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arXiv 2601.01752math.AP
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具有变量指数对数非线性和弱阻尼的粘弹性波方程的能量衰减

Energy decay of a viscoelastic wave equation with variable exponent logarithmic nonlinearity and weak damping

School of Mathematics and Statistics & Hubei Key Laboratory of Engineering Modeling and Scientific Computing, Huazhong University of Science and Technology(华中科技大学数学与统计学院及工程建模与科学计算湖北省重点实验室);Department of Mathematics, Kyoto University(京都大学数学系)

Qingqing Peng, Yikan Liu

AI总结:

本文研究了具有变量指数对数非线性和弱阻尼的粘弹性波方程的能量衰减问题,推导出一般衰减估计并改进了现有结果,获得了指数和多项式衰减率。

摘要:

本文研究了在有界域中具有变量指数对数非线性和弱阻尼的粘弹性波方程解的能量衰减问题。我们建立了在放松函数$g$满足较弱条件下的显式一般衰减结果。进一步,在一般假设$g'(t)\leq-ζ(t)G(g(t))$下,我们推导出一个改进现有结果的精细衰减估计。特别地,在进一步特殊情况下$g'(t)\leq-ξ(t)g^q(t)$ with $1\leq q<2$,我们获得了均匀指数和多项式衰减率,扩展了先前研究中仅限于$1\leq q<\frac{3}{2}$的情况。

英文摘要:

In this paper, we investigate the energy decay of the solution to a viscoelastic wave equation with variable exponents logarithmic nonlinearity and weak damping in a bounded domain. We establish an explicit general decay result under mild conditions on the relaxation function $g$. Furthermore, under the general assumption $g'(t)\leq-ζ(t)G(g(t))$ with some suitably given $ζ$ and $G$, we derive a refined decay estimate improving existing results. In particular, uniform exponential and polynomial decay rates are obtained under a further special situation $g'(t)\leq-ξ(t)g^q(t)$ with $1\leq q<2$, extending earlier studies that were restricted to the case $1\leq q<\frac{3}{2}$.

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