低波阻抗夹层拱形复合板抗爆性能分析

Anti-explosion Performance of Arched Composite Slab with Low Wave Impedance Interlayer

提出了用于结构抗爆的低波阻抗夹层拱形复合板,采用有限元分析软件ANSYS/LS-DYNA分析了板中厚度恒定条件下,起拱构造、低波阻抗层位置及厚度对其抗爆性能的影响,结果表明:①将低波阻抗层设置为夹层时,可大幅降低板中监测点的最大合成加速度、速度以及最大竖向拉应力;②当板起拱且低波阻抗夹层位置恒定时,过大的夹层厚度对结构抗爆性能反而不利;③若将厚度较小的低波阻抗夹层靠近板上表面布置,对结构抗爆有利。

An arched composite slab with low wave impedance interlayer for engineering anti-explosion was proposed.Via the finite element analysis software ANSYS/LS-DYNA,the effects of arch structure,location and thickness of the low wave impedance interlayer on the anti-explosion performance of the new slab style under constant thickness of slab are studied.The results show that:①When the low wave impedance layer is sandwiched,the maximum synthetic acceleration,velocity and maximum vertical tension stress of the monitoring point are greatly reduced.②When the plate arches and the location of the low impedance interlayer is constant,the excessive thickness of the interlayer is not conducive to the explosion resistance of the structure.③If the low wave impedance interlayer with smaller thickness is set near the upper surface of the slab,it's beneficial to the anti-explosion performance of the structure.