冲击波和高速破片联合作用下固支方板毁伤效应数值模拟

Numerical simulation of the damage effects of clamped square plate subjected to the impact of blast wave and fragments

为探讨固支方形钢板结构在空爆冲击波和高速破片联合作用下的动态响应过程及变形破坏模式,利用有限元分析软件ANSYS/LS-DYNA,开展了空爆冲击波和高速破片对固支方板的联合作用数值模拟计算,阐述了固支方板在联合载荷作用下动态响应过程的2个阶段,以及在不同爆距下的变形破坏模式和特点。结果表明,随着爆距增加,在破片密集作用区内,钢板的破坏模式存在从集团冲塞破口到部分穿孔边界撕裂联通,再到无穿孔边界撕裂现象的转换。

The main objective of this study was to explore the dynamic response and damage pattern of a clamped square steel plateunder the synergy effect of blast and fragments loading.A numerical-simulation tool was used to further study the combined blast and fragments loading effects on a clamped square steel plate.Through finite element program ANSYS/L/-DYNA,simulations of the response behavior and damage pattern of the plate subjected to the combined blast and fragments loading were conducted.Large punched hole caused by the dense fragment cluster will form in the intensively impacted area under proper launch distance.As launch distance increases,large deformation is the main failure modes of the plate,combined with numbers of perforation holes but no large punched hole.