水下爆炸作用下船用加筋板动态响应特性分析

Dynamic response characteristics of stiffened plates subjected to underwater blast loading

加筋板作为船体结构的重要组成部分,其抗爆防护性能是衡量舰船生存能力的重要指标.文中利用有限元仿真软件LS-DYNA对水下爆炸冲击作用下船用加筋结构的动态响应特性及抗爆防护性能进行了研究.研究结果表明:水下爆炸冲击作用下加筋板的最大应变位于肋板所在位置,肋板结构类型是影响加筋板的变形响应速度及塑形变形幅值的重要因素.在相同面密度条件下,双层底加筋结构可有效提升结构整体的抗爆防护性能,相对于单层底加筋结构防护性能提高了30.15%.

The stiffened plate is an important component of hull structure.The blast resistance of ships is an important indicator of survivability.In this study,the dynamic response characteristics and blast resistance of stiffened structures subjected to underwater blast shock loading are investigated with the finite element software LS-DYNA.The results show that the maximum strain of the plate is observed in the position where the stiffener is mounted.The structure type of the stiffener is an important factor affecting the response velocity and deformation amplitude of the stiffened structure.The blast resistant property of double-deck stiffened plates is effectively improved by 30.15%compared with that of single-deck stiffened plates in the condition of the same areal mass density