Global existence and minimal decay regularity for the Timoshenko system: The case of non-equal wave speeds

Jiang Xu, Naofumi Mori, Shuichi Kawashima

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9 Citations (Scopus)

Abstract

As a continued work of [18], we are concerned with the Timoshenko system in the case of non-equal wave speeds, which admits the dissipative structure of regularity-loss. Firstly, with the modification of a priori estimates in [18], we construct global solutions to the Timoshenko system pertaining to data in the Besov space with the regularity s= 3/2. Owing to the weaker dissipative mechanism, extra higher regularity than that for the global-in-time existence is usually imposed to obtain the optimal decay rates of classical solutions, so it is almost impossible to obtain the optimal decay rates in the critical space. To overcome the outstanding difficulty, we develop a new frequency-localization time-decay inequality, which captures the information related to the integrability at the high-frequency part. Furthermore, by the energy approach in terms of high-frequency and low-frequency decomposition, we show the optimal decay rate for Timoshenko system in critical Besov spaces, which improves previous works greatly.

Original languageEnglish
Pages (from-to)5533-5553
Number of pages21
JournalJournal of Differential Equations
Volume259
Issue number11
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

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Keywords

  • Critical Besov spaces
  • Global existence
  • Minimal decay regularity
  • Timoshenko system

ASJC Scopus subject areas

  • Analysis

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