Head kinematics in mini-sled tests of foam padding:: Relevance of linear responses from free motion headform (FMH) testing to head angular responses
Head kinematics in mini-sled tests of foam padding:: Relevance of linear responses from free motion headform (FMH) testing to head angular responses
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DOI：
10.1115/1.1590360
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发表时间：
2003-08-01
影响因子：
1.7
通讯作者：
Parnaik, Y
中科院分区：
文献类型：
--
作者：
Ivarsson, J;Viano, DC;Parnaik, Y
修订后的联邦机动车安全标准（FMVSS）第201号规定，车辆上部内饰的安全性能是由自由运动人头模型（FMH）以6.7 m/s的速度撞击内饰的合成线性加速度响应确定的。本研究讨论了FMH测试的线性输出数据是否可用于选择降低旋转诱导脑损伤可能性的上部内部衬垫。使用由安装在小型雪橇平台上的Hybrid III头颈结构组成的实验装置，在低（类似于5.0 m/s）、中（类似于7.0 m/s）和高（类似于9.6 m/s）冲击速度下，测量了头部正面冲击不同刚度和密度的恒定厚度（51 mm）的泡沫样品时的矢状面线性和角头部加速度。如果泡沫样品没有触底，则记录的角加速度峰值和角速度变化随着峰值合成线加速度和头部损伤标准值（19936）的增加而近似线性地增加。结果表明，产生最低可能峰值角加速度和角速度峰值变化而不引起高峰力的衬垫是在FMH测试中产生最低可能Δ 36而不触底的衬垫。
The revised Federal Motor Vehicle Safety Standard (FMVSS) No. 201 specifies that the safety performance of vehicle upper interiors is determined from the resultant linear acceleration response of a free motion headform (FMH) impacting the interior at 6.7 m/s. This study addresses whether linear output data from the FMH test can be used to select an upper interior padding that decreases the likelihood of rotationally induced brain injuries. Using an experimental setup consisting of a Hybrid III head-neck structure mounted on a mini-sled platform, sagittal plane linear and angular head accelerations were measured in frontal head impacts into foam samples of various stiffness and density with a constant thickness (51 mm) at low (similar to5.0 m/s), intermediate (similar to7.0 m/s), and high (similar to9.6 m/s) impact speeds. Provided that the foam samples did not bottom out, recorded peak values of angular acceleration and change in angular velocity increased approximately linearly with increasing peak resultant linear acceleration and value of the Head Injury Criterion (HIC36). The results indicate that the padding that produces the lowest possible peak angular acceleration and peak change in angular velocity without causing high peak forces is the one that produces the lowest possible HIC36 without bottoming out in the FMH test.