Materials approaches to ship silencing
By: J. Perkins, G. R. Edwards, N. Hills
Contributors: Edwards, Glen Robert; Hills, Norman A.; Naval Postgraduate School (U.S.)
Publisher: Naval Postgraduate School
Published: 1974
Place of publication: Monterey, California
Language: eng
Number of pages: 57
Subjects: Noise; Vibration (Marine engineering); Materials; Damping (Mechanics); Mathematical models; Ships
Description: 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.
Notes: "NPS-59PS74061"--Cover.

"June 1974"--Cover.

Title from cover.

"Prepared for: Naval Ship Systems Command, Ship Silencing Program, NAVSHIPS Code 037, CAPT L. H. Beck, Washington, D. C. 20350."

"FY 74 final report for period July 1973 - April 1974."

Includes bibliographical references (p. 55)

"Approved for public release; distribution is unlimited"--Cover.

Technical report; 1974.

ck/ oclc 7/8/09.