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首页> 外文期刊>Journal of Computational Methods in Physics >Finite-Difference Simulation of Elastic Wave with Separation in Pure P- and S-Modes
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Finite-Difference Simulation of Elastic Wave with Separation in Pure P- and S-Modes

机译:纯P和S模式下分离弹性波的有限差分模拟

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Elastic wave equation simulation offers a way to study the wave propagation when creating seismic data. We implement an equivalent dual elastic wave separation equation to simulate the velocity, pressure, divergence, and curl fields in pure P- and S-modes, and apply it in full elastic wave numerical simulation. We give the complete derivations of explicit high-order staggered-grid finite-difference operators, stability condition, dispersion relation, and perfectly matched layer (PML) absorbing boundary condition, and present the resulting discretized formulas for the proposed elastic wave equation. The final numerical results of pure P- and S-modes are completely separated. Storage and computing time requirements are strongly reduced compared to the previous works. Numerical testing is used further to demonstrate the performance of the presented method.
机译:弹性波方程模拟提供了一种在创建地震数据时研究波传播的方法。我们实现了一个等效的双弹性波分离方程,以模拟纯P模式和S模式下的速度,压力,发散和卷曲场,并将其应用于全弹性波数值模拟。我们给出了明确的高阶交错网格有限差分算子,稳定性条件,色散关系以及吸收边界条件的完美匹配层(PML)的完整推导,并给出了所提出的弹性波方程的离散化公式。纯P模式和S模式的最终数值结果完全分开。与以前的工作相比,大大减少了存储和计算时间要求。数值测试进一步证明了所提出方法的性能。

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