arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2504.02400math.AP
收藏

具有振荡尺度不变阻尼的波动方程的模型示例

The model example of wave equation with oscillating scale-invariant damping

Marina Ghisi, Massimo Gobbino

AI总结:

本文研究了具有振荡尺度不变阻尼的波动方程,发现阻尼系数的振荡会与弹性项产生共振效应,导致部分解的能量衰减率变慢,并通过 Fourier 分析和极坐标变换将问题转化为常微分方程渐近行为与振荡积分的研究。

摘要:

我们分析了一个具有时间依赖阻尼项的波动方程的简单示例,其系数在无穷远处以尺度不变速率衰减,并包含一个可积但非绝对可积的振荡分量。我们证明,阻尼系数中的振荡会与弹性项的基本解产生共振效应,从而改变解的能量衰减率。特别地,与无振荡分量的情况相比,某些解表现出更慢的衰减。我们的证明依赖于 Fourier 分析和极坐标下解的表示,将问题转化为对一族常微分方程解的渐近行为及适当振荡积分的详细研究。

英文摘要:

We analyze a simple example of wave equation with a time-dependent damping term, whose coefficient decays at infinity at the scale-invariant rate and includes an oscillatory component that is integrable but not absolutely integrable. We show that the oscillations in the damping coefficient induce a resonance effect with a fundamental solution of the elastic term, altering the energy decay rate of solutions. In particular, some solutions exhibit slower decay compared to the case without the oscillatory component. Our proof relies on Fourier analysis and a representation of solutions in polar coordinates, reducing the problem to a detailed study of the asymptotic behavior of solutions to a family of ordinary differential equations and suitable oscillatory integrals.

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。

↑