点蚀损伤钢板在空爆冲击波载荷作用下的动态响应研究

Response of corroded steel plates due to air blast load

为探讨固支点蚀损伤钢板结构在空爆冲击波载荷作用下的动态响应,利用有限元分析软件Ansys/LSDYNA,开展了空爆冲击波对固支点蚀钢板板的毁伤作用数值模拟计算,探讨了点蚀损伤深度、点蚀损伤分布密度及点蚀损伤分布位置对固支钢板结构在空爆冲击波载荷作用下动态响应的影响。结果表明,点蚀损伤深度、点蚀损伤分布密度均对板的动态承载能力有较显著影响,而点蚀损伤分布位置则影响非常小。

The main objective of this study is to explore the dynamic response of a clamped square steel plate with corrosion pits under the air blast loads. Through finite element program Ansys/LS-DYNA, simulations of the response behavior of the corroded plate subjected to the blast loading are conducted. The effects of influential parameters including, degree of pit, pit depth, and different corrosion patterns at each side of the plate, in both-sided corroded plates. The results show that by increasing degree of pitting and depth of pits can cause the most reduction of dynamic load carrying capacity, whereas position of pitted surface in respect to applied loading affects the dynamic load carrying capacity of corroded plates insignificantly.