内空和充水管道在爆炸冲击荷载下的数值模拟分析

The numerical simulation analysis of inner air pipes and water-filled pipes on the basis of explosive blast

利用ANSYS/LS-DYNA有限元软件,根据实验目的建立了计算模型,并选取适当的本构关系和材料,对空中TNT炸药爆炸冲击荷载下的内空和充水管道的动力响应规律进行了数值模拟分析,指出爆炸冲击荷载下,在等量炸药的条件下,充水管道的变形量、单元位移及单元压强峰值较内空管道低,这些参数的增加速率也均低于内空管道;充水管道的抗变形能力更强,稳定性更高。

Using the finite element software ANSYS/LS-DYNA, build the calculation model according to the purpose of the experiment, choose proper constitutive relation and materials, the numerical simulation analysis was applied to the dynamic response rules of water-filled pipes and in-ner air pipelines under the TNT explosion shock loading, point out under blast loading, with the same amount of TNT, these parameters, the de-formation of the water-filled pipe, the displacement of pipe5 s element and peak pressure, are lower than the inner air pipeline. And with the in- crease of explosion, the increase rate of these parameters is not higher than inner air pipeline. And it’ s destruction resistant ability is stronger, stable is higher.