Constrained Viscoelastic Layer Damping of Thick Aluminum Plates: Design, Analysis and Testing

Abstract

Modern naval warfare has been increasingly dependent upon the acoustic silencing of the participants. Constrained viscoelastic layer damping of vibrating elements is one method which can be used to meet acoustic silencing goals. This paper considers constrained viscoelastic layer damping treatments applied to a thick aluminum plate, including single layer, double layer, a milled pocket plate, and a milled 'floating element' configuration. High modal damping values were obtained for each damping configuration. The Modal Strain Energy method, using finite element analysis to estimate modal loss factors, was investigated for use as a tool in constrained viscoelastic layer damping design. A comparison of experimentally measured frequency response and modal loss factors with those predicted by the modal stain energy method is presented to confirm the possible use of the modal strain energy method as a design tool. Keywords: Vibration, Damping, Viscoelastic material, Constrained layer damping.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1990
Accession Number
ADA226556

Entities

People

  • Ki‐Seok Kim
  • Michael J. Bateman
  • Young-sik Shin

Organizations

  • Naval Postgraduate School

Tags

DTIC Thesaurus Topics

  • Accelerometers
  • Aluminum
  • Composite Materials
  • Computers
  • Equations
  • Equations Of Motion
  • Finite Element Analysis
  • Frequency
  • Frequency Response
  • Frequency Shift
  • Interpolation
  • Materials
  • Measurement
  • Mechanical Engineering
  • Naval Warfare
  • Numerical Analysis
  • Resonant Frequency

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Mechanical Engineering/Mechanics of Materials.