PDF(Pubmed)
Abstract：
In this study, to discuss the influence of concussion risk from the long-term use of American football helmets on collegiate teams, accident cases during the game are replicated based on game videos by simulations using whole-body numerical models and helmeted finite element human head models. The concussion risks caused by collisions were estimated using the mechanical parameters inside the skull obtained from finite element analyses. In the analyses, the different material properties of helmets identified by free-fall experiments using headform impactor-embedded helmets were used to represent brand-new and long-term-use helmets. After analyzing the five cases, it was observed that wearing a new helmet instead of a long-term-use one resulted in a reduction in the risk of concussion by 1 to 44%. More energy is attenuated by the deformation of the liners of the brand-new helmet, so the energy transferred to the head is smaller than that when wearing the long-term-use helmet. Thus, the long-term use of the helmet reduces its ability to protect the head.
摘要：
在这项研究中,为了讨论长期使用美式足球头盔对大学球队的脑震荡风险的影响，通过使用全身数值模型和头盔有限元人体头部模型进行模拟，根据游戏视频复制游戏过程中的事故案例。使用从有限元分析获得的颅骨内部的机械参数来估计由碰撞引起的脑震荡风险。在分析中，通过使用头型撞击器嵌入式头盔的自由落体实验确定的头盔的不同材料特性被用来代表全新和长期使用的头盔。在分析了这五个案例后，观察到戴新头盔而不是长期使用头盔可使脑震荡风险降低1-44%.全新头盔衬垫的变形会衰减更多的能量，因此，传递到头部的能量小于佩戴长期使用头盔时的能量。因此，长期使用头盔会降低其保护头部的能力。
