基于C-NCAP某座椅鞭打试验仿真和优化

Simulation and Optimization of a Seat Whip-lash Test Based on C-NCAP

按照2021版C-NCAP要求,对某车型座椅进行鞭打试验,通过鞭打试验结果分析发现挥鞭伤较为严重,鞭打得分较低。针对这一问题采用Hypermesh软件建立有限元模型,用LS-Dyna显示非线性动力学求解器进行求解,并将有限元结果与试验结果进行对标分析。在对标合格的有限元模型基础上分析鞭打损伤原因,并根据分析结果提出优化参数,优化参数如下:座椅靠背左右侧板厚度、座椅靠背支撑板厚度、座椅靠背上横杆厚度以及头枕杆直径。根据优化后的结果可知,优化后的假人挥鞭伤减小,鞭打得分提高,大大增强了座椅防挥鞭伤的能力。

According to the requirements of the 2021 version of C-NCAP, a whipping test was carried out on the seat of a certain model, and the whiplash injury was found to be more serious and the whiplash score was lower through the analysis of the whiplash test results. To solve this problem, Hypermesh software is used to establish a finite element model, LS-Dyna is used to display the nonlinear dy-namics solver, and the finite element results are benchmarked with the experimental results. Based on the qualified finite element model, the cause of whiplash damage is analyzed, and the op-timization parameters are proposed according to the analysis results, as follows: the thickness of the left and right side panels of the seat back, the thickness of the seat back support plate, the thickness of the crossbar on the seat back and the diameter of the headrest rod. According to the optimized results, the optimized dummy whiplash injury is reduced and the whiplash score is im-proved, so the seat’s anti-whiplash ability is greatly improved.