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arXiv 2103.04700math.NAcs.NA
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非线性wave equations的一个能量守恒线性隐格式的无条件最优收敛性

Unconditionally optimal convergence of an energy-conserving and linearly implicit scheme for nonlinear wave equations

Waixiang Cao, Dongfang Li, Zhimin Zhang

摘要:

本文提出并分析了求解非线性波动方程的一种能量守恒的线性隐格式。建立了时间上的最优误差估计和空间上的超收敛误差估计,而时间步长不依赖于空间网格步长。其关键是直接估计解界的$H^2$ -范数的非线性波动方程和相应的全离散计划,而以前的调查依赖于时空误差分裂的方法。数值算例证实了所提出的全离散格式的能量守恒性、无条件收敛性和最优误差估计。

英文摘要:

In this paper, we present and analyze an energy-conserving and linearly implicit scheme for solving the nonlinear wave equations. Optimal error estimates in time and superconvergent error estimates in space are established without time-step dependent on the spatial mesh size. The key is to estimate directly the solution bounds in the $H^2$-norm for both the nonlinear wave equation and the corresponding fully discrete scheme, while the previous investigations rely on the temporal-spatial error splitting approach. Numerical examples are presented to confirm energy-conserving properties, unconditional convergence, and optimal error estimates, respectively, of the proposed fully discrete schemes.

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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