In this paper, a crack is thought to be a physical model in which two semi-infinite uniform media were connected by spring s. The crack is of continuous stress and discontinuous strain. Based on propagation theory of plane wave, it is suggested that coherence in a crack could be indicated by the amplitude ratio or the coupling dynamic stiffness (CDS). The relation between CDS and the ratio has been deduced. The research is used to check the effect of grouting crevices in the Dunhuang Caves.
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刘旭,李最雄,王旭东.裂隙的弹性耦合模型及应用[J].地震工程学报,1996,18(4):49-53. Liu Xu, Li Zuixiong, Wang Xudong. ELASTIC COUPLING MODEL OF CRACK AND ITS APPLICATION[J]. China Earthquake Engineering Journal,1996,18(4):49-53.