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arXiv 1904.04048math.NAcs.NA
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二维Wave Equation的Poisson公式生成的显式Stenkenstein计算格式

Explicit Stencil Computation Schemes Generated by Poisson's Formula for the 2D Wave Equation

Naum M. Khutoryansky

摘要:

提出了一种新的建立二维瞬态声波方程显式时间推进模板计算格式的方法。它是基于使用泊松公式及其三个时间级的修改结合多项式模板插值的解决方案,在每个时间步和精确积分。时间步进算法由两个显式模板计算程序:第一个时间步程序,将初始条件和两步计划的第二个和下一个时间步。三个特定的显式模板计划(5,9和13个空间点)使用这种方法构建。给出了它们的稳定区域。与传统的有限差分格式相比,新方案的精度优势,通过使用精确的基准解决方案的模拟证明。

英文摘要:

A new approach to building explicit time-marching stencil computation schemes for the transient 2D acoustic wave equation is implemented. It is based on using Poisson's formula and its three time level modification combined with polynomial stencil interpolation of the solution at each time-step and exact integration. The time-stepping algorithm consists of two explicit stencil computation procedures: a first time-step procedure incorporating the initial conditions and a two-step scheme for the second and next time-steps. Three particular explicit stencil schemes (with five, nine and 13 space points) are constructed using this approach. Their stability regions are presented. Accuracy advantages of the new schemes in comparison with conventional finite-difference schemes are demonstrated by simulation using an exact benchmark solution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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