正碰下6岁儿童乘员的胸部运动学方程与损伤风险分析  

Kinematic equation and injury risk analysis of the chest of 6-year-old child occupant under frontal crash

作　　者：叶凡 王丙雨 韩勇 叶赛峰 余意 YE Fan;WANG Bingyu;HAN Yong;YE Saifeng;YU Yi(School of Mechanical and Automotive Engineering,Xiamen University of Technology,Xiamen 361024,China)

机构地区：[1]厦门理工学院机械与汽车工程学院,厦门361024

出　　处：《汽车安全与节能学报》2022年第4期617-624,共8页Journal of Automotive Safety and Energy

基　　金：国家自然科学基金(51775466);福建省自然科学杰出青年科学基金(2019J06022)。

摘　　要：为厘清正面碰撞中6岁儿童乘员胸部损伤机理,基于ECE R129法规,选取某款儿童约束系统(CRS),对比Hybrid Ⅲ 6YO假人模型与THUMS 6YO人体有限元模型在正面碰撞中的运动学响应与损伤指标的差异;用Hybrid Ⅲ 6YO假人模型,建立胸部动力学方程,分析正碰中内外力对胸部加速度的影响;对THUMS 6YO人体有限元模型的肋骨、心脏和肺部的应变进行分析,得出儿童乘员的胸部损伤风险。结果表明:Hybrid Ⅲ 6YO假人模型所受到的颈部力与安全的肩带力对胸部加速度的影响较大。THUMS 6YO人体有限元模型的胸部质心合成加速度52.1g,Hybrid Ⅲ 6YO假人模型的加速度38.8g,两者均低于法规规定的参考数值。This paper aimed at clarifying the thoracic injury mechanism of 6-year-old child occupants in frontal crashes. A child restraint system(CRS) was selected based on the ECE R129 regulation. The differences between the Hybrid Ⅲ 6YO dummy model and the THUMS 6YO human finite element model were compared of the kinematic response and of the injury indicators. Thoracic kinetic equations were established on the Hybrid Ⅲ 6YO dummy model to analyzed the effects of internal and external forces on the thorax acceleration in frontal crashes, and to analyzed the strains on the ribs, the heart and the lungs of the THUMS 6YO human finite element mode, before deriving the thoracic injury risk to the child occupants. The results show that the neck force and the safe shoulder belt force on the Hybrid Ⅲ 6YO dummy model have a greater effect on the chest centroid synthesis acceleration. The chest centroid synthesis acceleration achieves 52.1g for the THUMS 6YO human finite element model, and 38.8g for the Hybrid Ⅲ 6YO dummy model, both are below the regulatory reference values.

关 键 词：汽车安全 正面碰撞 6岁儿童 胸部损伤 HybridⅢ6YO假人模型 THUMS 6YO人体有限元模型 

分 类 号：U461.99[机械工程—车辆工程]