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arXiv 2203.06360math.AP
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带空间依赖阻尼的波动方程解的渐近展开

Asymptotic expansion of solutions to the wave equation with space-dependent damping

Motohiro Sobajima, Yuta Wakasugi

AI总结:

该研究针对外区域中带空间依赖阻尼的波动方程,通过解分解思路与加权能量法证明了有效阻尼下解可按对应抛物方程解渐近展开,给出了余项估计方法。

摘要:

我们研究了外区域中带空间依赖阻尼的波动方程解的大时间行为。研究表明,若阻尼有效,解可按照对应抛物方程的解进行渐近展开。得到该渐近展开的核心思路是将阻尼波动方程的解分解为对应抛物问题的解,以及带特定非齐次项和初值的阻尼波动方程解的时间导数。余项估计则是借助对应抛物问题的合适上解,应用加权能量法得到的。

英文摘要:

We study the large time behavior of solutions to the wave equation with space-dependent damping in an exterior domain. We show that if the damping is effective, then the solution is asymptotically expanded in terms of solutions of corresponding parabolic equations. The main idea to obtain the asymptotic expansion is the decomposition of the solution of the damped wave equation into the solution of the corresponding parabolic problem and the time derivative of the solution of the damped wave equation with certain inhomogeneous term and initial data. The estimate of the remainder term is an application of weighted energy method with suitable supersolutions of the corresponding parabolic problem.

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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