爆破地震波对地下结构物的影响仿真研究

Effect of Blasting Stress Waves on Underground Structure

目的 获取爆破地震波作用下地下结构物的响应特征 .方法 本文以试验结果为依托 ,采用非线性有限元分析手段 ,对爆破地震波对地下结构物的影响进行了数值模拟 .结果 数值模拟结果与试验吻合较好 .结论 得出两个主要结果 :介质质点振动速度的传播规律 (有效峰值持续时间 ,随传播距离的增大呈增大趋势 ) ;结构响应特征 (铅直振动是爆破地震波作用下结构振动的主要成分 )

Aim: To obtain response rule of the underground structure under blasting stress waves. Methods: Based on experimental results, by mean of non-linear FEM, computer simulation of the underground structure under blasting stress waves is made. Results: Simulation result is will correspond to experimental result. Conclusion: There are two main aspects: (1) Propagation rule of media nodes: the effective velocity value duration is increased as the distance increases between the node and the blasting source. (2) Response rule of structure: Vibrating velocity in the vertical direction is the main portion for the underground-structure nodes.