CN109960877A - The analysis method and system of automobile batteries bag support intensity - Google Patents
The analysis method and system of automobile batteries bag support intensity Download PDFInfo
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- CN109960877A CN109960877A CN201910229032.1A CN201910229032A CN109960877A CN 109960877 A CN109960877 A CN 109960877A CN 201910229032 A CN201910229032 A CN 201910229032A CN 109960877 A CN109960877 A CN 109960877A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
Abstract
The present invention relates to the analysis methods and system of automobile batteries bag support intensity, and described method includes following steps: the spectrum acquisition of acceleration road are carried out to battery bag support, to obtain the maximum actual measureed value of acceleration of battery bag support；To finite element analysis is carried out in automobile frame system, to obtain corresponding peak response acceleration, wherein automobile frame system includes automobile frame, the battery bag support on automobile frame and the battery pack in battery bag support；Road excitation value is obtained according to maximum actual measureed value of acceleration and peak response acceleration calculation, and corresponding load boundary value is calculated according to road excitation value.Reasonable load boundary value can be calculated in the analysis method of automobile batteries bag support intensity proposed by the present invention, to improve the potentiality optimized to battery bag support lightweight.
Description
Technical field
The present invention relates to automobile technical field, in particular to the analysis method of a kind of automobile batteries bag support intensity and it is
System.
Background technique
With the development of economy with the progress of technology, city dweller's car ownership rapidly increasing, road traffic accident
Have become one of the important threat of human life's safety.Therefore the general safety performance for how improving automobile, has become
The most important research direction of automobile engineer.
For new energy truck, battery pack mounting bracket assembly is an important component in vehicle.New energy
For source truck batteries packet mounting bracket assembly as one of body assembly, major function is fixed accumulator plant, to guarantee to store
Battery is that automobile normal running and interior electronic system operate normally power supply.Since the weight of battery bag support is more than 100kg, because
This needs to carry out light-weight technologg to it.It realizes light-weighted approach, usually uses Optimal Structure Designing technology, that is, guarantee strong
The constant progress structure optimization of performance is spent to carry out loss of weight.Currently, most of company carries out road spectrum acquisition, glued on battery bag support
Acceleration transducer is pasted, the peak acceleration of acquisition is come directly as intensity operating condition input condition, then in finite element model
Middle progress carries out gravity field analysis with peak acceleration.
However, this method ignores battery pack using the absolute acceleration of the battery bag support of measurement as boundary condition
Bracket is actually the motion characteristics together with suspension, not using the relative acceleration of battery bag support and vehicle frame as side
Boundary's condition, but using the absolute acceleration in battery bag support relatively face as boundary condition, cause the work condition environment of simulation with
Actual deviation is larger, is unfavorable for the processing of lightweight analysis optimization.
Summary of the invention
The intensive analysis of automobile batteries bag support is being carried out the purpose of the present invention is to solve in the prior art based on this
When, not using the relative acceleration of battery bag support and vehicle frame as boundary condition, but with battery bag support relatively face
Absolute acceleration causes the work condition environment of simulation larger with actual deviation, is unfavorable for lightweight analysis optimization as boundary condition
The problem of processing.
The present invention proposes a kind of analysis method of automobile batteries bag support intensity, wherein described method includes following steps:
The spectrum acquisition of acceleration road is carried out to the battery bag support, is accelerated with obtaining the maximum actual measurement of the battery bag support
Degree；
To finite element analysis is carried out in automobile frame system, to obtain corresponding peak response acceleration, wherein the vapour
Vehicle carriage system includes automobile frame, the battery bag support on the automobile frame and is set in the battery bag support
Battery pack；
Road excitation value is obtained according to the maximum actual measureed value of acceleration and the peak response acceleration calculation, and according to
Corresponding load boundary value is calculated in the road excitation value.
The analysis method of automobile batteries bag support intensity proposed by the present invention carries out acceleration road spectrum to automobile first and adopts
Collection, namely data actual measurement is carried out, the maximum actual measureed value of acceleration of the battery bag support is obtained, is then had to the foundation of automobile frame system
It limits meta-model and carries out digital simulation, frequency response excitation is applied to automobile frame system, obtains corresponding peak response acceleration,
Road excitation value is obtained further according to above-mentioned maximum actual measureed value of acceleration and peak response acceleration calculation, to be finally calculated
The suitable load boundary value of battery bag support.Due in the present invention, avoiding the maximum actual measureed value of acceleration that will be surveyed
As boundary condition, but by data processing, using the relative acceleration of battery bag support and automobile frame as boundary condition,
Therefore it is more reasonable credible that load boundary value is calculated, to improve the potentiality optimized to battery bag support lightweight.
