Vibration and damping analysis of annular plates with constrained damping layer treatments

Horng Jou Wang, Lien-Wen Chen

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

The natural frequencies and modal loss factors of annular plates with fully and partially constrained damping treatments are considered. The equations of free vibration of the plate including the transverse shear effects are derived by a discrete layer annular finite element method. The extensional and shear moduli of the viscoelastic material layer are described by the complex quantities. Complex eigenvalues are then found numerically, and from these, both frequencies and loss factors are extracted. The effects of viscoelastic layer stiffness and thickness, constraining layer stiffness and thickness, and treatment size on natural frequencies and modal loss factors are presented. Numerical results also show that the longer constrained damping treatment in radial length does not always provide better damping than the shorter ones.

Original languageEnglish
Pages (from-to)893-910
Number of pages18
JournalJournal of Sound and Vibration
Volume264
Issue number4
DOIs
Publication statusPublished - 2003 Jul 17

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Acoustics and Ultrasonics
  • Mechanical Engineering

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