气囊式头盔防护下的两轮车骑车人头部损伤风险分析
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湖南省湘潭市雨湖区湖南科技大学

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    摘要:

    目的 提出一种气囊式头盔缓冲内衬结构,并分析其对两轮车骑车人头部损伤的防护效果。方法 将气囊式内衬应用于自行车(半盔)和摩托车(全盔)两款典型的两轮车骑车人头盔,通过标准GB 24429-2009和法规ECE R22.05测试工况下的有限元碰撞仿真获得人体头部模型运动学和生物力学响应,从颅骨骨折和颅脑损伤风险角度对比常规EPS头盔综合评价气囊式头盔的防护性能。结果 当气囊压力为0.06MPa时,气囊式头盔(半盔/全盔)防护下的人体头部颅骨骨折相关量分别小于120g和150g,颅骨骨折风险基本低于40%;颅脑最大主应变均小于0.3,轻度脑损伤风险均低于25%;气囊式头盔防护下的人体颅骨骨折和颅脑损伤风险均低于EPS头盔。结论 本文设计的气囊式头盔具有较好的防护效果,能兼顾颅骨骨折和颅脑损伤防护,可以为头盔设计提供参考。

    Abstract:

    Objective To propose an airbag-type helmet cushioning lining structure and analyze its protective effect on the head injury of two-wheeled bicycle riders. Methods The airbag lining was applied to two typical two-wheeled bicycle helmets for bicycles (half helmets) and motorcycles (full helmets). Then kinematic and biomechanical responses of the human head model were predicted from impact simulations under the test conditions of the standard GB 24429-2009 and the regulations ECE R22.05, which were employed for comprehensively evaluation of the protective performance of the airbag helmet from the perspective of skull fracture and brain injury risk compared with conventional EPS helmets. Results When the airbag pressure was 0.06MPa, the relevant amount of human skull fracture under the protection of airbag helmet (half helmet/full helmet) is less than 120g and 150g, respectively; the risk of skull fracture is basically lower than 40%; the maximum principal strains of the brain are both less than 0.3, which indicate that the risk of mild brain injury is less than 25%.Generally, the risk of human skull fracture and head injury under the protection of airbag helmets is lower than that of EPS helmets. Conclusion The airbag helmet designed in this paper has a good protective effect, can be taken into account for protection of skull fracture and head injury, and can provide a reference for helmet design

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  • 收稿日期:2021-06-01
  • 最后修改日期:2021-07-22
  • 录用日期:2021-08-03
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