CN106053092A - Sled test method for simulating auto frontal impact and sled - Google Patents
Sled test method for simulating auto frontal impact and sled Download PDFInfo
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- CN106053092A CN106053092A CN201610376585.6A CN201610376585A CN106053092A CN 106053092 A CN106053092 A CN 106053092A CN 201610376585 A CN201610376585 A CN 201610376585A CN 106053092 A CN106053092 A CN 106053092A
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- sled
- chassis
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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 invention is applicable to the test verification field, and provides a sled test method for simulating an auto frontal impact and a sled. The sled comprises a basic trolley, an auto carling, a subframe, an upper body and a rigid power assembly. The sled test method comprises the following steps: A, a mule car CAE simulation impact model is built; B, according to the mule car simulation impact model, an equivalent sled CAE simulation impact model is made; C, simulation data analysis is carried out on the mule car simulation impact model and the sled simulation impact model; and D, a simulation data analysis result of the sled simulation impact model and a simulation data analysis result of the mule car simulation impact model are benchmarked, if consistent, the sled is tried and assembled for impact test verification, and if not, simulation analysis and benchmarking are carried out on the sled simulation impact model again. Thus, the problems of difficult test sled processing, high cost and long preparation time are solved.
Description
Technical field
The invention belongs to verification experimental verification field, particularly relate to sled test method and the platform of a kind of simulated automotive head-on crash
Car.
Background technology
Along with going deep into of frontal crash of vehicles safety research, Frontal Crash Safety of HF target is evaluated, is obtained
Related data required for theoretical research and be authenticated automobile all be unableing to do without Frontal Crash Safety of HF test.Full scale vehicle collision
Test be evaluate vehicle safety the most directly, the most convictive method, but testing expenses are expensive, it is difficult to be repeated several times
Test.In this context, just it is badly in need of finding the frontal crash of vehicles test method of a kind of low cost, and the most modal is exactly
Real vehicle is simplified chassis or mule car.
Sled impact test is the collision test method replacing real vehicle with chassis.In sled test, it is desirable to chassis has
Having enough strength and stiffness, general sled impact test is that the body of a motor car endergonic structure carrying out verifying by needs is arranged on
Rigid foundation chassis front portion carries out impact test, verifies the energy absorption performance of endergonic structure with this, provides for Automobile Body Design and depends on
According to.And mule car is at new car initial stage of development, in order to verify the performances such as car load master-plan, chassis, safety, with existing vehicle body with
Newly-designed lower body is welded into new body structure, and then system loads onto newly-designed chassis, power assembly etc..
In safety collision early development at present, the checking of head-on crash body structure predominantly builds mule car and carries out collision examination
Testing or use deceleration type sled test, the shortcoming of this kind of test is:
The test of mule car is the important tests stage as automotive development primary-stage survey design rationality, and it is by the portion of existing vehicle
The manual transformation of the way of part forms, and is primarily present processing difficulties, cost height, time length etc. for problem, and process of the test easily occur by
Test failure is caused in manufacture factor.Tradition chassis certain vehicle sled test as shown in Figure 1, can only obtain front longitudinal energy-absorbing district
Accelerating curve, can only investigate the reasonability in energy-absorbing district and too big with the accelerating curve different from those of real vehicle, there is target
Simply, data sheet first-class problem is obtained, it is impossible to curve is used for constrained system assessment.
Summary of the invention
It is an object of the invention to provide a kind of sled test method of simulated automotive head-on crash, it is intended to solve testing stand
Vehicle Processing difficulty, cost are high, the problem of time length.
The present invention is achieved in that a kind of sled test method of simulated automotive head-on crash, including basis dolly, vapour
Car longeron, subframe, upper body and rigidity power assembly, described sled test method comprises the following steps:
A, set up mule car CAE emulate collision model;
B, the CAE of the chassis emulating collision model formulation equivalence according to mule car emulate collision model;
C, carry out emulating data analysis by mule car emulation collision model and chassis emulation collision model;
D, the emulation data results that chassis is emulated collision model and mule car emulation collision model emulation data analysis knot
Fruit is carried out mark;As result is consistent, then manufacture experimently and group type chassis carries out impact test checking;As result is inconsistent, the most right
Chassis emulation collision model carries out simulation analysis and to mark.
The further technical scheme of the present invention is: further comprise the steps of: in described step A
A1, the ACE of mule car is emulated collision model carry out front deck layout optimization and structural design optimization.
The further technical scheme of the present invention is: described front deck layout optimization is its internal structure to be divided, and utilizes
The structure that rigidity is less replaces the sheet metal structural easily deformed, and the structure replacement deflection utilizing rigidity bigger is less or does not sends out
The frame structure of the shape that changes.