The analysis method of the automobile batteries bag support intensity, wherein the maximum actual measureed value of acceleration includes the direction x maximum
Actual measureed value of acceleration, the direction y maximum actual measureed value of acceleration and the direction z maximum actual measureed value of acceleration, the peak response acceleration includes x
Direction peak response acceleration, the direction y peak response acceleration and the direction z peak response acceleration.
The analysis method of the automobile batteries bag support intensity, wherein described to carrying out finite element in automobile frame system
Analysis, includes the following steps: in the method for obtaining corresponding peak response acceleration
Establish automobile frame system finite element model；
Apply frequency response excitation, between the automobile frame and automobile chassis to obtain the institute of the battery bag support
State peak response acceleration.
The analysis method of the automobile batteries bag support intensity, wherein it is described according to the maximum actual measureed value of acceleration and
The peak response acceleration calculation obtains road excitation value, and corresponding load side is calculated according to the road excitation value
The method of dividing value includes the following steps:
The maximum actual measureed value of acceleration is obtained into the road excitation value divided by the peak response acceleration；
The road excitation value is obtained into the load boundary value multiplied by safety coefficient.
The analysis method of the automobile batteries bag support intensity, wherein the range of frequency response excitation is 1~
1.2g, the range of the safety coefficient are 1.25~1.35.
The present invention also proposes a kind of analysis system of automobile batteries bag support intensity, wherein includes:
Data acquisition module, for carrying out the spectrum acquisition of acceleration road to the battery bag support, to obtain the battery pack
The maximum actual measureed value of acceleration of bracket；
Modeling analysis module, for finite element analysis is carried out in automobile frame system, to obtain corresponding peak response
Acceleration, wherein the automobile frame system includes automobile frame, the battery bag support on the automobile frame and sets
Battery pack in the battery bag support；
Confirmation module is calculated, for obtaining according to the maximum actual measureed value of acceleration and the peak response acceleration calculation
Road excitation value, and corresponding load boundary value is calculated according to the road excitation value.
The analysis system of the automobile batteries bag support intensity, wherein the maximum actual measureed value of acceleration includes the direction x maximum
Actual measureed value of acceleration, the direction y maximum actual measureed value of acceleration and the direction z maximum actual measureed value of acceleration, the peak response acceleration includes x
Direction peak response acceleration, the direction y peak response acceleration and the direction z peak response acceleration.
The analysis system of the automobile batteries bag support intensity, wherein the modeling analysis module includes:
Model foundation unit, for establishing automobile frame system finite element model；
Applying unit is motivated, for applying frequency response excitation between the automobile frame and automobile chassis, to obtain
The peak response acceleration of the battery bag support.
The analysis system of the automobile batteries bag support intensity, wherein the calculating confirmation module includes:
First computing unit, it is described for obtaining the maximum actual measureed value of acceleration divided by the peak response acceleration
Road excitation value；
Second computing unit, for the road excitation value to be obtained the load boundary value multiplied by safety coefficient.
The analysis system of the automobile batteries bag support intensity, wherein the range of frequency response excitation is 1~
1.2g, the range of the safety coefficient are 1.25~1.35.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the flow chart of the analysis method for the automobile batteries bag support intensity that first embodiment of the invention proposes；
Fig. 2 is the flow chart of the analysis method for the automobile batteries bag support intensity that second embodiment of the invention proposes；
Fig. 3 is the spectrogram of maximum actual measureed value of acceleration in second embodiment of the invention；
Fig. 4 is the structural schematic diagram for the finite element model established in second embodiment of the invention；
Fig. 5 is the peak acceleration in the direction x obtained in second embodiment of the invention through finite element analysis；
Fig. 6 is the structural schematic diagram of the analysis system for the automobile batteries bag support intensity that third embodiment of the invention proposes；
Fig. 7 is the structural schematic diagram of the analysis system for the automobile batteries bag support intensity that fourth embodiment of the invention proposes.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give preferred embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more phases
Any and all combinations of the listed item of pass.
Currently, most of company carries out road spectrum acquisition, acceleration transducer is pasted on battery bag support, most by acquisition
High acceleration comes directly as intensity operating condition input condition, then carries out carrying out gravity with peak acceleration in finite element model
Field analysis.
However, this method ignores battery pack using the absolute acceleration of the battery bag support of measurement as boundary condition
Bracket is actually the motion characteristics together with suspension, not using the relative acceleration of battery bag support and vehicle frame as side
Boundary's condition, but using the absolute acceleration in battery bag support relatively face as boundary condition, cause the work condition environment of simulation with
Actual deviation is larger, is unfavorable for the processing of lightweight analysis optimization.
