【摘要】 本文提出了一个由双层线性粘弹性固体球壳充以线性粘弹性流体所形成的人头颅力学模型,考虑了头颅的外皮层在受撞击时的作用。用粘弹性动力学对应原理,导出了波的传播方程。分析结果表明:1.脑区最大正压位于撞击点,而最大负压出现在对侧点;2.分析结果证实了脑在撞击荷载作用下的空化损伤理论;3.皮层对于提高头颅的刚度、衰减冲击能量、缓解撞击引起的脑损伤具有重要作用。更多还原

【Abstract】 <ABSTRACT>A mechanical model of a linear viscoelastic double-layered shellfilled with linear viscoelastic fluid is introduced for mechanical anal-ysis of human skull under impact. The outerlayer of the model simulatesthe skin of a skull. A wave-propagating equation is introduced based oncorrespondence principle of viscoelastic dynamics. The results show:1. The maximum positive pressure occurs in the site of impact, while themaximum negative pressure appears in the reflex area of the wave ; 2. The results verify the cavity-injury theory of brain under impact; 3. The skin of askull is important fot relaxing the injure of brain by impact since it cauraise the stiffness of a skull and resorb the energy of impact.Keywords: Skull; impact; viscoelastic dynamics; correspondence principle; neg-ative pressure; injurye of brain更多还原