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- W2974138051 abstract "We consider a coupled wave system with partial Kelvin-Voigt damping in the interval (-1,1), where one wave is dissipative and the other does not. When the damping is effective in the whole domain (-1,1) it was proven in H.Portillo Oquendo and P.Sanez Pacheco, optimal decay for coupled waves with Kelvin-voigt damping, Applied Mathematics Letters 67 (2017), 16-20. That the energy is decreasing over the time with a rate equal to $t^{-frac{1}{2}}$. In this paper, using the frequency domain method we show the effect of the coupling and the non smoothness of the damping coefficient on the energy decay. Actually, as expected we show the lack of exponential stability, that the semigroup loses speed and it decays polynomially with a slower rate then given in, H.Portillo Oquendo and P.Sanez Pacheco, optimal decay for coupled waves with Kelvin-voigt damping, Applied Mathematics Letters 67 (2017), 16-20, down to zero at least as $t^{-frac{1}{12}}$." @default.
- W2974138051 created "2019-09-26" @default.
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- W2974138051 date "2019-09-21" @default.
- W2974138051 modified "2023-09-27" @default.
- W2974138051 title "Stability for coupled waves with locally disturbed Kelvin-Voigt damping." @default.
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