Study on Optimization of Restraint System in Oblique Crash under Car to Car Collision

YAN Lingbo, XIE Wenna, CAO Libo, LIU Yafei, DAI Hongliang

Abstract

This study aimed at exploring the design guidelines of restraints system parameters for occupants in oblique crash under car to car collision. The full car finite element model of a compact car was used to conduct the 30° oblique impact, and the model of occupant restraint system in the driving area were established and validated. The sensitive analysis of restraint system parameters to the driver in target car and driving car was then carried out. These parameters included seat belt parameters, airbag parameters and safety seat parameters. Furthermore, restraint system parameters were optimized according to these sensitive injury parameters. It is showed that the driver’s head and chest injuries are sensitive to the locations of D-ring, anchor and buckle in the 30° oblique crash. Meanwhile, the femur forces are sensitive to the locations of anchor and buckle. Further, the driver injuries in both the target car and driving car are sensitive to airbag fire time, pretensioner fire time, airbag holes areas and mass flow rate of the airbag. After the optimization, the injury index WIC of driver of target car is induced by 33.7% and that of the driver of driving car is induced by 7.4%. The optimization results make the protecting effect of the restraint system for drivers both in target car and in driving car to be optimized.

 

Keywords: 30 degree oblique crash,  sensitive parameters,  restraint system,  parameters optimization


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References


U S department of transportation. Traffic safety facts 2003; a compilation of motor vehicle crash data from the fatality analysis reporting system and the general estimates system [R]. National Highway Traffic Safety Administration. National Center for Statistics & Analysis; HS,809/775. 2005 : 13 - 18.

SULLIVAN K. HENRY S. LA ITU RI T R. A frontal impact taxonomy for USA field data [J]. SAE International Journal of Passenger Cars Mechanical Systems. 2008. 1 ( 1 ) ; 406 - 429.

ZHANG Jinhuan. DU Huiliang. MA Chunsheng. et al. Automotive design for crash safety [J]. Beijing; Tsinghua University Press. 2010; 152-155. (In Chinese)

HORSCH J D. Occupant dynamics as a function of impact angle and belt restraint [R]. SAE Technical Paper 801310. 1980:13-17.

SAUNDERS J W. PRASAD A. NHTSA's frontal offset research program [R]. SAK Technical Paper 2004 - 01 - 1169. 2004:102-149.

STUCK1 S L. RAGLAND C, HENNESSEY B.etal. N H IS A 's improved frontal protection research program [R]. SAE Technical Paper 950497, 1995 ;73 -79.

HUANG Dong. Study on improving the crashworthiness safety of body structure based on front oblique impact [_I)J. Changsha; College of Mechanical and Vehicle Engineering. Hunan University. 2010; 19 -54. (In Chinese)

ZHOU Hangfei. Study on simulation and prevention effect for driver injury based on front oblique impact [D]. Changsha: College of Mechanical and Vehicle Engineering. Hunan UniNIU Weizhong. XU Pengshan. LIU Jinxin. Influence of small overlap frontal oblique impact conditions on crashworthiness of car body [J]. Automotive Safety and Energy, 2017, 8( 1):53 - 58. (In Chinese)

CAO Libo. ZHANG Ping, YAN Lingbo. et al. The study on driver injury in oblique and small overlap crash under car to car collision [J]. Automobile Engineer, 2016. 38(2); 174 - 180. (In Chinese)

YAN Lingbo, DING Zongyang. CAO Libo, et al. Study on the driver injury in vehicle to vehicle oblique crashes [J]. Journal of Hunan University (Natural Sciences), 2016, 43 (4): 59 - 66. (In Chinese)

CUL Chongzhen. The study on collaborative optimization of vehicle frontal impact safety in multiple typical situations [I]. Changsha: College of Mechanical and Vehicle Engineering. Hunan University. 2014: 85-102. (In Chinese)


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