为获得爆炸冲击波下人员胸部损伤机理,借助高保真数字假人模型(Total Human Model for Safety,THUMS),使用 Load_Blast_Enhanced 方法与任意拉格朗日欧拉(Arbitrary Lagrange-Euler,ALE)方法构建了人体-爆炸流场数值模型,对爆炸冲击波下人体胸部的损伤情况开展数值计算,结合爆炸事故验证模型的有效性;基于冲击波峰值超压准则和Axelsson损伤模型判别6个工况下人员伤情等级,发现仅在TNT当量1 500g、爆距4m时人员有轻伤风险.基于皮肤、骨骼、心肺的动态响应细致分析人员各组织器官的损伤类型,揭示了人员轻伤时的损伤模式及爆炸冲击波的致伤机理,研究结果可为爆炸致伤人员损伤评估的研究及相关防护装备的设计提供参考.
Abstract
In order to obtain the mechanism of chest injury under explosion shock waves,a high fidelity digital dummy model(total human model for safety,THUMS)was used to construct a numerical model of the human-explosion flow field using the Load_Blast_Enhanced method and the arbitrary Lagrange-Euler(ALE)method.The damage to the human chest under explosion shock waves was numerically calculated,and the effectiveness of the proposed model is verified by an explosion accident.Based on the peak overpressure criterion of shock waves and the Axelsson damage model,it was found that personnel injury levels were only at risk of minor injuries when TNT equivalent was 1 500 g and explosion distance was 4 m.Based on the dynamic response of skin,bones,heart and lungs,a detailed analysis of the types of injuries to various tissues and organs of personnel was conducted,revealing the injury patterns and mechanisms of explosion shock waves during minor injuries.The research results can provide reference for the assessment of injuries caused by explosions and the design of related protective equipment.
关键词
THUMS模型/爆炸冲击波/致伤机理/人体数值模拟
Key words
totalhuman model for safety/explosion shock wave/injury mechanism/numerical simulation of human body
维普
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