【摘要】 地震波场模拟中的有限差分法和有限元法是使用广泛也较为成功的方法,但是它们还是或多或少地存在一些缺陷,如为了提高计算精度而使运算效率降低、在泊松比变化大的界面存在稳定性问题等。伪谱法是一种模拟精度和计算效率都比较高的地震波场数值模拟方法,首先给出TI介质中的波动方程,然后推导了TI介质的伪谱法计算公式,最后对一些介质模型进行了模拟试算。验证了方法的有效性和TI介质本身的一些特性。更多还原

【Abstract】 In seismic wave field simulation,finite difference method and finite element method are both widely used and successful methods.However,there are some defects more or less in those two methods,such as,the problems in decreasing the operation efficiency to improve calculation accuracy,and also stability problems in boundary of great variation in Poisson ratio.Pseudo-spectral method is a numerical simulation method for seismic wave field.It is with high simulation accuracy,and high calculation efficiency.The wave equation in TI medium is given first,then pseudo-spectral method formulae of TI medium is derived,and finally simulated test computation has done on some medium models.Pseudo-spectral method validates the effectiveness of the method and the specialty of TI medium itself.更多还原