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摘要: 通过建立简化的人体胸部三维有限元模型,模拟爆炸冲击波与人体胸部作用,根据人体胸部各个 器官的不同,选择合理的材料模型和参数,提出LS-DYNA有限元程序局部平面波改进方法,研究爆炸冲击波 与人体胸部作用的力学过程。依据人体胸部各个器官运动的速度差,预测创伤的区域分布;给出肺模型的压、 拉应力及剪切应力的变化规律,分析肺的创伤区域的分布,与解剖实验结果基本一致。对比Bowen创伤曲 线,证明人体胸部三维有限元模型可以有效得到冲击波创伤特征。Abstract: Asimplifiedthree-dimensionalfiniteelementmodelforhumanthoraxeswasestablishedand thepropermaterialmodelsandparameterswereselectedforthedifferentthoraxorgans.Themechanicalinteractionoftheblastwavesandthethoraxwasexploredbytheself- developedlocal-planewave methodbasedonLS-DYNA.Accordingtothespeeddifferencesbetweenthedifferentorgans,the traumadistributionswerepredicted.Thetraumadistributionsofthelungorganswereanalyzedwith theaidofthevariationsofcompressive,tensileandshearstressesinthelungmodel.Thesimulated resultsareconsistentwiththeanatomyexperimentalresultsandthecalculatedresultsbytheInjury code.Sothemethodproposediseffectiveandprecisetosimulatethetraumacharacteristicsofhuman thoraxessubjectedtoblastshockwavesanditcanprovideaneffectiveapproachtotheresearcheson theblasttrauma.
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