A hybrid method to simulate elastic wave scattering of three-dimensional objects
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Published on: June 2, 2010
Zhen Li1, Yuanda Su1, Xiaoming Tang1
1School of Geosciences, China University of Petroleum (East China), Qingdao, China lizhen9099@hotmail.com, syuanda@sina.com, tangxiam@aliyun.com, kestrel2012@live.com.
Abstract:
A hybrid method based on the finite-difference method and equivalence principle to simulate elastic wave scattering of three-dimensional objects is proposed. In this method, the near fields are first calculated in a rectangular volume containing the object by the finite-difference method. Then the displacements and tractions on a virtual surface are transformed to the far field by the application of the equivalence principle in elastodynamics. The feasibility is verified by comparing modeling results with the analytical solution for the canonical point force source radiation problem. Modeling for complex scatterer structures shows the advantage of this method in handling multi-scale scattering problems.
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