The further technical scheme of the present invention is: described structure optimization is rigid structure will to be used between girder system to carry out even
Connecing, and be fastened by bolts part and be fixed, overall structure is fixed in rigid plate.
The further technical scheme of the present invention is: further comprise the steps of: in described step C
Crash acceleration, conquassation deformation and crucial energy absorbing component cross section power are mainly analyzed by C1, emulation data analysis.
The further technical scheme of the present invention is: further comprise the steps of: in described step D
D1, chassis is emulated the crash acceleration of data analysis, conquassation deformation and the result of crucial energy absorbing component cross section power and mule
The sub-car emulation crash acceleration of data analysis, conquassation deformation and crucial energy absorbing component cross section power contrast.
Another object of the present invention is to provide a kind of chassis, described chassis includes basis dolly, automobile longitudinal girder, secondary car
Frame, upper body and rigidity power assembly, described upper body, subframe, rigidity power assembly are respectively with described basis dolly even
Connecing, described automobile longitudinal girder is connected with described subframe.
The further technical scheme of the present invention is: described upper body, subframe, rigidity power assembly respectively with described basis
Dolly is connected by bolt or welding or rivet welding, and described automobile longitudinal girder or welds or rivet welding company by bolt with described subframe
Connect.
The invention has the beneficial effects as follows: solve the problems such as testing stand Vehicle Processing difficulty, cost height, time length.
Accompanying drawing explanation
Fig. 1 is certain vehicle sled test comparison diagram that the embodiment of the present invention provides;
Fig. 2 is the sled test method step flow chart of a kind of simulated automotive head-on crash that the embodiment of the present invention provides;
Fig. 3 is the chassis accelerating curve comparison diagram that the embodiment of the present invention provides;
Fig. 4 is the machine speed curve comparison figure that the embodiment of the present invention provides;
Fig. 5 is the sled test method Efficiency Comparison figure that the embodiment of the present invention provides.
Detailed description of the invention
Reference:
Fig. 2 shows the sled test method step flow chart of a kind of simulated automotive head-on crash that the present invention provides, including base
Plinth dolly, automobile longitudinal girder, subframe, upper body and rigidity power assembly,
Described sled test method comprises the following steps:
Step S1, the CAE setting up mule car emulates collision model;The ACE emulation collision model of mule car is carried out front deck layout
Optimize and structural design optimization.Front deck layout optimization is its internal structure to be divided, and utilizes the structure that rigidity is less to replace
The sheet metal structural easily deformed, utilizes the structure that rigidity is bigger to replace the frame structure that deflection is less or does not deform,
In car load carries out simplification chassis design process, we are mainly simplified by parts and replace this patent institute has been done step-by-step
The correlation test sample car manufacture related to.Structure optimization is rigid structure will to be used between girder system to be attached, and tight by bolt
Firmware is fixed, and overall structure is fixed in rigid plate, utilizes three, left, center, right channel acquisition acceleration signal.In order to keep away
Exempt from chassis overall structure overweight, non-mounted position in the rigid plate of rear end is carried out cutting.In the design of simulation of engine structure,
Consider that electromotor touching and power transmission shaft dieback moment are the most important time points, in the design of this part-structure, mainly
In order to obtain the accelerating curve close with car load acceleration amplitude, therefore consider to replace starting with axially mounted thin walled beam structure
Machine structure.Owing to there are two crucial moments in the second order acceleration stage, then use secondary structure, i.e. use the thin walled beam of Length discrepancy
Two peak value moment of analog acceleration and the acceleration amplitude of correspondence.
Step S2, formulates the CAE emulation collision model of the chassis of equivalence according to mule car emulation collision model.
Step S3, carries out emulating data analysis with chassis emulation collision model by mule car emulation collision model;Emulation number
Mainly crash acceleration, conquassation deformation and crucial energy absorbing component cross section power are analyzed according to analyzing.
Step S4, emulates emulation data results and the mule car emulation collision model emulation number of collision model by chassis
Carry out mark according to analysis result;Chassis is emulated the crash acceleration of data analysis, conquassation deformation and crucial energy absorbing component cross section
It is right that the result of power and the mule car emulation crash acceleration of data analysis, conquassation deformation and crucial energy absorbing component cross section power are carried out
Ratio;As result is consistent, then trial-production and assembling trolley carry out impact test checking;As result is inconsistent, the most again chassis is emulated
Collision model carries out simulation analysis and to mark.
A kind of chassis includes basis dolly, automobile longitudinal girder, subframe, upper body and rigidity power assembly, described in get on the bus
Body, subframe, rigidity power assembly are connected with described basis dolly respectively, and described automobile longitudinal girder is connected with described subframe.
