CN106053092B - A kind of the sled test method and trolley of simulated automotive head-on crash - Google Patents
A kind of the sled test method and trolley of simulated automotive head-on crash Download PDFInfo
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- CN106053092B CN106053092B CN201610376585.6A CN201610376585A CN106053092B CN 106053092 B CN106053092 B CN 106053092B CN 201610376585 A CN201610376585 A CN 201610376585A CN 106053092 B CN106053092 B CN 106053092B
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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
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
Abstract
The present invention is suitable for verification experimental verification field, provides a kind of sled test method of simulated automotive head-on crash, and trolley includes that basic trolley, automobile longitudinal girder, subframe, upper body and rigid power assembly, the sled test method include the following steps：A, the CAE emulation collision models of mule vehicle are established；B, the CAE emulation collision models that collision model formulates equivalent trolley are emulated according to mule vehicle；C, mule vehicle emulation collision model and trolley emulation collision model are subjected to emulation data analysis；D, emulation data results and mule vehicle emulation collision model emulation data results that trolley is emulated to collision model are carried out to mark；If result is consistent, then trial-production and assembling trolley carry out impact test verification；If result is inconsistent, then simulation analysis is carried out and to mark to trolley emulation collision model again.Aim to solve the problem that difficult, of high cost, time length the problem of testing stand Vehicle Processing.
Description
Technical field
The invention belongs to verification experimental verification field more particularly to the sled test methods and platform of a kind of simulated automotive head-on crash
Vehicle.
Background technology
With going deep into for frontal crash of vehicles safety research, Frontal Crash Safety of HF target is evaluated, is obtained
It related data required for theoretical research and automobile is authenticated all be unable to do without Frontal Crash Safety of HF experiment.Full scale vehicle collision
Experiment is most direct, the most convictive method of evaluation vehicle safety, but testing expenses are expensive, it is difficult to is repeated several times
Experiment.In this context, just it is badly in need of finding a kind of frontal crash of vehicles test method of low cost, and current most common is exactly
Real vehicle is simplified into trolley or mule vehicle.
Sled impact test is the collision test method for replacing real vehicle with trolley.In sled test, it is desirable that trolley has
It is that the body of a motor car endergonic structure that will be verified is mounted on to have enough strength and stiffness, general sled impact test
Rigid foundation trolley front carry out impact test, the energy absorption performance of endergonic structure is verified with this, for Automobile Body Design provide according to
According to.And mule vehicle be in new car initial stage of development, in order to verify the performances such as vehicle master-plan, chassis, safety, with existing vehicle body with
Newly-designed lower body is welded into new body structure, makes and then load onto newly-designed chassis, power assembly etc..
In safety collision early development at present, head-on crash body structure verification predominantly structure mule vehicle carries out collision examination
Testing or use deceleration type sled test, the shortcomings that this kind of experiment is：
The experiment of mule vehicle is the important tests stage as automotive development primary-stage survey design rationality, by existing vehicle
Component restructure by hand, it is problem to be primarily present processing difficulties, of high cost, time length etc., and tests process and easily go out
Now since manufacture factor leads to test failure.Traditional trolley certain vehicle sled test as shown in Figure 1 can only obtain front longitudinal beam suction
Can area accelerating curve, the reasonability in energy-absorbing area can only be investigated and too big with the accelerating curve different from those of real vehicle, existed
Target is simple, obtains the problems such as data sheet one, can not assess curve for restraint system.
Invention content
The purpose of the present invention is to provide a kind of sled test methods of simulated automotive head-on crash, it is intended to solve testing stand
Difficult, of high cost, time length the problem of Vehicle Processing.
The invention is realized in this way a kind of sled test method of simulated automotive head-on crash, trolley includes that basis is small
Vehicle, automobile longitudinal girder, subframe, upper body and rigid power assembly, the sled test method include the following steps：
A, the CAE emulation collision models of mule vehicle are established；
B, the CAE emulation collision models that collision model formulates equivalent trolley are emulated according to mule vehicle；
C, mule vehicle emulation collision model and trolley emulation collision model are subjected to emulation data analysis；
D, trolley is emulated to the emulation data results and mule vehicle emulation collision model emulation data point of collision model
Analysis result is carried out to mark；If result is consistent, then trial-production and group type trolley carry out impact test verification；If result is inconsistent, then weigh
Simulation analysis newly is carried out and to mark to trolley emulation collision model.
The present invention further technical solution be：Further include step in the step A：
A1, front deck layout optimization and structural design optimization are carried out to the CAE emulation collision models of mule vehicle.
The present invention further technical solution be：The front deck layout optimization is to divide its internal structure, is utilized
The smaller structure of rigidity replaces the sheet metal structural easily to deform, and it is smaller or do not send out to replace deflection using the larger structure of rigidity
The frame structure for the shape that changes.
