护栏薄壁长杆贯穿胸部的损伤研究

doi:10.16265/j.cnki.issn1003-3033.2019.04.005

摘要/Abstract

摘要： 为再现城市道路矩形隔离护栏与汽车碰撞时形成的薄壁长杆穿透驾驶员胸部的损伤机制和贯穿过程,采用医学软件Mimics与工程软件Hypermesh相结合,建立准确的人体胸部骨骼组织几何模型和有限元胸部生物力学模型,并运用LS-DYNA模拟仿真与计算;利用事故案例和医学案例验证仿真试验结果;类比子弹侵彻损伤效应分析护栏薄壁长杆贯穿人体胸部的损伤机制。结果表明:护栏薄壁长杆贯穿人体胸部前后肋骨发生断裂以及胸部其他处发生骨折情况,与医学案例和事故案例吻合较好;胸部贯穿损伤程度与薄壁长杆速度、稳定性以及质量因素有关;该试验可满足胸部贯穿伤医学研究需要。

关键词: 护栏薄壁长杆, 胸部生物模型, 贯穿伤, 有限元分析, 类比法, 损伤机制

Abstract: This paper aims to reconstruct the damage mechanism and penetration process of the thin-walled long rod penetrating the driver's chest when the rectangular road barrier collides with the car. By combining medical software Mimics with engineering software Hypermesh, an accurate geometric model of human thoracic skeletal tissue and a finite element chest biomechanical model were established, and the simulation and calculation experiments were carried out by using LS-DYNA. The results of simulation experiments were verified by accident cases and medical cases. The damage mechanism of thin-walled long rod penetrating human chest was analyzed by analogy with that of bullet penetration injury effect. The results show that the fracture of ribs and other fractures occurred in the chest before and after the long wall of the barrier penetrate the driver's chest are in good agreement with medical cases and accident cases, that the degree of chest penetration injury is related to the speed, stability and quality factors of thin-walled long rod, and that this experiment can meet the needs of medical thoracic penetrating injury research.

Key words: thin-walled long rod of guardrail, chest biological model, penetrating injury, finite element analysis, analogy method, damage mechanism

中图分类号:

X910

支治, 郭世永. 护栏薄壁长杆贯穿胸部的损伤研究[J]. 中国安全科学学报, 2019, 29(4): 25-30.

ZHI Zhi, GUO Shiyong. Study on damage of thin-walled long rod of guardrail penetrating chest[J]. China Safety Science Journal, 2019, 29(4): 25-30.

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