Described upper body, subframe, rigidity power assembly or weld or rivet welding by bolt with described basis dolly respectively
Connecting etc. connected mode, described automobile longitudinal girder is connected by bolt or the connected mode such as welding or rivet welding with described subframe.Logical
Cross bolt or the connected mode such as welding or rivet welding connects and can be securely attached to together by individual parts.
Sled test method is primarily to solve the problem that mule car manufactures difficulty, cost is high, and therefore both are in checking
Must be equivalent in central collision performance.
First, the mule car 3D digital-to-analogue set up by design department is built the CAE of mule car and is emulated collision model, and carries out
Front deck layout optimization and structural design optimization.
Secondly, formulate the chassis scheme of equivalence according to mule car phantom after optimizing, and the CAE emulation setting up chassis is touched
Hit model, carry out chassis model with mule vehicle model to mark.Chassis utilizes the crucial collision energy-absorbing structure such as automobile longitudinal girder, subframe
Assembling parts body forward structure lower body, utilizes Thin Walled Beam System to be assembled into anterior upper body equivalent structure, utilizes the section bar that rigidity is big
With the combination replacement electromotor of thin walled beam, finally above structure is assembled into basis chassis on (basis chassis by ECE R95 side impact
The dolly transformation of the way forms).During to mark, the front lower body consistent with real vehicle and chassis are not altered, and are used for substituting electromotor
And the component of upper body structure is as the object mainly adjusted timestamp.Emulate and the chassis model after mark need to be ensured that collision is accelerated
The indexs such as degree, conquassation deformation, crucial absorption cell cross section power are consistent with mule car.
Then, trial-production and the transformation of chassis is carried out according to chassis simulation analysis scheme.
Finally, carry out sled impact test to verify.
Use the sled test method of simulated automotive head-on crash, can effectively reappear real vehicle collision test accelerating curve
And front longitudinal conquassation deformation energy-absorbing.
Verifying through sled test, the deformation result of sled test each several part is coincide with FEM (finite element) model simulation result, and can
With complete replication complete vehicle test result curve.
Sled test result shows, the test of chassis/emulation data and the complete automobile collision acceleration of target vehicle, speed song
The line goodness of fit is higher, demonstrates the high reliability of test method.Fig. 3,4 be accelerating curve comparison diagram and rate curve contrast
Figure.
This chassis has simple in construction, easy to manufacture, with low cost and can simulate full scale vehicle collision accelerating curve etc.
Feature, alternative existing mule car is tested.This test chassis test method is assembled into chassis sample by process trial processing
Part, by cae analysis and the checking of frontal collision test.Use the sled test method of simulated automotive head-on crash, can be effective
Reduce sample car cost in new car exploitation, shorten the new car model development time cycle.As it is shown in figure 5, by mule car and chassis pair
Ratio, it appeared that sled test method is compared to the time of frontal crash of vehicles, can shorten 2 months stage of preparation;Economic effect
Benefit aspect, sled test can substitute existing mule car, be greatly saved new car model development cost.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (8)
1. a sled test method for simulated automotive head-on crash, including basis dolly, automobile longitudinal girder, subframe, upper body
And rigidity power assembly, it is characterised in that described sled test method comprises the following steps:
A, set up mule car CAE emulate collision model;
B, the CAE of the chassis emulating collision model formulation equivalence according to mule car emulate collision model;
C, carry out emulating data analysis by mule car emulation collision model and chassis emulation collision model;
D, the emulation data results that chassis is emulated collision model and mule car emulation collision model emulation data analysis knot
Fruit is carried out mark;As result is consistent, then trial-production and assembling trolley carry out impact test checking;As result is inconsistent, the most right
Chassis emulation collision model carries out simulation analysis and to mark.
Sled test method the most according to claim 1, it is characterised in that further comprise the steps of: in described step A
A1, the ACE of mule car is emulated collision model carry out front deck layout optimization and structural design optimization.
Sled test method the most according to claim 2, it is characterised in that described front deck layout optimization is by its internal junction
Structure divides, and utilizes the structure that rigidity is less to replace the sheet metal structural easily deformed, and utilizes the structure that rigidity is bigger to replace
Deflection is less or the frame structure that do not deforms.
Sled test method the most according to claim 2, it is characterised in that described structure optimization is will to use between girder system
Rigid structure is attached, and is fastened by bolts part and is fixed, and overall structure is fixed in rigid plate.
Sled test method the most according to claim 1, it is characterised in that further comprise the steps of: in described step C
Crash acceleration, conquassation deformation and crucial energy absorbing component cross section power are mainly analyzed by C1, emulation data analysis.
