正面碰撞中乘员小腿伤害的优化分析  

Optimization analysis of dummy tibia injury in frontal impact

作　　者：田涌君 张亚军[1] 曾必强[1] 

机构地区：[1]中国汽车技术研究中心,天津300162

出　　处：《机电工程》2015年第6期812-816,共5页Journal of Mechanical & Electrical Engineering

摘　　要：针对某车型正面碰撞滑车试验过程中假人小腿失分问题,基于多次滑车匹配试验数据进行了研究,分析了正面碰撞中假人小腿伤害机理和汽车实际碰撞中假人小腿伤害超标问题。根据试验数据建立了有限元分析模型并对基础滑车试验进行了仿真对标,验证了模型有效性。结合试验数据及仿真结果分析了假人小腿失分原因,并对歇脚板区域进行了结构优化以改进小腿得分,最后通过滑车试验验证了方案可行性。研究结果表明,依据滑车试验数据所建立有限元仿真分析模型可预测假人运动姿态及伤害值;通过优化脚部缓冲垫的结构与材料强度,提高缓冲垫的吸能效果来减小小腿伤害,可达到结构优化目的,从而为改进小腿得分、提高车辆碰撞星级提供了参考。Aiming at losing-points of dummy tibia in frontal sled test, the dummy tibia damage mechanism in frontal crash and dummy tibia injury in actual collision was analyzed based on several sled tests. Finite element model was established based on the experimental statistics and was verified. The reasons of losing-points of dummy tibia were analyzed based on the test data and the simulation results. The structure of the footrests was optimized to improve the score of tibia. The feasibility of the scheme was verified by sled test finally. The results indicate that the FE model based on the sled test data can predict the dummy＇s movement and injury. The foot cushion structure and material strength are optimized to decrease the tibia injury by improving energy-absorbing of the cushion. The structure optimization can offer reference to the star-improving of the vehicle impact.

关 键 词：正面碰撞 小腿伤害 滑车试验 仿真 

分 类 号：U461.91[机械工程—车辆工程] TH122[交通运输工程—载运工具运用工程]