海啸模拟中产生海底变形的高分辨率有限体积地震模式
A High-Resolution Finite Volume Seismic Model to Generate Seafloor Deformation for Tsunami Modeling
摘要：
本文提出了一种高分辨率有限体积法，用于在模拟一般断层几何形状时考虑矩形子断层的随时间变化的滑移。断层滑移是由修改的黎曼问题的线弹性方程跨单元界面对齐的子断层。这在开源Clawpack软件（www.clawpack.org）中实现的高分辨率波传播算法的上下文中进行了说明，但这种方法可以很容易地结合到其他基于黎曼解算器的数值方法中。表面变形的结果在两个和三个维度，并给出了稳定状态下，均匀的半空间冈田解。
英文摘要：
A high-resolution finite volume method approach to incorporating time-dependent slip across rectangular subfaults when modeling general fault geometry is presented. The fault slip is induced by a modification of the Riemann problem to the linear elasticity equations across cell interfaces aligned with the subfaults. This is illustrated in the context of the high-resolution wave-propagation algorithms that are implemented in the open source Clawpack software (www.clawpack.org), but this approach could be easily incorporated into other Riemann solver based numerical methods. Surface deformation results are obtained in both two and three dimensions and compared to those given by the steady-state, homogeneous half-space Okada solution.
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