正面碰撞后排假人颈部力学响应分析与应用

The Analysis and Application of the Neck Mechanical Response of Rear Seat Dummy in Frontal Crash

目前车辆在正面碰撞过程中后排假人颈部失分严重,相关研究较少,开发过程缺少科学指导和工程经验。因此,本文中根据对后排假人在碰撞过程中颈力学响应过程的解析分析,获得后排假人颈部力的等效计算公式,分析假人颈部力的组成部分和伤害来源,以及假人主要部位的理想运动趋势和设计目标;然后建立设计目标与后排约束系统设计参数之间的相关性,用以指导后排约束系统的参数设计,达到降低后排假人颈部力的目标。最后将该方法应用于某A类乘用车后排乘员约束系统的改进设计。

At present, the scores of rear seat dummy neck in frontal crash is particularly low, and in thisrespect, little research has been done and vehicle development process lacks scientific guidance and engineering experiences.In view of this, based on the analytical analysis on neck mechanical responses in the crash process ofrear seat dummy, the equivalent neck force formula of rear seat dummy is derived, the constituent and injurysources of dummy neck force as well as the ideal motion trend and design goal of main dummy parts are analyzed.Then the correlations between design goal and design parameters of rear seat restraint system are established to guidethe parameter design of rear seat restraint system and attain the objective of reducing neck force of rear seat dummy.Finally the method adopted is applied to the modification design of the rear seat occupant restraint system of a class-A car.