape identifies high energy region and Low Energy Region according to distribution map, thus further
Increasing or decreasing for damping fin in the original arrangement scheme of damping fin is determined, until preset optimization aim is adjusted to, to obtain
Obtain the final arrangement of damping fin.
Damping fin authentication module 23 is passed for arranging on to mark vehicle and the vehicle to be matched for adding tire to be matched
Sensor.
In the present embodiment it is a kind of for realizing the arrangement system of car damping piece combined based on emulation with experiment and
The specific implementation process and technical effect of above method embodiment are consistent, and details are not described herein again.
Although the preferred embodiment in the embodiment of the present invention has been described, once a person skilled in the art knows
Basic creative concept, then additional changes and modifications may be made to these embodiments.So appended claims are intended to explain
Being includes preferred embodiment and all change and modification for falling into range in the embodiment of the present invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. the method for arranging based on the car damping piece that emulation is combined with experiment, which is characterized in that the method includes following steps
It is rapid:
White body finite element model, interior cavity finite element model, damping fin finite element model are established to prototype vehicle, and will be described
White body finite element model, damping fin finite element model and interior cavity finite element model carry out the company of computing unit by node
It connects, obtain coupling finite element model and is verified；
There is provided damping fin original arrangement scheme, and according to the white body finite element model, coupling finite element model determination can
To realize optimized criterion that damping fin increases or decreases, tune is optimized to the original arrangement scheme according to the optimized criterion
Straightening is to preset optimization aim is reached, to obtain the final arrangement of damping fin；
The final arrangement of the damping fin is subjected to experimental verification on the prototype vehicle.
2. the method according to claim 1, wherein it is described according to the white body finite element model, be coupled with
The optimized criterion that damping fin increases or decreases may be implemented in limit meta-model determination, according to the optimized criterion to the original arrangement
Scheme optimizes adjustment until reaching preset optimization aim, so that the final arrangement for obtaining damping fin includes:
Respectively in the case where having damping operating condition and undamped working condition, to the coupling finite element model, white body finite element model
Excitation emulation is carried out, the acceleration frequence responses function under two kinds of operating conditions is obtained；
All acceleration frequence responses functions are shown, are compared, thus respectively determine described in have damping operating condition under and
Screening criteria under undamped operating condition；
Corresponding characteristic frequency is determined according to the screening criteria, and Mode Shape, strain mode are obtained according to the characteristic frequency
The distribution map of the vibration shape and the displacement modes vibration shape identifies high energy region and Low Energy Region according to the distribution map, to further determine that institute
Increasing or decreasing for damping fin in the original arrangement scheme of damping fin is stated, until preset optimization aim is adjusted to, to obtain
The final arrangement of damping fin.
3. the method according to claim 1, wherein described establish white body finite element model, vehicle to prototype vehicle
Internal cavity finite element model, damping fin finite element model include:
The white body finite element model is established to the prototype vehicle, Modal Analysis is carried out to the white body finite element model,
White body mode experiment is carried out on real vehicle simultaneously, by the simulation result of the Modal Analysis and the white body mode experiment
Experimental result compares, and verifies the correctness of the white body finite element model；
Car door finite element model is established to the prototype vehicle, by the car door finite element model and the white body finite element model
Combination constructs the interior cavity finite element model；
It establishes the finite element model of monolithic damping fin and fissipation factor experiment is carried out to the damping fin, the fissipation factor is real
The parameter tested is input in the finite element model of the monolithic damping fin, constructs physico damping fin finite element model.
4. according to the method described in claim 3, it is characterized in that, described establish car door finite element model to the prototype vehicle,
It combines the car door finite element model with the white body finite element model, before the building interior cavity finite element model
Further include:
The white body finite element model is modified.
