【摘要】 采用实验与数值模拟相结合的方法研究了双层钢管结构在内爆炸载荷作用下的动力响应。考察了内外层钢管的壁厚设置与炸药质量对结构变形失效模式及其抗爆性能的影响。结果表明:与外管壁厚相比,内管壁厚对结构变形失效模式起主导作用,随着炸药质量的增加,内管壁厚对结构变形的影响逐渐减弱;并且内管壁厚的改变显著影响结构的能量分配机制,增加炸药质量时,外管能量耗散增幅大于内管。更多还原

【Abstract】 The dynamic responses of double-layer steel pipes to internal blast loading were investigated using the method of tests combined with numerical simulation. Both effects of wall-thickness-arrangements of double-layer steel pipes and mass change of TNT charges on the failure mode of structural deformation and the pipers ’ anti-blast performances were analyzed. The results indicated that compared to the change of outer pipe thickness,inner pipe thickness change this effect reduces with increase in charge mass; meanwhile,inner pipe thickness change affects obviously the structural energy distribution,energy dissipation in outer pipe increases faster than that in inner pipe does with increase in charge mass.更多还原