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 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 strain energy method is presented to confirm the possible use of the modal strain energy method as a design tool.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1990
Accession Number
ADA230295

Entities

People

  • Michael J. Bateman

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accelerometers
  • Classification
  • Composite Materials
  • Engineering
  • Equations Of Motion
  • Finite Element Analysis
  • Frequency Response
  • Frequency Shift
  • Measurement
  • Mechanical Engineering
  • Naval Warfare
  • Numerical Analysis
  • Resonant Frequency
  • Schools
  • Shear Modulus
  • United States
  • United States Naval Academy

Fields of Study

  • Physics

Readers

  • Structural Dynamics.