5. the method according to claim 1, wherein described have the white body finite element model, damping fin
It limits meta-model and interior cavity finite element model carries out the connection of computing unit by node, obtain coupling finite element model and go forward side by side
Row is verified
Modal Analysis is carried out respectively to the white body finite element model and the interior cavity finite element model, by the mode
The simulation result of emulation constructs the coupling finite element model in conjunction with the damping fin finite element model；
Excitation emulation is carried out to the coupling finite element model, while carrying out frequency respond test on real vehicle, the excitation is emulated
The experimental result of simulation result and the frequency respond test compare, verify the correctness of the coupling finite element model.
6. method described in any one according to claim 1~5, which is characterized in that the final cloth by the damping fin
It sets scheme and carries out experimental verification on the prototype vehicle and include:
According to the arrangement, damping fin is laid on the prototype vehicle, meanwhile, to the prototype for being laid with damping fin
Vehicle carries out white body floor mode contrast verification, floor oise insulation factor contrast verification and vehicle vibration noise contrast verification respectively,
In, the object of contrast verification is to mark vehicle.
7. a kind of arrangement based on the car damping piece combined based on emulation with experiment described in claim 1~6 any one
The system of method, which is characterized in that the system comprises:
Modeling module, for establishing white body finite element model, interior cavity finite element model, damping fin finite element to prototype vehicle
Model, and by the white body finite element model, damping fin finite element model and interior cavity finite element model by node into
The connection of row computing unit obtains coupling finite element model and is verified；
Damping fin optimization module, for providing the original arrangement scheme of damping fin, and according to the white body finite element model, coupling
Closing finite element model determination may be implemented the optimized criterion that damping fin increases or decreases, according to the optimized criterion to described original
Arrangement optimizes adjustment until reaching preset optimization aim, to obtain the final arrangement of damping fin；
Damping fin authentication module, for the final arrangement of the damping fin to be carried out experimental verification on the prototype vehicle.
8. system according to claim 7, which is characterized in that the damping fin optimization module includes:
L-G simulation test module, for respectively have damping operating condition and undamped working condition under, to the coupling finite element model,
White body finite element model carries out excitation emulation, obtains the acceleration frequence responses function under two kinds of operating conditions；
Criterion determining module, for being shown, being compared by the acceleration frequence responses function, to have described in determining respectively
Damp the screening criteria under operating condition and under undamped operating condition；
Judgment module obtains mode according to the characteristic frequency for determining corresponding characteristic frequency according to the screening criteria
The distribution map of the vibration shape, the strain mode vibration shape and the displacement modes vibration shape identifies high energy region and Low Energy Region according to the distribution map, thus
Increasing or decreasing for damping fin in the original arrangement scheme of the damping fin is further determined that, until being adjusted to preset optimization mesh
Mark, to obtain the final arrangement of damping fin.
9. system according to claim 7, which is characterized in that the modeling module includes:
White body finite element model is established and authentication module, for establishing the white body finite element model to the prototype vehicle,
Modal Analysis is carried out to the white body finite element model, while carrying out white body mode experiment on real vehicle, by the mode
The simulation result of emulation and the experimental result of the white body mode experiment compare, and verify the white body finite element model
Correctness；
Interior cavity finite element model establishes module, for establishing car door finite element model to the prototype vehicle, by the car door
Finite element model is combined with the white body finite element model, constructs the interior cavity finite element model；
Damping fin finite element model establishes module, for establishing the finite element model of monolithic damping fin and carrying out to the damping fin
Fissipation factor experiment, the parameter that the fissipation factor is tested is input in the finite element model of the monolithic damping fin,
Construct physico damping fin finite element model.
10. system according to claim 7, feature is for fear of the modeling module further include:
Finite element model foundation and authentication module are coupled, for limited to the white body finite element model and the interior cavity
Meta-model carries out Modal Analysis respectively, by the simulation result of the Modal Analysis in conjunction with the damping fin finite element model, building
The coupling finite element model；And excitation emulation is carried out to the coupling finite element model, while ringing in fact in the enterprising line frequency of real vehicle
It tests, the experimental result of the simulation result and the frequency respond test of the excitation emulation is compared, it is limited to verify the coupling
The correctness of meta-model.
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