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arXiv 2109.01455math.APmath.OC
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任意维定体积固支板基频最小化最优域的存在性

Existence of an optimal domain for minimizing the fundamental tone of a clamped plate of prescribed volume in arbitrary dimension

Kathrin Stollenwerk

摘要:

在19世纪,瑞利勋爵(Lord Rayleigh)指出,在所有给定面积的固定板中,圆盘最小化了基音。20世纪90年代,N. S. Nadirashvili在$\mathbb{R}^2$和M. S.阿什博河D. Benguria在$\mathbb{R}^2$和$\mathbb{R}^3$中给出了证明。本文证明了在给定测度下,在$\mathbb{R}^n$的所有开有界子集中,最小化基音的最优域$n\geq 4$的存在性.我们将固支板的基频最小化问题表示为一个带有惩罚项的体积约束的自由边界值问题。当惩罚参数变小时,我们证明了最优形状问题得到了解决。

英文摘要:

In the 19th century, Lord Rayleigh conjectured that among all clamped plates with given area, the disk minimizes the fundamental tone. In the 1990s, N. S. Nadirashvili proved the conjecture in $\mathbb{R}^2$ and M. S. Ashbaugh und R. D. Benguria gave a proof in $\mathbb{R}^2$ and $\mathbb{R}^3$. In the present paper, we prove existence of an optimal domain for minimizing the fundamental tone among all open and bounded subsets of $\mathbb{R}^n$, $n\geq 4$, with given measure. We formulate the minimization of the fundamental tone of a clamped plate as a free boundary value problem with a penalization term for the volume constraint. As the penalization parameter becomes small we show that the optimal shape problem is solved.

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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