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非线性波动方程的解的存在性和衰减性
引用本文:韩英豪,张俊丽,齐宝新.非线性波动方程的解的存在性和衰减性[J].辽宁师范大学学报(自然科学版),2009,32(4):396-400.
作者姓名:韩英豪  张俊丽  齐宝新
作者单位:辽宁师范大学,数学学院,辽宁,大连,116029
摘    要:设Ω是n中的有界开集,对Ω上一致有界的函数a(x)≥0和一个常数ρ≥0,考虑了非线性粘性波动方程|ut|ρutt-u+∫0^tμ(t-s)u(s)ds+a(x)|ut|ρut+g(u)=0.首先,利用Faedo-Galerkin逼近方法证明了整体弱解的存在性; 其次,通过函数F(t)=E(t)+ε1φ(t)+ε2χ(t)的估计,得到了能量的指数衰减性.

关 键 词:粘性波动方程  解的存在性  指数衰减性

Existence and exponential decay of solutions to a non-linear viscoelastic wave equation
HAN Ying-hao,ZHANG Jun-li,QI Bao-xin.Existence and exponential decay of solutions to a non-linear viscoelastic wave equation[J].Journal of Liaoning Normal University(Natural Science Edition),2009,32(4):396-400.
Authors:HAN Ying-hao  ZHANG Jun-li  QI Bao-xin
Institution:HAN Ying-hao,ZHANG Jun-li,QI Bao-xin(School of Mathematics,Liaoning Normal University,Dalian 116029,China)
Abstract:Let Ω be a bounded open domain in Mn.For a uniformly bounded function a(x)≥0 on Ω,and a constant ρ≥0,we consider the nonlinear viscoelastic equation |ut|ρutt-△u+∫^t0μ(t-s)△u(s)ds+a(x)|ut|ρut+g(u)=0.Firstly,based on Faedo-Galerkin approximation method,the existence of global weak solutions is proved.Secondly,according to the estimation of F(t)=E(t)+ε1φ(t)+ε2χ(t),an exponential decay result is established.
Keywords:viscoelastic wave equation  existence of solutions  exponential decay  
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