爆炸载荷下矩形板弹塑性动态响应研究

摘要

舰船结构在受到高强度爆炸载荷作用时的破坏形式主要是板架的塑性大变形和撕裂。对四边约束矩形板在爆炸冲击波载荷下的塑性大变形响应进行了理论分析和试验研究。基于板的大挠度变形理论和能量守恒原理，建立了矩形板在爆炸载荷作用下发生塑性大变形的弹塑性分析方法。将理论计算与试验及数值计算进行对比，表明弹塑性分析方法有较好的计算精度和适用性。可用于计算舰船局部结构对舱内爆炸冲击波的响应，为舰船的抗爆设计提供理论依据。%Major failure modes of ship structure subjected to high-intensity explosion loading are large plastic deformation and tear of stiffened plates. In this paper, theoretical and experimental studies on large plastic deformation of clamped rectangular plates under blast loads are conducted. An elastic-plastic analytical method for predicting dynamic response of rectangular plates is developed. Center displacement histories of rectangular plates are acquired. By comparing analytical results with experimental data and numerical results, it is shown that the proposed elastic-plastic method has relatively good accuracy and applicability, which can be applied to rapid assessment of dynamic response of local structures of warships under internal blast loads and to the blast resistance design of warships.