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RESEARCH PAPERS

Vibration of a Loosely Held Tube

[+] Author and Article Information
R. D. Blevins

General Atomic Company, San Diego, Calif.

J. Eng. Ind 97(4), 1301-1304 (Nov 01, 1975) (4 pages) doi:10.1115/1.3438752 History: Received May 23, 1975; Online July 15, 2010

Abstract

The results of a series of over 700 measurements of the tube damping and natural frequency of heat exchanger tubes are presented. The damping and frequency measurements of the loosely held tube show considerable scatter. Damping increased slightly with increasing excitation force or decreasing preload applied to the tube. Increasing the proportion of the tube length held in the support strongly increased damping. Third mode vibrations were more lightly damped than first mode vibrations. The resonance frequency increased with static preload applied to the tube.

Copyright © 1975 by ASME
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