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Automotive Engineering ›› 2022, Vol. 44 ›› Issue (10): 1591-1599.doi: 10.19562/j.chinasae.qcgc.2022.10.014

Special Issue: 车身设计&轻量化&安全专题2022年

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Study on the Slid Mode in Vehicle Small-Overlap Frontal Crash

Xiaojie Chen,Song Li()   

  1. BYD Auto Industry Co. ,Ltd. ,Shenzhen  518118
  • Received:2022-07-30 Revised:2022-09-09 Online:2022-10-25 Published:2022-10-21
  • Contact: Song Li E-mail:li.song2@byd.com

Abstract:

Based on the plane motion theory, a theoretical analysis method for the slide mode of the vehicle in small-overlap frontal crash is proposed, and the relationship between the slide value and the impact forces is revealed and verified by experiments and tests. The impact area is divided into six parts and the sixth-order impact force characteristic curves are put forward. Based on the characteristic curves and the uniform design method, the sample space of vehicle slide value and different characteristic curves is obtained by using the theoretical method proposed. Furthermore, the BP neural network is established to conduct a sensitivity analysis of the impact forces and the vehicle slide value in the six regions of characteristic curves, with the critical impact region under that working condition identified. The theoretical method proposed and the sensitivity analysis conducted provide a theoretical support for the structural design for small-overlap frontal crash.

Key words: small-overlap frontal crash, slide value, theoretical model, neural network, sensitivity analysis