冲击载荷作用下金属防护外壳的防爆仿真分析

为了降低和防止爆炸冲击波对目标的破坏,提高防爆抗冲击能力,使用多孔材料或轻质材料设计多层复合结构,已经成为当前国内外防爆安全研究的热点.有限元分析是模拟爆炸实验的重要手段.鉴于目前飞机黑匣子不能满足在爆炸冲击的极限工作环境下正常工作的要求,采用通用有限元软件ABAQUS作为结构非线性动力学仿真分析的工具,调用显式分析模块ABAQUS/Explicit进行了数值汁算,提出并论证了采用中间柔性材料缓冲层的复合防护结构,能够延缓爆炸载荷对黑匣子核心单元的冲击作用,保护黑匣子内部模块不受严重破坏,为飞机黑匣子保护外壳的设计提供了重要指导.

Blast-resistant Simulation Analysis of Protective Metal Crust under Impact Load

In order to reduce the distortion of the structure under impact load,and improve the anti-blasting ability,it has currently become the focus in explosion security field to design multilayer composite structure using multihole material or light material.The Finite Element Analysis(FEA) is the main method for blast experiment.Up to now,the black box can not bear the limit condition of explosive impact.The paper puts forward a composite structure with flexible material layer.ABAQUS,a general-purpose FEA progra...