摘要
为了说明汽车碰撞中乘员能量分配关系,参考国际常用法规和新评价规程(NCAP)对假人伤害指标的评估提出了一种新的假人各部位划分方式并进行了能量关系和假人响应的相关推导。在此基础之上,以某一经过试验验证的计算机碰撞模型从时域和位移域两个角度对各部位ride-down能量和约束系统能量进行了定量计算和分析,比较了假人身体4部位的动态响应在峰值和时序上的差别和各部位能量、能量密度、ride-down效率的对比关系。最后对以胸部加速度替代整个假人加速度的传统方法和本文的划分方法进行了对比和误差分析,计算结果表明传统方法的能量相比本文的方法存在近10%的误差,并且不能够较好评估整体能量变化趋势尤其是峰值之后的能量变化。研究结果对于深入理解人体各部位能量分配关系、响应以及约束系统的正确设计具有指导意义。
In order to illustrate the energy distribution of passenger during vehicle crash, a new division of dummy was proposed based on the regulation and NCAP （New Car Assessment Programme） on dummy injury criterion both in home and abroad. Some formula about response and energy of each part of a dummy was developed. On this basis, one computer model verified by test was simulated to analyze the ride-down energy and restraint system energy in time and displacement domain. Dynamic response and energy, energy density, ride-down efficiency of four parts of dummy was compared. Finally, the traditional method in which the acceleration of the whole dummy was replaced by the chest acceleration was compared with the new method. The results show that the traditional method produces approximately 10% error, and is not be able to assess the energy change trends, especially after the peak value. The research results have significance in understanding the responses, energy distribution of all parts of the human body, as well as the proper restraint system design.
出处
《汽车安全与节能学报》
CAS
2010年第1期23-29,共7页
Journal of Automotive Safety and Energy
基金
国家"八六三"高技术项目(2006AA110102)
