内置铝基复合泡沫材料抗爆门动力响应模拟研究

Numerical Simulation on Dynamic Response of Blast-resistance Door with Built-in Aluminum Matrix Syntactic Foam

借助多孔金属材料良好的吸能特性,设计一种新型内置复合泡沫铝抗爆门防护结构。为考察其动力响应,基于LS-DYNA有限元程序,对比了钢制抗爆门和内置复合泡沫铝芯层两类抗爆门在相同炸药TNT当量爆炸荷载作用下,结构正面有效应力、背面中心位移—时程及结构能量分布等动力响应特性,数值模拟表明:内置复合泡沫铝抗爆门主要通过芯层复合泡沫铝吸收冲击波压缩作用产生的能量,与钢制抗爆门相比,其应力场分布更为均匀,迎爆面峰值应力降低了35%,结构背面板最大变形减小了50%,有效提高了结构在爆炸冲击波作用下的承载能力和变形能力。

A novel anti-blast door protective structure with built-in aluminum matrix syntactic foam is designed,which takes advantage of the good energy absorption property of the porous metal material. In order to investigate the dynamic response properties of two type of steel anti-blast door and anti-blast door with built-in aluminum matrix syntactic foam,they are compared under the explosion load of the same TNT equivalent in terms of the effective stress at the central point of the front face,the displacement-time history of the center point of the back face and the energy distribution of the structure using the FE software LS-DYNA. Simulation shows that the anti-blast door with built-in aluminum matrix syntactic foam absorbs the energy generated by the compression effect of the shock wave through the core layer of composite aluminum foam. For the anti-blast door with aluminum matrix syntactic foam,the stress field distributes more uniformly,the peak stress of the front face is reduced by 35%,the maximum displacement of the back face is decreased by 50%,which effectively improves the load bearing capacity and the deformability of the structure subjected to the explosion shock waves.