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Energy behavior for Sobolev solutions to viscoelastic damped wave models with time‐dependent oscillating coefficient

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  • Xiaojun Lu

Abstract

In this work, we study the asymptotic behavior of the structurally damped wave equations arising from the viscoelastic mechanics. We are particularly interested in the complicated interaction of the time‐dependent oscillating coefficients on the Dirichlet Laplacian operator and the structurally damped terms. On the one hand, by the application of WKB analysis, we explore the asymptotic energy estimates of the wave equations influenced by four types of oscillating mechanisms. On the other hand, in order to prove the optimality of the energy estimates for the critical cases, typical coefficients and initial Cauchy data will be constructed to show the lower bound of the energy growth rate by the application of instability arguments.

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  • Xiaojun Lu, 2024. "Energy behavior for Sobolev solutions to viscoelastic damped wave models with time‐dependent oscillating coefficient," Mathematische Nachrichten, Wiley Blackwell, vol. 297(7), pages 2445-2467, July.
    • Handle: RePEc:bla:mathna:v:297:y:2024:i:7:p:2445-2467
    DOI: 10.1002/mana.202200431
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