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首页> 外文期刊>Journal of biomechanical engineering. >Dependence of the Head Injury Criterion and Maximum Acceleration on Headform Mass and Initial Velocity in Tests Simulating Pedestrian Impacts With Vehicles
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Dependence of the Head Injury Criterion and Maximum Acceleration on Headform Mass and Initial Velocity in Tests Simulating Pedestrian Impacts With Vehicles

机译：模拟车辆行人撞击的测试中头部伤害标准和最大加速度对头部质量和初始速度的依赖性

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摘要

Impact testing of pedestrian headforms is usually conducted at one velocity and with one mass of headform, but real impacts occur at a range of velocities and masses. A method is proposed to predict the Head Injury Criterion (HIC) and similar quantities at other velocities from their values observed under test conditions. A specific assumption is made about acceleration during the impact as related to displacement, its differential (instantaneous velocity), mass of headform, and initial velocity: namely, that it is the product of a power function of displacement (representing a possibly nonlinear spring) and a term that includes a type of damping. This equation is not solved, but some properties of the solution are obtained: HIC, maximum acceleration, and maximum displacement are found to be power functions of mass of headform and initial velocity. Expressions for the exponents are obtained in terms of the nonlinearity parameter of the spring. Simple formulae are obtained for the dependence of HIC, maximum acceleration, and maximum displacement on velocity and mass. These are relevant to many types of impact.
机译：行人头模的冲击测试通常以一种速度和一种质量的头模进行，但是实际冲击发生在一定范围的速度和质量下。提出了一种方法，可以根据在测试条件下观察到的值来预测其他速度下的头部受伤标准（HIC）和类似量。对于冲击过程中的加速度，与位移，其微分（瞬时速度），头模质量和初始速度有关，做出了一个特殊的假设：即，它是位移的幂函数的乘积（表示可能是非线性弹簧）以及包含阻尼类型的术语。这个方程没有解决，但是获得了解决方案的一些特性：HIC，最大加速度和最大位移是头形质量和初始速度的幂函数。根据弹簧的非线性参数获得指数的表达式。对于HIC，最大加速度和最大位移对速度和质量的依赖性，获得了简单的公式。这些与许多类型的影响有关。

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