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含铝炸药震源激发地震波的数值模拟

DOI: 10.11858/gywlxb.2013.06.012, PP. 872-876

Keywords: 震源,Miller模型,地表垂向振动,下传地震波能量

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Abstract:

为了研究含铝炸药震源激发地震波能量的传播规律,对药量为0.7kg含铝炸药在埋深1m的砂土介质中进行爆炸实验,并基于AutoDyn商业软件引入高能炸药的Miller能量释放模型,对含铝炸药震源在土中的爆炸过程进行数值计算。模拟研究表明,地表垂向振动速度历程的模拟结果与实验结果吻合较好,说明JWL-Miller能量释放模型能较好地反映含铝炸药在土中的爆轰过程。模拟研究还表明,震源激发的下传地震波能量密度随深度的增加呈指数衰减规律,含铝炸药激发的下传地震波总能量为等药量TNT的1.34倍。

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