Scattering of a semi-cylindrical canyon and a crack with incident SH waves
LIU Gang,LI Hong-liang,LIU Dian-kui(Department of Civil Engineering,Harbin Engineering University, Harbin 150001,Heilongjiang,China)
The scattering of a semi-cylindrical canyon and a crack with incident SH waves was studied based on Green's function.A special Green's function which was a fundamental solution of displacement field for a half-elastic space with a semi-cylindrical canyon bearing an anti-plane harmonic line-source force at any point was proposed for the present problem.And the scattering problem of SH-wave by a half-elastic space with semi-cylindrical canyon was solved.Then,at the actual position of cracks,the existent cracks could be reverted by using Green's function and the method of crack-division.Integration for the obtained solution of the whole problem was established,and the solution of the ground surface's displacement amplitude was concluded.
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