In order to solve this technical problem, the present invention proposes a kind of analysis method of automobile batteries bag support intensity, please join
Fig. 1 is read, for the analysis method for the automobile batteries bag support intensity that first embodiment of the invention proposes, the method includes as follows
Step:
S101 carries out the spectrum acquisition of acceleration road to the battery bag support, real with the maximum for obtaining the battery bag support
Measuring acceleration.
For automobile, including automobile frame, battery bag support is equipped on the automobile frame.It should be understood that in electricity
One battery pack is installed in the bag support of pond.In this step, the spectrum acquisition of acceleration road is carried out to battery bag support, namely carries out road
Spectrum actual measurement operation, obtains the maximum actual measureed value of acceleration of battery bag support.
In this respect it is to be noted that above-mentioned maximum actual measureed value of acceleration refers to the maximum in the direction x, the direction y and the direction z
Actual measureed value of acceleration.In addition, when choosing acceleration analysis point, need to guarantee in battery bag support or so for battery bag support
It is chosen monosymmetric position.
S102, to finite element analysis is carried out in automobile frame system, to obtain corresponding peak response acceleration, wherein institute
State automobile frame system include automobile frame, the battery bag support on the automobile frame and be set to the battery pack branch
Battery pack in frame.
After actual measurement has obtained the maximum actual measureed value of acceleration of each test point of battery bag support, in this step, to automobile
Frame system and frame carries out finite element analysis, applies frequency response excitation to the finite element model established, to obtain the vehicle frame system
The peak acceleration that battery bag support responds in system.Peak acceleration herein is peak response acceleration, is quasi- by model
The theoretical value that building obtains is closed, and the theoretical value is compared with the maximum actual measureed value of acceleration in step S101, to obtain more
For accurate load boundary condition.
S103 obtains road excitation value according to the maximum actual measureed value of acceleration and the peak response acceleration calculation,
And corresponding load boundary value is calculated according to the road excitation value.
Further, after the maximum actual measureed value of acceleration and peak response acceleration for having obtained battery bag support,
In this step, a road surface excitation value is obtained according to maximum actual measureed value of acceleration and peak response acceleration calculation.Specifically, will most
Big actual measureed value of acceleration obtains above-mentioned road excitation value divided by peak response acceleration.In order to improve the peace of automobile batteries bag support
Overall coefficient, multiplied by a safety coefficient on the basis of road excitation value, obtains pair after the road excitation value being calculated
The load boundary value answered.And standard, Er Feixian are produced using the load boundary value being calculated as the load of battery bag support
Have in technology, the maximum actual measureed value of acceleration for the battery bag support for directly obtaining actual measurement improves safety as safety standard
Energy.
The analysis method of automobile batteries bag support intensity proposed by the present invention carries out acceleration road spectrum to automobile first and adopts
Collection, namely data actual measurement is carried out, the maximum actual measureed value of acceleration of the battery bag support is obtained, is then had to the foundation of automobile frame system
It limits meta-model and carries out digital simulation, frequency response excitation is applied to automobile frame system, obtains corresponding peak response acceleration,
Road excitation value is obtained further according to above-mentioned maximum actual measureed value of acceleration and peak response acceleration calculation, to be finally calculated
The suitable load boundary value of battery bag support.Due in the present invention, avoiding the maximum actual measureed value of acceleration that will be surveyed
As boundary condition, but by data processing, using the relative acceleration of battery bag support and automobile frame as boundary condition,
Therefore it is more reasonable credible that load boundary value is calculated, to improve the potentiality optimized to battery bag support lightweight.
Concrete scheme of the invention is described in further detail with a more specifical example below.Please refer to 2
Following step is specifically included for the analysis method for the automobile batteries bag support intensity that second embodiment of the invention proposes to Fig. 5
It is rapid:
S201 carries out the spectrum acquisition of acceleration road to battery bag support.
For automobile, including automobile frame, battery bag support is equipped on the automobile frame.It should be understood that in electricity
One battery pack is installed in the bag support of pond.In this step, the spectrum acquisition of acceleration road is carried out to battery bag support, namely carries out road
Spectrum actual measurement operation, obtains the maximum actual measureed value of acceleration of battery bag support.
Wherein, maximum actual measureed value of acceleration includes the direction x maximum actual measureed value of acceleration, the direction y maximum actual measureed value of acceleration and the side z
To maximum actual measureed value of acceleration.In addition, when choosing acceleration analysis point, need to guarantee in battery pack branch for battery bag support
It is chosen the medianly zygomorphic position of frame.As shown in figure 3, in this step, the x of the battery bag support detected,
Y, z maximum actual measureed value of acceleration is respectively 5.1g, 5.8g and 10.2g.
