Acta mathematica scientia,Series A ›› 2023, Vol. 43 ›› Issue (6): 1681-1698.

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Indirect Stabilization and Optimal Decay Rates of Weakly Coupled Plates with Various Types of Damping

Han Zhongjie1,He Yiheng1,Zhao Zhixue2,*()   

  1. 1School of Mathematics, Tianjin University, Tianjin 300354
    2School of Mathematical Science, Tianjin Normal University, Tianjin 300387
  • Received:2021-12-23 Revised:2023-04-10 Online:2023-12-26 Published:2023-11-16
  • Supported by:
    NSFC(62073236);NSFC(11901433)

Abstract:

This work is concerned with the stabilization and optimal decay rates of a weakly coupled (coupling through displacements) elastic plate system, where the damping (viscous damping, structural damping or Kelvin-Voigt damping) is actuated at only one of the two plates. The optimal polynomial decay rate is derived based on the frequency domain approach and detailed spectral analysis of the system operator. Moreover, the relationship between the optimal decay rates of the system and the order of damping is identified. Besides, an interesting phenomenon is found that the higher the order of indirect damping is actuated, the slower polynomial decay rate of the weakly coupled plate system achieves. Finally, some numerical simulations are presented to verify the theoretical results.

Key words: Coupled elastic plate, Indirect stabilization, Optimal polynomial decay, Spectral analysis, Frequency domain analysis

CLC Number: 

  • O231.4
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