爆炸波影响地下结构的数值模拟方法

Numerical Analysis Method of Explosion Wave Effeetion on Underground Structure

采用动力有限元,利用特有的爆炸单元直接计算炸药在岩土介质中爆炸、爆炸波传播及遇到地下洞室对其产生影响的全过程,并针对某现场大型地下洞室抗爆试验,利用数值模拟,分析计算与现场爆炸、地质、洞室支护等条件相同情况下地下结构的动力响应,模拟计算结论与现场试验结果分布规律相同、数值接近,表明有限元法直接模拟爆炸对地下结构的影响具有一定的可靠性,为进一步研究地下结构在爆炸荷载下的动力响应及安全评价打下基础。

Using Dynamic finite element program, explosive elements are directly applied in rock elements to present the explosion in rocks and blast wave spread to underground structure. Results from numerical calculations of an explosion experi- ments showed the measurement relevant results. The method using Dynamic element program to simulate explosion loads effec- ring on underground structure is workable, this method can be adopt further to study the underground structure upon dynamic character and safety on explosion loads.