S202 establishes automobile frame system finite element model.
In the present embodiment, automobile frame system include automobile frame, the battery bag support on automobile frame and
Battery pack in battery bag support.Finite element model is established to the automobile frame system, the finite element model established is such as
Shown in Fig. 4.
S203 applies frequency response excitation between automobile frame and automobile chassis.
After establishing frame system and frame finite element model, apply a frequency response between automobile frame and automobile chassis
The turbulent conditions on road surface, corresponding battery bag support can generate a frequency response in excitation, namely the practical driving conditions of simulation.Frequently
The range of rate responsing excitation is 1~1.2g, and in this step, the value of the frequency response excitation applied is 1g.
S204 obtains road excitation value according to maximum actual measureed value of acceleration and peak response acceleration calculation.
It should be pointed out that including the direction x, the side y for maximum actual measureed value of acceleration and peak response acceleration
To and the direction z three-dimensional acceleration.In the present embodiment, it is illustrated by taking the acceleration in the direction x as an example.
As described above, the maximum actual measureed value of acceleration in the direction x is 5.1g in above-mentioned maximum actual measureed value of acceleration.Referring to Fig. 5, x
The peak response acceleration in direction is 7.636g.In the direction x that has obtained certain test point corresponding maximum actual measureed value of acceleration and
After peak response acceleration, a road surface excitation value Kx will be obtained with peak response acceleration at maximum actual measureed value of acceleration, namely:
Kx=5.1/7.636=0.668g
Road excitation value is obtained load boundary value multiplied by safety coefficient by S205.
In order to further ensure the safety coefficient of battery bag support, the range of the safety coefficient is 1.25~1.35.At this
In embodiment, road excitation value is obtained into the load boundary value on the direction x multiplied by safety coefficient, namely:
0.668*1.3=0.868g
In the present embodiment, using 0.868g as gravitational field x to acceleartion boundary condition, rather than survey 5.1g accelerate
Spend the boundary condition as gravitational field.Similarly, the load boundary in the direction y and the direction z can be calculated using same method
Value.
Referring to Fig. 6, the analysis system of the automobile batteries bag support intensity proposed for third embodiment of the invention,
In, including sequentially connected data acquisition module 11, modeling analysis module 12 and calculating confirmation module 13；
Wherein the data acquisition module 11 is specifically used for:
The spectrum acquisition of acceleration road is carried out to the battery bag support, is accelerated with obtaining the maximum actual measurement of the battery bag support
Degree；
The modeling analysis module 12 is specifically used for:
To finite element analysis is carried out in automobile frame system, to obtain corresponding peak response acceleration, wherein the vapour
Vehicle carriage system includes automobile frame, the battery bag support on the automobile frame and is set in the battery bag support
Battery pack；
The calculating confirmation module 13 is specifically used for:
Road excitation value is obtained according to the maximum actual measureed value of acceleration and the peak response acceleration calculation, and according to
Corresponding load boundary value is calculated in the road excitation value.
Referring to Fig. 7, the analysis system of the automobile batteries bag support intensity proposed for fourth embodiment of the invention,
In, including sequentially connected data acquisition module 11, modeling analysis module 12 and calculating confirmation module 13；
Wherein the data acquisition module 11 is specifically used for:
The spectrum acquisition of acceleration road is carried out to the battery bag support, is accelerated with obtaining the maximum actual measurement of the battery bag support
Degree；
The modeling analysis module 12 is specifically used for:
To finite element analysis is carried out in automobile frame system, to obtain corresponding peak response acceleration, wherein the vapour
Vehicle carriage system includes automobile frame, the battery bag support on the automobile frame and is set in the battery bag support
Battery pack；
The modeling analysis module 12 includes model foundation unit 121 interconnected and excitation applying unit 122；
Wherein model foundation unit 121 is specifically used for:
Establish automobile frame system finite element model；
Excitation applying unit 122 is specifically used for:
Apply frequency response excitation, between the automobile frame and automobile chassis to obtain the institute of the battery bag support
State peak response acceleration.
The calculating confirmation module 13 is specifically used for:
Road excitation value is obtained according to the maximum actual measureed value of acceleration and the peak response acceleration calculation, and according to
Corresponding load boundary value is calculated in the road excitation value.
The calculating confirmation module 13 includes the first computing unit 131 interconnected and the second computing unit 132；
First computing unit 131 is specifically used for:
The maximum actual measureed value of acceleration is obtained into the road excitation value divided by the peak response acceleration；
Second computing unit 132 is specifically used for:
The road excitation value is obtained into the load boundary value multiplied by safety coefficient.
