正面碰撞设计中约束系统优化工况选择

摘要

2012版C-NCAP碰撞工况中的40％偏置碰撞的试验速度由56km／h提升至64km／h，而100％刚性壁正碰仍保持50km／h．两者之间巨大的速度差，使约束系统的匹配变得更加困难。文章通过分析2款轿车和1款运动型乘用车的碰撞工况，采用仿真和台车试验的手段对乘员约束系统进行优化设计，使车辆碰撞安全性能得到优化。指出按乘员伤害值、约束系统能耗密度及能耗功率大小选定最坏碰撞模式，依此设定约束系统参数，在另一碰撞模式中加以验证的约束系统设计方法。%In 2012 version of C-NCAP, crash velocity will be increased from 56 km/h to 64 km/h of 40% ODB mode, and velocity of full FRB mode is still 50 km/h. Great velocity differences make the restraint system match more difficult than before. In this paper impact condition of two cars and a SUV is analyzed. By using simulation and sled test optimization design of restraint system is condueted to optimize the vehicle erashwonhiness. It is indicated that according to occupants＇ injury, values, restraint system energy density and energy power the worst impact mode is selected, so that the estraint system parameters is determined. The design method of restraint system is validated in the other impact mode.