【摘要】 通常将地下封闭式爆炸近似为球对称爆炸震源来研究,然而利用这一模型来解释由地下核爆炸激发的近场和远场地震波的全部特征是远远不够的,通过理论和利用地下核爆炸产生的地震波数据的研究,学者们总结出了一些重要的辅助震源模式,作为地下核爆炸的二次源机制,如地震波转换震源模式、层裂震源模式、构造应变能释放震源模式等.其中的一些模型成功地解释了诸如地下核爆炸Lg波的激发机制等重要问题.本文介绍了这些重要模式的研究背景及理论依据,并且详细地推导了层裂源的数学描述过程.更多还原

【Abstract】 The source of underground nuclear explosions is usually regarded as a symmetric sphere source.However this model can not fully explain the characteristics of the seismic waves generated by the underground nuclear explosions.Through studying of theories and seismic waves generated by the underground explosions,some scholars have summarized some important assistance earthquake source mechanism models to explain the non-symmetry source,such as the wave-conversion source model,the spall model and the release of tectonic strain model.These models successfully explain some important questions,such as the mechanism of the generation of the Lg waves by underground nuclear explosions.This study presents the background and the theoretical basis of these models in detail.更多还原