MATERIALS APPROACHES TO SHIP SILENCING

A survey of high-damping materials shows that two basic alloy systems, Ni-Ti and Cu=Mn, currently have been developed to the point of commercial availability and general engineering attractiveness. Alloys from both systems have the potential of wide application for noise/vibration reduction. The damping capacity of these 'quiet metals' is so unusually high that new methods of design integration for noise reduction should be developed. The NPS research program in FY 74 has concentrated on the characterization of metallurgical factors (such as stress, deformation, and aging) affecting damping capacity in Cu-Mn-base alloys, and has studied the control of damping properties through thermomechanical processing. The program has also evaluated the effectiveness of various techniques to measure damping properties in high-damping alloys; torsion pendulum, resonant bar, and ultrasonic pulse-echo methods have been examined. (Author)

• Corporate Authors:

  Naval Postgraduate School

  1 University Circle
  Monterey, CA  United States  93943
• Authors:
  • Perkins, J
  • EDWARDS, G R
  • Hills, N A
• Publication Date: 1974-6

Media Info

• Pagination: 63 p.

Subject/Index Terms

• TRT Terms: Damping (Engineering); Damping (Physics); Noise; Noise control; Ships
• Uncontrolled Terms: Noise reduction
• Old TRIS Terms: Shipboard noise
• Subject Areas: Design; Environment; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00072409
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NPS-59Ps74061 Final Rpt.
• Files: TRIS
• Created Date: Nov 12 1974 12:00AM