Those of ordinary skill in the art will appreciate that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program.The program can be stored in a computer readable storage medium.
The program when being executed, includes the steps that described in the above method.The storage medium, comprising: ROM/RAM, magnetic disk, CD
Deng.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of analysis method of automobile batteries bag support intensity, which is characterized in that described method includes following steps:
The spectrum acquisition of acceleration road is carried out to the battery bag support, to obtain the maximum actual measureed value of acceleration of the battery bag support；
To finite element analysis is carried out in automobile frame system, to obtain corresponding peak response acceleration, wherein the Automobile
Frame system includes automobile frame, the battery bag support on the automobile frame and the electricity in the battery bag support
Chi Bao；
Road excitation value is obtained according to the maximum actual measureed value of acceleration and the peak response acceleration calculation, and according to described
Corresponding load boundary value is calculated in road excitation value.
2. the analysis method of automobile batteries bag support intensity according to claim 1, which is characterized in that the maximum actual measurement
Acceleration includes the direction x maximum actual measureed value of acceleration, the direction y maximum actual measureed value of acceleration and the direction z maximum actual measureed value of acceleration, described
Peak response acceleration includes the direction x peak response acceleration, and the direction y peak response acceleration and the direction z peak response add
Speed.
3. the analysis method of automobile batteries bag support intensity according to claim 2, which is characterized in that described to Automobile
Finite element analysis is carried out in frame system, is included the following steps: in the method for obtaining corresponding peak response acceleration
Establish automobile frame system finite element model；
Apply frequency response excitation, between the automobile frame and automobile chassis to obtain described in the battery bag support most
Big response acceleration.
4. the analysis method of automobile batteries bag support intensity according to claim 2, which is characterized in that described according to
Maximum actual measureed value of acceleration and the peak response acceleration calculation obtain road excitation value, and according to the road excitation value meter
The method for obtaining corresponding load boundary value is calculated to include the following steps:
The maximum actual measureed value of acceleration is obtained into the road excitation value divided by the peak response acceleration；
The road excitation value is obtained into the load boundary value multiplied by safety coefficient.
5. the analysis method of automobile batteries bag support intensity according to claim 4, which is characterized in that the frequency response
The range of excitation is 1~1.2g, and the range of the safety coefficient is 1.25~1.35.
6. a kind of analysis system of automobile batteries bag support intensity characterized by comprising
Data acquisition module, for carrying out the spectrum acquisition of acceleration road to the battery bag support, to obtain the battery bag support
Maximum actual measureed value of acceleration；
Modeling analysis module, for being accelerated with obtaining corresponding peak response to finite element analysis is carried out in automobile frame system
Degree, wherein the automobile frame system include automobile frame, the battery bag support on the automobile frame and be set to institute
State the battery pack in battery bag support；
Confirmation module is calculated, for obtaining road surface according to the maximum actual measureed value of acceleration and the peak response acceleration calculation
Excitation value, and corresponding load boundary value is calculated according to the road excitation value.
7. the analysis system of automobile batteries bag support intensity according to claim 6, which is characterized in that the maximum actual measurement
Acceleration includes the direction x maximum actual measureed value of acceleration, the direction y maximum actual measureed value of acceleration and the direction z maximum actual measureed value of acceleration, described
Peak response acceleration includes the direction x peak response acceleration, and the direction y peak response acceleration and the direction z peak response add
Speed.
8. the analysis system of automobile batteries bag support intensity according to claim 7, which is characterized in that the modeling analysis
Module includes:
Model foundation unit, for establishing automobile frame system finite element model；
Applying unit is motivated, it is described to obtain for applying frequency response excitation between the automobile frame and automobile chassis
The peak response acceleration of battery bag support.
9. the analysis system of automobile batteries bag support intensity according to claim 7, which is characterized in that the calculating confirmation
Module includes:
First computing unit, for by the maximum actual measureed value of acceleration divided by the peak response acceleration to obtain the road surface
Excitation value；
Second computing unit, for the road excitation value to be obtained the load boundary value multiplied by safety coefficient.
10. the analysis system of automobile batteries bag support intensity according to claim 9, which is characterized in that the frequency is rung
The range that stress be encouraged is 1~1.2g, and the range of the safety coefficient is 1.25~1.35.
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| CN114626278A (en) * | 2022-05-16 | 2022-06-14 | 湖南大学 | Method for evaluating structural performance and monitoring health of power battery bracket |
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| CN109960877B (en) | 2022-07-22 |
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