Global existence and stability for semilinear wave equations damped by time-dependent boundary frictions

Global existence and stability for semilinear wave equations damped by time-dependent boundary frictions
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随时间变化的边界摩擦阻尼半线性波动方程的全局存在性和稳定性

DOI:
10.1016/j.amc.2019.02.032
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发表时间:
2019-08
影响因子:
4
通讯作者:
Xu Yong
Xu Yong
中科院分区:
数学2区
文献类型:
--
作者:
Jiao Zhe;Xu Yong

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考虑具有随时间变化的边界阻尼的半线性波动方程。我们证明了解的全局存在性,并建立了非自治系统能量的统一衰减率。从结果可以看出,阻尼项的增长条件决定了能量衰减的形式,是多项式衰减还是指数衰减,而阻尼系数的大小影响能量衰减的速度。据我们所知,关于具有与时间相关的边界耗散的多维波动方程的适定性和衰减率的工作很少。
Semilinear wave equations with time-dependent boundary dampings are considered. We prove global existence of the solution, and establish uniform decay rates of the energy of the non-autonomous system. From the results, one can see that the growth conditions of the damping term determine the form of the energy decay, polynomial or exponential decay, and the coefficient of the damping influences the speed of the energy decay. To the best of our knowledge, there has been few work about the well-posedness and decay rates of a multi-dimensional wave equation with a time-dependent boundary dissipation.
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