Explosion Shock Wave For Small Missile Target Destructive Analysis

This dissertation regarded the simplified shell model of the typical anti-tank missile as the research object. Based on the research achievements of the predecessors and rigid-plastic model assumption, the dynamic response equation involving the structure of wing sheet and the cylindrical shell of the structure under the situation of the blast loading were derived. Using the multi material Euler algorithm in the simulation software, the flow field parameters of the explosive blast created by a linear explosive structure was analyzed. Then, numerical simulation based on the Euler-Lagrange coupling Algorithm has been carried out for structures, including fixed cantilever thin-slab structure, free-free cylindrical shell structure and the dynamic response of whole missile shell, under the explosive blast.The dissertation analyzed the structural characteristics and vulnerability of the typical anti-tank guided missiles firstly, and then introduced the theory of the explosive blast, numerically calculated the parameters of air shock wave which produced by the linear structure charge explosive through the AUTODYN simulation software. Then the plastic dynamic response of the thin-slab structure which simplified by a missile wing under explosive blast impact loading was analyzed, and numerically simulated the interaction processing of blast loading impacted on the fixed support wing sheet, the deformation of the wing sheet was gained. Then the equations of the cylindrical shell’s dynamic response under localized impact loading were derived. Some simulations were carried out by ANSYS-AUTODYN, through those simulations the plastic deformation response of the cylindrical shell under different strength and width blast loading was researched. Finally the integral numerical simulation model of the missile sheet under the explosive blast was established, and the simulation was conducted, the whole missile shell structure’s damage under different strength blast was studied, and the damage ability of the linear charge was analyzed.