摘要
利用非线性动力有限元分析软件LS-DYNA,模拟了55.9 kg球形TNT药包在花岗岩和白云岩中爆炸时的破坏情况。仿真结果表明:强度对于自由面附近岩石破坏特征有明显影响,强度较大的花岗岩自由面附近反射拉伸波容易引起脆性断裂;强度较小的白云岩对应力波衰减较快,自由面附近不易发生破坏。数值模拟再现了爆炸应力波传播和岩石破坏过程,对爆破工程有一定的借鉴意义。
By using the LS-DYNA nonlinear dynamic finite element software, the destructive effect of a TNT mass weighed 55.9 kg on granite and dolomite were simulated respectively. It＇s suggested that, the impact of rock strength to damage character is very notable. The no-restralned surface of granite can be damaged most easily ,duo to tensile stress ;dolomite, whose strength is smaller, was hard to damage. The simulation results showed the process of damage and provided the reference for blasting engineering.
出处
《爆破》
CSCD
2008年第4期11-13,19,共4页
Blasting
关键词
数值模拟
动载
破坏特征
numerical simulation
dynamic charge
damage character
