DEVELOPMENT OF DAMPING TREATMENTS FOR NEW CONSTRUCTION SUBMARINES

Abstract

The development of elastomeric materials to replace chromated felt in constrained-layer treatments for damping heavy plating in new construction submarines is discussed. A new treatment, Treatment 230, was developed which consisted of an aluminum constraining layer 1-1/4 in. thick, and perforated butyl rubber damping layer, 1/16 in. thick, which was made from stock 384-597. The treatment was tested on a 1-3/4 in. thick steel bar. Its weight was 25% of the weight of the bar. Average damping by the new treatment between 50 and 2000 c was 5.8% of critical at 35 F, and 2.6% at 120 F. This treatment was less sensitive to temperature changes between 35 and 120 F than a similar chromated-felt treatment, Treatment 198. It also yielded higher damping than Treatment 198 between 35 and 55 F, and between 100 and 120 F, but lower dampings between 60 and 85 F. At 35 F, the new treatment was fivefold as effective as Treatment 198. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 27, 1962
Accession Number
AD0285217

Entities

People

  • Jacob Oser

Tags

DTIC Thesaurus Topics

  • Aluminum
  • Amorphous Materials
  • Biomedical And Dental Materials
  • Butyl Rubber
  • Climate Change
  • Construction
  • Construction Materials
  • Elastomers
  • Films
  • Materials
  • Polymeric Films
  • Rubber
  • Specialty Uses Of Chemicals
  • Submarines

Readers

  • Metallurgy
  • Structural Dynamics.
  • Surface Coatings Technology.