A NEARLY-ANALYTICAL DISCRETIZATION MODELLING TECHNIQUE OF 3-COMPONENT SEISMIC WAVE-FIELDS
YANG DING-HUI; TENG GI-WEN; ZHANG ZHONG-JIE(Institute of Geophysics, Chinese Academy of Sciences, Beijing 100101, China)
The second-order elastic wave equations In 2-D inhomogeneously anisotropic media are changed into a system of first-order partial differential equations for time t. A new nearlyanalytic discretization method(NADM),which is different from these conventional methods──finite element method, reflectivity method, ray tracing method, and finite difference method(FDM), etc., is developed via using the Taylor expansion and interpolating approximation method. The 3-component seismic wave-fields in two layered isotropic and transversely isotropic media(TIM) are simulated by the algorithm designed in this psper.The numerical results, computed by the NADM method and the coventional finite-difference method, are compared. It shows that the new method is feasible and satisfactory.
【CateGory Index】： P315