The present invention further technical solution be：The structure optimization is will to be connected using rigid structure between girder system
It connects, and is fastened by bolts part and is fixed, overall structure is fixed in rigid plate.
The present invention further technical solution be：Further include step in the step C：
C1, emulation data analysis mainly analyze crash acceleration, conquassation deformation and crucial energy absorbing component section power.
The present invention further technical solution be：Further include step in the step D：
D1, the crash acceleration that trolley is emulated to data analysis, the result for being crushed deformation and crucial energy absorbing component section power
Crash acceleration, conquassation deformation and the crucial energy absorbing component section power that data analysis is emulated with mule vehicle are compared.
Another object of the present invention is to provide a kind of trolley, the trolley includes basic trolley, automobile longitudinal girder, secondary vehicle
Frame, upper body and rigid power assembly, the upper body, subframe, rigid power assembly are connect with the basic trolley respectively,
The automobile longitudinal girder is connect with the subframe.
The present invention further technical solution be：The upper body, subframe, rigid power assembly respectively with the basis
Trolley is connected by bolt or welding or rivet welding, and the automobile longitudinal girder is connected with the subframe by bolt or welding or rivet welding
It connects.
The beneficial effects of the invention are as follows：Solve the problems such as testing stand Vehicle Processing is difficult, of high cost, time is long.
Description of the drawings
Fig. 1 is certain vehicle sled test comparison diagram provided in an embodiment of the present invention；
Fig. 2 is a kind of sled test method and step flow chart of simulated automotive head-on crash provided in an embodiment of the present invention；
Fig. 3 is trolley accelerating curve comparison diagram provided in an embodiment of the present invention；
Fig. 4 is machine speed curve comparison figure provided in an embodiment of the present invention；
Fig. 5 is sled test method Efficiency Comparison figure provided in an embodiment of the present invention.
Specific implementation mode
Reference numeral：
Fig. 2 shows a kind of sled test method and step flow chart of simulated automotive head-on crash provided by the invention, platforms
Vehicle includes basic trolley, automobile longitudinal girder, subframe, upper body and rigid power assembly,
The sled test method includes the following steps：
Step S1 establishes the CAE emulation collision models of mule vehicle；Front deck is carried out to the CAE emulation collision models of mule vehicle
Layout optimization and structural design optimization.Front deck layout optimization is to divide its internal structure, utilizes the smaller structure of rigidity
The sheet metal structural easily to deform is replaced, the frame knot that deflection is smaller or does not deform is replaced using the larger structure of rigidity
Structure, in carrying out simplifying trolley design process to vehicle, we mainly by component simplification and replace that this hair has been done step-by-step
Bright involved correlation test sample car manufacture.Structure optimization is will to be attached using rigid structure between girder system, and pass through spiral shell
Bolt fastener is fixed, and overall structure is fixed in rigid plate, and acceleration signal is acquired using the channel of left, center, right three.For
It avoids trolley overall structure overweight, non-mounted position in the rigid plate of rear end is cut.In setting for simulation of engine structure
On meter, the time point that engine touching and transmission shaft dieback moment are more important is considered, it is main in the design of the part-structure
If in order to obtain the accelerating curve close with vehicle acceleration amplitude, therefore considering to replace with axially mounted thin walled beam structure
Engine structure.Since the second order acceleration stage, there are two crucial moments, then secondary structure is used, that is, uses the thin-walled of Length discrepancy
Beam comes two peak value moments of analog acceleration and corresponding acceleration amplitude.
Step S2 emulates the CAE emulation collision models that collision model formulates equivalent trolley according to mule vehicle.
Mule vehicle emulation collision model and trolley emulation collision model are carried out emulation data analysis by step S3；Emulate number
Mainly crash acceleration, conquassation deformation and crucial energy absorbing component section power are analyzed according to analysis.
Trolley is emulated the emulation data results of collision model and mule vehicle emulation collision model emulates number by step S4
It is carried out to mark according to analysis result；Trolley is emulated to crash acceleration, conquassation deformation and the crucial energy absorbing component section of data analysis
The result of power and crash acceleration, conquassation deformation and the crucial energy absorbing component section power of the emulation data analysis of mule vehicle carry out pair
Than；If result is consistent, then trial-production and assembling trolley carry out impact test verification；If result is inconsistent, then trolley is emulated again
Collision model carries out simulation analysis and to mark.
A kind of trolley includes basic trolley, automobile longitudinal girder, subframe, upper body and rigid power assembly, the upper body,
Subframe, rigid power assembly are connect with the basic trolley respectively, and the automobile longitudinal girder is connect with the subframe.
The upper body, subframe, rigid power assembly pass through bolt or welding or rivet welding with the basic trolley respectively
Etc. connection types connection, the automobile longitudinal girder connect with the subframe by connection types such as bolt or welding or rivet welding.It is logical
Crossing the connection of the connection types such as bolt or welding or rivet welding can be securely attached to a component together.
