Local uniform stability for the semilinear wave equation in inhomogeneous media with locally distributed Kelvin-Voigt damping

摘要

We consider the semilinear wave equation posed in an inhomogeneous medium Omega with smooth boundary partial derivative Omega subject to a local viscoelastic damping distributed around a neighborhood omega of the boundary according to the Geometric Control Condition. We show that the energy of the wave equation goes uniformly and exponentially to zero for all initial data of finite energy taken in bounded sets of finite energy phase-space. As far as we know, this is the first stabilization result for a semilinear wave equation with localized Kelvin-Voigt damping.