Rush G Alston, Prabhu R, Rush Gus A, Williams Lakiesha N, Horstemeyer M F
Agricultural and Biological Engineering, Mississippi State University; Center for Advanced Vehicular Systems, Mississippi State University.
Agricultural and Biological Engineering, Mississippi State University;
J Vis Exp. 2017 Feb 19(120):53929. doi: 10.3791/53929.
A modified National Operating Committee on Standards for Athletic Equipment (NOCSAE) test method for American football helmet drop impact test standards is presented that would provide better assessment of a helmet's on-field impact performance by including a faceguard on the helmet. In this study, a merger of faceguard and helmet test standards is proposed. The need for a more robust systematic approach to football helmet testing procedures is emphasized by comparing representative results of the Head Injury Criterion (HIC), Severity Index (SI), and peak acceleration values for different helmets at different helmet locations under modified NOCSAE standard drop tower tests. Essentially, these comparative drop test results revealed that the faceguard adds a stiffening kinematic constraint to the shell that lessens total energy absorption. The current NOCSAE standard test methods can be improved to represent on-field helmet hits by attaching the faceguards to helmets and by including two new helmet impact locations (Front Top and Front Top Boss). The reported football helmet test method gives a more accurate representation of a helmet's performance and its ability to mitigate on-field impacts while promoting safer football helmets.
本文提出了一种经修改的美国国家运动器材标准操作委员会（NOCSAE）美式橄榄球头盔落震冲击测试方法标准，该方法通过在头盔上安装面罩，能更好地评估头盔在赛场上的冲击性能。在本研究中，提出了面罩和头盔测试标准的合并方案。通过比较在经修改的NOCSAE标准落塔测试下，不同头盔在不同头盔位置的头部损伤标准（HIC）、严重程度指数（SI）和峰值加速度值的代表性结果，强调了采用更稳健的系统方法进行橄榄球头盔测试程序的必要性。本质上，这些对比落震测试结果表明，面罩给外壳增加了一个刚性运动约束，减少了总能量吸收。当前的NOCSAE标准测试方法可以通过将面罩连接到头盔上，并增加两个新的头盔冲击位置（前顶部和前顶部凸起）来改进，以代表赛场上头盔的撞击情况。所报道的橄榄球头盔测试方法能更准确地反映头盔的性能及其减轻赛场撞击的能力，同时推广更安全的橄榄球头盔。
