| This paper applies the complex variable function method and the green’s functionmethod.The author discusses the problems that the scattering of an out-plane line source loadin the model which has a half space interface canyon and a circular cavity contained below it,as well as in the whole space, when the SH-wave injects from the lower half of the medium,theproblems that the scattering of the SH-wave in the model which has a circular cavity at theinterface and contains a circular hole under the interface.The author mainly discusses the problems of scattering in the half space when theout-plane line source load injects. And through the analysis of the change of the materialconstant and geometrical parameters, the author gets the dynamic stress concentration factor’strend of change around the half-circular cavity at the interface sag and the circular hole in themedium.Several typical examples are showed in this part to analyze the influence of the changeof the incident wave number and the buried depth of the circular hole to the dynamic stressconcentration factor of this structure.We study the influence of the whole space model when the SH-wave injects.We partitionthe whole space to two part，construct the green’s function of each part.Then on the basis of theboundary conditions，fit them together,create the equations to solve this problem.Select sometypical material constant and geometry parameters, got the corresponding dynamic stressconcentration factor through examples,and considering the influence of various parameters tothe results,analysis and discuss the results at the same time. |
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