Existence, nonexistence and decay estimate of global solutions for a viscoelastic wave equation with nonlinear boundary damping and internal source terms

Existence, nonexistence and decay estimate of global solutions for a viscoelastic wave equation with nonlinear boundary damping and internal source terms
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具有非线性边界阻尼和内部源项的粘弹性波动方程全局解的存在性、不存在性和衰减估计

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发表时间:
2017-07
影响因子:
0.7
通讯作者:
Shang Yadong
Shang Yadong
中科院分区:
--
文献类型:
--
作者:
Di Huafei;Shang Yadong

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本文考虑一类具有非线性边界阻尼和内源项的粘弹性波动方程的初边值问题。首先利用Galerkin逼近、势阱和单调紧性方法证明了整体弱解的存在性。然后,我们利用微扰能量方法给出了能量衰减率的显式估计。最后,在对松弛函数g和初值的一定假设下,研究了解的nite时间blow-up结果。
In this paper, we consider the initial boundary value problem for a viscoelastic wave equation with nonlinear boundary damping and internal source terms. We first prove the existence of global weak solutions by the combination of Galerkin approximation, potential well and monotonicity-compactness methods. Then, we give an explicit decay rate estimate of the energy by making use of the perturbed energy method. Finally, the nite time blow up result of the solutions is investigated under certain assumptions on the relaxation function g and initial data.
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