CN106053092A - Sled test method for simulating auto frontal impact and sled - Google Patents

Sled test method for simulating auto frontal impact and sled Download PDF

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Publication number
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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China
Prior art keywords
sled
chassis
test method
emulation
simulation
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Granted
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CN201610376585.6A
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CN106053092B (en
Inventor
吕俊成
莫易敏
林智桂
王峰
贾丽刚
罗覃月
廖贤明
苏东
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SAIC GM Wuling Automobile Co Ltd
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SAIC GM Wuling Automobile Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00Testing of vehicles
    • G01M17/007Wheeled or endless-tracked vehicles
    • G01M17/0078Shock-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

A kind of sled test method of simulated automotive head-on crash and chassis
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
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
CN114379474A (en) * 2022-02-18 2022-04-22 摩登汽车有限公司 Design method of vehicle door trim

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Cited By (19)

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Publication number Priority date Publication date Assignee Title
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
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
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
CN109635386B (en) * 2018-11-27 2022-10-04 中电建冀交高速公路投资发展有限公司 Bridge moving vehicle load identification method
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
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
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
CN110083949B (en) * 2019-04-30 2023-04-07 重庆长安汽车股份有限公司 Pre-sensor signal reproduction method and system
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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