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基于正面碰撞实验的胸部损伤有限元分析

肖森 杨济匡 肖志 Jeff R. Crandally

肖森, 杨济匡, 肖志, Jeff R. Crandally. 基于正面碰撞实验的胸部损伤有限元分析[J]. 力学学报, 2017, 49(1): 191-201. doi: 10.6052/0459-1879-16-088
引用本文: 肖森, 杨济匡, 肖志, Jeff R. Crandally. 基于正面碰撞实验的胸部损伤有限元分析[J]. 力学学报, 2017, 49(1): 191-201. doi: 10.6052/0459-1879-16-088
Xiao Sen, Yang Jikuang, Xiao Zhi, Jeff R. Crandally. ANALYSIS OF CHEST INJURY IN FRONTAL IMPACT VIA FINITE ELEMENT MODELLING BASED ON BIOMECHANICAL EXPERIMENT[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(1): 191-201. doi: 10.6052/0459-1879-16-088
Citation: Xiao Sen, Yang Jikuang, Xiao Zhi, Jeff R. Crandally. ANALYSIS OF CHEST INJURY IN FRONTAL IMPACT VIA FINITE ELEMENT MODELLING BASED ON BIOMECHANICAL EXPERIMENT[J]. Chinese Journal of Theoretical and Applied Mechanics, 2017, 49(1): 191-201. doi: 10.6052/0459-1879-16-088

基于正面碰撞实验的胸部损伤有限元分析

doi: 10.6052/0459-1879-16-088
基金项目: 

国家自然科学基金 51475154

详细信息
    通讯作者:

    杨济匡, 教授, 主要研究方向:车辆碰撞安全及人体损伤生物力学.E-mail:jikuangyang@hnu.edu.cn

  • 中图分类号: U461.91

ANALYSIS OF CHEST INJURY IN FRONTAL IMPACT VIA FINITE ELEMENT MODELLING BASED ON BIOMECHANICAL EXPERIMENT

  • 摘要: 安全带的逐步使用极大地提高了车内乘员的安全性,但最近的交通事故研究表明,在正面碰撞工况下,乘员胸部损伤的防护效率还需要进一步提升.利用已验证生物逼真度的人体有限元模型和PMHS(post mortem human subjects)实验结果,建立配有安全带的乘员有限元分析模型,研究在不同碰撞工况下安全带定位设计参数对胸部变形量和肋骨应力应变响应等损伤相关物理参数的影响,并提出在安全设计中为改进防护效率,有效减少胸部损伤风险的一种虚拟试验方法.参考PMHS实验,基于全球人体有限元模型建立了一个基准佩带有限元人体模型,结合实验中测试的运动学响应、安全带的拉伸力和胸部变形量指标验证其生物逼真度.通过参数分析研究正面碰撞中安全带高度位置、安全带角度和碰撞速度对乘员胸部损伤的影响.结果表明胸廓应力应变分布及胸部变形量对安全带的高度位置更加敏感,基于安全带设计参数变化预测的胸部变形量宏观指标和应力应变的微观指标的变化趋势一致.对乘员安全带相关的胸部损伤研究提供虚拟设计分析方法,相关胸部损伤机理的研究结果可为今后约束系统的优化设计提供参考.

     

  • 图  1  载荷条件(a),包含标志点信息的实验侧视图(b) 和包含定位角 度信息的有限元模型侧视图(c)

    Figure  1.  Impact pulse (a), side view of the reference frontal experiment with marks (b) and FE model with reference position angles (c)

    图  2  胸腔测量点与安全带相对关系(左上UL,右上UR, 左下LL,右下LR)

    Figure  2.  Relative position between chest measuring point and seatbelt (upper left (UL),upper right (UR),lower left (LL),lower right (LR))

    图  3  安全带特性参数

    Figure  3.  Property parameters of the seatbelt

    图  4  基准有限元模型的运动轨迹验证

    Figure  4.  Kinematics validation of baseline FE model

    图  5  基准有限元模型胸部峰值变形量的验证(橙色点为仿真值)

    Figure  5.  Chest deflection validation of baseline FE model

    图  6  基准有限元模型安全带力的验证

    Figure  6.  Seatbelt force validation of baseline FE model

    图  7  研究参数对四测量点胸部峰值变形量结果的影响 (+ 扩展,- 压缩)

    Figure  7.  Peak chest deflection (+extension, -compression) sensitivity with study parameters

    图  8  胸廓应力,应变分布示意(40 km/h,@115 ms)

    Figure  8.  Schematic of the ribcage stress and strain distribution (40 km/h, @115 ms)

    表  1  胸部骨骼和主要器官材料的基本参数

    Table  1.   Material parameters of the bones and main organs in the chest

    表  2  基于3 个研究参数的胸部损伤实验设计矩阵

    Table  2.   Chest injury DOE simulation matrix based on three study parameters

    表  3  随安全带变化的胸腔应力应变极值情况(40 km/h, @115 ms)

    Table  3.   The peak value of ribcage strain and stress with the change of seatbelt parameters (40 km/h, @ 115 ms)

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出版历程
  • 收稿日期:  2016-04-05
  • 修回日期:  2016-10-28
  • 网络出版日期:  2016-11-01
  • 刊出日期:  2017-01-18

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