Sled test method the most according to claim 1, it is characterised in that further comprise the steps of: in described step D
D1, chassis is emulated the crash acceleration of data analysis, conquassation deformation and the result of crucial energy absorbing component cross section power and mule
The sub-car emulation crash acceleration of data analysis, conquassation deformation and crucial energy absorbing component cross section power contrast.
7. the chassis described in a claim 1-6 any one, it is characterised in that described chassis includes basis dolly, automobile
Longeron, subframe, upper body and rigidity power assembly, described upper body, subframe, rigidity power assembly respectively with described base
Plinth dolly connects, and described automobile longitudinal girder is connected with described subframe.
Chassis the most according to claim 7, it is characterised in that described upper body, subframe, rigidity power assembly respectively with
Described basis dolly is connected by bolt or welding or rivet welding, described automobile longitudinal girder pass through bolt with described subframe or weld or
Rivet welding connects.
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Cited By (11)
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CN108622230A (en) * | 2017-03-15 | 2018-10-09 | 优华劳斯汽车系统(上海)有限公司 | The method of precise positioning parts when restructuring the white body of mule vehicle |
CN109596365A (en) * | 2018-12-27 | 2019-04-09 | 重庆长安汽车股份有限公司 | A kind of sled test method for simulating offset collision |
CN109635386A (en) * | 2018-11-27 | 2019-04-16 | 中电建冀交高速公路投资发展有限公司 | A kind of bridge move vehicle Load Identification Methods |
CN110083949A (en) * | 2019-04-30 | 2019-08-02 | 重庆长安汽车股份有限公司 | A kind of front sensors signal reproducing method and system |
CN110823587A (en) * | 2018-08-08 | 2020-02-21 | 重庆长安汽车股份有限公司 | Side collision trolley test method |
CN111428389A (en) * | 2019-01-10 | 2020-07-17 | 宝山钢铁股份有限公司 | Performance analysis method of front longitudinal beam |
CN111625902A (en) * | 2020-05-11 | 2020-09-04 | 恒大新能源汽车投资控股集团有限公司 | Equivalent simulation method for electric automobile column collision |
CN112765835A (en) * | 2021-03-12 | 2021-05-07 | 中车青岛四方机车车辆股份有限公司 | Aluminum honeycomb test piece collision simulation and test benchmarking method and device |
CN114001974A (en) * | 2021-09-23 | 2022-02-01 | 中汽研汽车检验中心(天津)有限公司 | Method for evaluating collision response contribution of vehicle front component to passenger compartment |
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CN110823587A (en) * | 2018-08-08 | 2020-02-21 | 重庆长安汽车股份有限公司 | Side collision trolley test method |
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CN109596365A (en) * | 2018-12-27 | 2019-04-09 | 重庆长安汽车股份有限公司 | A kind of sled test method for simulating offset collision |
CN111428389A (en) * | 2019-01-10 | 2020-07-17 | 宝山钢铁股份有限公司 | Performance analysis method of front longitudinal beam |
CN111428389B (en) * | 2019-01-10 | 2023-10-17 | 宝山钢铁股份有限公司 | Performance analysis method of front longitudinal beam |
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CN111625902A (en) * | 2020-05-11 | 2020-09-04 | 恒大新能源汽车投资控股集团有限公司 | Equivalent simulation method for electric automobile column collision |
CN112765835A (en) * | 2021-03-12 | 2021-05-07 | 中车青岛四方机车车辆股份有限公司 | Aluminum honeycomb test piece collision simulation and test benchmarking method and device |
CN112765835B (en) * | 2021-03-12 | 2022-04-22 | 中车青岛四方机车车辆股份有限公司 | Aluminum honeycomb test piece collision simulation and test benchmarking method and device |
CN114001974B (en) * | 2021-09-23 | 2023-09-22 | 中汽研汽车检验中心(天津)有限公司 | Method for evaluating contribution of vehicle front component to passenger cabin collision response |
CN114001974A (en) * | 2021-09-23 | 2022-02-01 | 中汽研汽车检验中心(天津)有限公司 | Method for evaluating collision response contribution of vehicle front component to passenger compartment |
CN114088430A (en) * | 2021-11-18 | 2022-02-25 | 中车长春轨道客车股份有限公司 | Method, device and equipment for testing crushing of rail vehicle and storage medium |
CN114088430B (en) * | 2021-11-18 | 2023-05-23 | 中车长春轨道客车股份有限公司 | Method, device, equipment and storage medium for testing crushing of railway vehicle |
CN114379474A (en) * | 2022-02-18 | 2022-04-22 | 摩登汽车有限公司 | Design method of vehicle door trim |
CN114379474B (en) * | 2022-02-18 | 2023-12-29 | 摩登汽车有限公司 | Design method of vehicle door trim |
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