Sled test method is primarily to solve the problems, such as that the manufacture of mule vehicle is difficult, cost is high, therefore the two is being verified
Must be equivalent in central collision performance.
First, the CAE that the mule vehicle 3D digital-to-analogues established by design department build mule vehicle emulates collision model, and carries out
Front deck layout optimization and structural design optimization.
Secondly, equivalent trolley scheme is formulated according to mule vehicle simulation model after optimization, and the CAE emulation for establishing trolley is touched
Model is hit, carries out trolley model with mule vehicle model to mark.Trolley utilizes the crucial collision energy-absorbing structure such as automobile longitudinal girder, subframe
Assembling parts vehicle foreside lower body is assembled into front upper body equivalent structure using Thin Walled Beam System, utilizes the big proximate matter of rigidity
With the combination replacement engine of thin walled beam, the above structure is finally assembled on basic trolley to (basic trolley is by ECE R95 side impacts
Trolley is restructured).The preceding lower body consistent with real vehicle and chassis are not altered during to mark, and are used to substitute engine
And the component of upper body structure is as the object to mainly being adjusted when mark.Emulation need to ensure that collision accelerates to the trolley model after mark
The indexs such as degree, conquassation deformation, crucial absorption cell section power are consistent with mule vehicle.
Then, the trial-production and transformation of trolley are carried out according to trolley simulation analysis scheme.
Finally, sled impact test is carried out to be verified.
Using the sled test method of simulated automotive head-on crash, it can effectively reappear real vehicle collision test accelerating curve
And front longitudinal beam conquassation deformation energy-absorbing.
It is verified through sled test, the deformation result and finite element model simulation result of sled test each section coincide, and can
With complete replication complete vehicle test result curve.
Sled test the result shows that, experiment/emulation data of trolley and the complete automobile collision acceleration of target vehicle, speed are bent
The line goodness of fit is higher, demonstrates the high reliability of test method.Fig. 3,4 are accelerating curve comparison diagram and rate curve comparison
Figure.
The trolley has simple in structure, and manufacture is easy, of low cost and can simulate full scale vehicle collision accelerating curve etc.
Feature, alternative existing mule vehicle experiment.The experiment trolley test method is assembled into trolley sample by process trial and processing
Part passes through the verification of CAE analysis and frontal collision test.It, can be effective using the sled test method of simulated automotive head-on crash
Sample car cost in new car exploitation is reduced, the new car model development time cycle is shortened.As shown in figure 5, by mule vehicle and trolley pair
Than it can be found that time of the sled test method compared to frontal crash of vehicles, can shorten 2 months preparatory stages；Economy effect
Beneficial aspect, sled test can substitute existing mule vehicle, greatly save new car model development cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (6)
1. a kind of sled test method of simulated automotive head-on crash, trolley include basic trolley, automobile longitudinal girder, subframe, on
Car body and rigid power assembly, which is characterized in that the sled test method includes the following steps：
A, the CAE emulation collision models of mule vehicle are established；
B, the CAE emulation collision models that collision model formulates equivalent trolley are emulated according to mule vehicle；
C, mule vehicle emulation collision model and trolley emulation collision model are subjected to emulation data analysis；
D, emulation data results and mule vehicle emulation collision model that trolley is emulated to collision model emulate data analysis knot
Fruit carries out to mark；If result is consistent, then trial-production and assembling trolley carry out impact test verification；It is if result is inconsistent, then again right
Trolley emulates collision model and carries out simulation analysis and to mark.
2. sled test method according to claim 1, which is characterized in that further include step in the step A：
A1, front deck layout optimization and structural design optimization are carried out to the CAE emulation collision models of mule vehicle.
3. sled test method according to claim 2, which is characterized in that the front deck layout optimization is by its internal junction
Structure is divided, and is replaced the sheet metal structural easily to deform using the smaller structure of rigidity, is replaced using the larger structure of rigidity
Deflection is smaller or the frame structure that does not deform.
4. sled test method according to claim 2, which is characterized in that the structure optimization is will to be used between girder system
Rigid structure is attached, and is fastened by bolts part and is fixed, and overall structure is fixed in rigid plate.
5. sled test method according to claim 1, which is characterized in that further include step in the step C：
C1, emulation data analysis mainly analyze crash acceleration, conquassation deformation and crucial energy absorbing component section power.
6. sled test method according to claim 1, which is characterized in that further include step in the step D：
D1, the crash acceleration that trolley is emulated to data analysis, the result for being crushed deformation and crucial energy absorbing component section power and mule
Crash acceleration, conquassation deformation and the crucial energy absorbing component section power of sub- vehicle emulation data analysis are compared.
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| CN110823587B (en) * | 2018-08-08 | 2021-04-06 | 重庆长安汽车股份有限公司 | Side collision trolley test method |
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