不耦合装药混凝土中应力波传播的数值分析

Numerical Analysis of Stress Wave in Concrete under the Conditions of Decoupling Charge

运用有限元软件对不耦合装药条件下混凝土中应力波传播进行数值分析,分析了应力波随时间的衰减曲线和速度时间曲线,得出应力波通过水介质传到混凝土中压力均匀、强度衰减较缓慢、传播距离较远,以及炮眼周围混凝土的破坏形态。解释了混凝土自由面在拉应力波作用下的层裂现象。模拟结果对爆破理论和物探方面具有一定的参考价值。

Numerical analysis of stress wave in concrete under the conditions of decoupling charge was performed with finite dement software. The attenuation curve of stress wave and velocity curve along with time were analyzed. The result showed that the stress wave passed through water to concrete, with uniform pressure, low descending speed and long distance. The crush form of concrete around the shot hole was also induced. The phenomenon of spallation in the free surface of the concrete under tensile stress wave was explained. The simulation result has some reference value to the geophysical and blasting theory.