硬岩中地下爆炸震源函数的数值模拟

Numerical modeling of seismic source function for underground explosion in hard rock

摘要: 利用一维球对称有限差分数值计算源程序模拟了硬岩中地下强爆炸的震源函数，给出了弹性半径处的位移、径向压力波形，得到了地下爆炸的折合位移势及其源频谱。相关计算结果与已有文献给出的结果一致。同时，对介质剪切强度与地下爆炸震源强度之间的关系进行了数值分析。研究结果可为硬岩中地下强爆炸地震耦合效应的计算提供参考。
- 爆炸力学 /
- 震源函数 /
- 有限差分数值计算源程序 /
- 地下爆炸 /
- 折合位移势
Abstract: The explosion seismic source function in hard rock was numerically simulated with a one-dimensional spherical symmetric finite difference code. The following factors were calculated as the displacement and radial pressure at the elastic radius, the reduced displacement potential and source spectrum. These calculated results are in agreement with the existent results. And the relationship between seismic coupling strength and material shear strength was discussed. It is found that the seismic source strength of underground explosion decreases with the increase of material shear strength.
- mechanics of explosion /
- seismic source function /
- finite difference code /
- underground explosion /
- reduced displacement potential

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