Zhang Jiangyue, Yoganandan Narayan, Pintar Frank A, Gennarelli Thomas A
Department of Neurosurgery, Medical College of Wisconsin, VA Medical Center, Milwaukee, WI, USA.
Annu Proc Assoc Adv Automot Med. 2006;50:1-12.
The purpose of this research was to use vehicle impact test data and parametric finite element analysis to study the contribution of translational accelerations (TransAcc) and rotational accelerations (RotAcc) on strain-induced head injuries. Acceleration data were extracted from 33 non-contact vehicle crash tests conducted by the US Department of Transportation, National Highway Traffic Safety Administration. A human finite element head model was exercised using head accelerations from the nine accelerometer package placed inside the driver dummy in these tests. Three scenarios were parameterized: both TransAcc and RotAcc, only TransAcc, and only RotAcc to demonstrate the contribution of these accelerations on brain injury. Brain strains at multiple elements, cumulative strain damage, dilatation damage, and relative motion damage data were compared. Rotational accelerations contributed to more than 80% of the brain strain. Other injury metrics also supported this finding. These findings did not depend on the crash mode, peak amplitude of translational acceleration (29 to 120 g), peak amplitude of rotational acceleration (1.3 to 9.4 krad/s ( 2 ) ) or HIC (68-778). Rotational accelerations appeared to be the major cause of strain-induced brain injury.
本研究的目的是利用车辆碰撞试验数据和参数化有限元分析，研究平移加速度（TransAcc）和旋转加速度（RotAcc）对应变诱发头部损伤的作用。加速度数据取自美国运输部国家公路交通安全管理局进行的33次非接触式车辆碰撞试验。在这些试验中，使用放置在驾驶员假人内部的九个加速度计组件测得的头部加速度，对人体有限元头部模型进行模拟。设定了三种参数化情景：同时考虑TransAcc和RotAcc、仅考虑TransAcc、仅考虑RotAcc，以证明这些加速度对脑损伤的作用。比较了多个单元处的脑应变、累积应变损伤、膨胀损伤和相对运动损伤数据。旋转加速度导致的脑应变超过80%。其他损伤指标也支持这一发现。这些发现不依赖于碰撞模式、平移加速度的峰值幅度（29至120 g）、旋转加速度的峰值幅度（1.3至9.4 krad/s²）或头部损伤标准值（HIC，68 - 778）。旋转加速度似乎是应变诱发脑损伤的主要原因。
