arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1901.01792math.NAcs.NA
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动态边界条件下wave equations有限元误差分析:$L^2$估计

Finite element error analysis of wave equations with dynamic boundary conditions: $L^2$ estimates

David Hipp, Balázs Kovács

摘要:

本文研究了波动方程动力边界条件的半离散和全离散的$L^2$模误差估计,给出了用体-面有限元和龙格-库塔法离散的结果.分析驻留在一个抽象的配方和误差估计,通过能源技术,在这个抽象的设置。分析了四个符合抽象框架的具有动态边界条件的原型线性波动方程。对于速度项的问题,或与声学边界条件,我们证明了令人惊讶的结果:对于这样的问题的空间收敛阶被证明是小于2。这些也可以在所提出的数值实验中观察到。

英文摘要:

$L^2$ norm error estimates of semi- and full discretisations, using bulk--surface finite elements and Runge--Kutta methods, of wave equations with dynamic boundary conditions are studied. The analysis resides on an abstract formulation and error estimates, via energy techniques, within this abstract setting. Four prototypical linear wave equations with dynamic boundary conditions are analysed which fit into the abstract framework. For problems with velocity terms, or with acoustic boundary conditions we prove surprising results: for such problems the spatial convergence order is shown to be less than two. These can also be observed in the presented numerical experiments.

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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