Abstract:

It is the global research focuses on head protection during collision between car and pedestrian,when the HIC is constant the head acceleration waveform may be different,as a result the collision depth differs,Therefore,design of a reasonable body to control the head acceleration waveform can reduce head injury to a minimal degree under the same collision depth.The authors firstly analyzed the different characteristics of several common approximate acceleration waveforms,and found out an optimal curve,then used the simulation analysis of finite element software,by improving the structure of head collision area to achieve the optimization of head acceleration waveform,thus improving the head injury.

Key words: collisions between car and pedestrian, head acceleration waveform, collision depth, body design, simulation analysis

摘要：

人车碰撞过程中头部保护是国内外研究的一个重点，在HIC值相同的情况下头部加速度曲线可能千差万别,从而导致碰撞深度也有差异，因此,通过合理的车身结构设计来控制加速度曲线，可以保证在相同的碰撞深度下使头部伤害程度降低到最小。首先分析了几种常见的加速度近似波形的不同特性，并找出最优化的加速度曲线，然后借助有限元软件的仿真分析，通过对头部碰撞区域内的结构进行改进,
实现对头部加速度的优化，从而降低头部的伤害程度。
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关键词: 人车碰撞, 头部加速度曲线, 碰撞深度, 车身设计, 仿真分析