摘要
针对某驾驶员座椅在鞭打试验中颈部伤害值过大问题,总结C-NCAP(2015版)鞭打试验评价规程和评分原则,研究了颈部伤害指标与假人颈部运动响应的相关性。结合影响鞭打试验性能的座椅参数分析了该座椅鞭打试验失分原因。按照C-NCAP鞭打试验具体规则,建立了该座椅鞭打的有限元分析模型,并与摸底试验结果进行对标验证,验证了模型的有效性。在该模型基础上,进行了座椅结构的仿真优化改进。研究结果表明,有限元仿真模型计算的颈部伤害曲线趋势、峰值大小与试验基本一致,所建立的仿真模型能较好地预测试验中的假人颈部运动响应;通过优化头枕及靠背上部刚度值和减小头部和座椅头枕间的水平距离,减小头部相对人体躯干运动,可显著改善鞭打试验中颈部伤害,实现设计目标。
Aiming at dummy＇s large neck injury in a whiplash test for a driver seat,the C-NCAP（2015）whiplash test procedures and rating principles were summarized and the correlation between the neck injury criteria and the dummy neck movement response was studied.The reason for losing in whiplash test was analyzed combined with the parameters affecting the seat whiplash performance. Finite element model of the seat was built up and verified based on the diagnostic test results. The optimization design of the seat structure was done based on the verified model. The results indicate that the trend and peak of the neck injury curvesare consistent with the test so that the built-up model can predict the dummy neck movement response. The neck injury in whiplash test can be significantly improved by optimizing the headrest and upper back stiffness and reducing the horizontal distance between the head and headrest to achieve the design target.
出处
《机电工程》
CAS
2015年第2期190-195,共6页
Journal of Mechanical & Electrical Engineering
基金
浙江省新苗人才计划资助项目(A00161114200)
