Logarithmic decay rate for a structural-acoustic interaction model with supercritical source and nonlinear damping

Haiyan Li , Victor R. Cabanillas , Donal O’Regan

Electronic Research Archive ›› 2026, Vol. 34 ›› Issue (5) : 3573 -3592.

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Electronic Research Archive ›› 2026, Vol. 34 ›› Issue (5) :3573 -3592. DOI: 10.3934/era.2026160
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Logarithmic decay rate for a structural-acoustic interaction model with supercritical source and nonlinear damping
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Abstract

In this paper, we study a structural acoustics model with supercritical source and nonlinear damping. The model consists of a wave equation defined on a bounded domain which is strongly coupled with a Berger plate equation acting on the elastic wall. The aim of the paper is to remove the strong condition $u \in L^{\infty}\left(\mathbb{R}^{+} ; L^{\frac{3}{2}}(\Omega)\right) \text { for } m_{1}>5$ in the work [1] to obtain a weaker energy decay, and give a logarithmic decay rate under a weak assumption on the initial data.

Keywords

structural acoustics model / energy decay / supercritical sources / nonlinear damping

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Haiyan Li, Victor R. Cabanillas, Donal O’Regan. Logarithmic decay rate for a structural-acoustic interaction model with supercritical source and nonlinear damping. Electronic Research Archive, 2026, 34 (5) : 3573-3592 DOI:10.3934/era.2026160

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