arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1701.01013math.AP
收藏

具有粘弹性边界阻尼的wave equation的衰减率

On the decay rate for the wave equation with viscoelastic boundary damping

Reinhard Stahn

摘要:

本文考虑具有记忆型边界条件的波动方程。在边界的声阻抗$\hat{k}$上的自然条件下,可以定义相应的收缩半群(Desch,Fasangova,Milota,Probst 2010)。借助于Tauberian定理,我们通过半群生成元$-\mathcal{A}$的预解式估计建立了能量衰减率。我们把估计$-\mathcal{A}$的预解式的问题归结为估计相应平稳问题的预解式的问题。在对$\hat{k}$不太严格的附加假设下,我们建立了预解式的上界.对于区间或圆盘上的波动方程,我们证明了我们的估计是精确的。

英文摘要:

We consider the wave equation with a boundary condition of memory type. Under natural conditions on the acoustic impedance $\hat{k}$ of the boundary one can define a corresponding semigroup of contractions (Desch, Fasangova, Milota, Probst 2010). With the help of Tauberian theorems we establish energy decay rates via resolvent estimates on the generator $-\mathcal{A}$ of the semigroup. We reduce the problem of estimating the resolvent of $-\mathcal{A}$ to the problem of estimating the resolvent of the corresponding stationary problem. Under not too strict additional assumptions on $\hat{k}$ we establish an upper bound on the resolvent. For the wave equation on the interval or the disk we prove our estimates to be sharp.

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。

↑