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RESEARCH PAPERS

Flow-Induced Vibrations of Metal Bellows

[+] Author and Article Information
C. R. Gerlach

Department of Mechanical Sciences, Southwest Research Institute, San Antonio, Texas

J. Eng. Ind 91(4), 1196-1202 (Nov 01, 1969) (7 pages) doi:10.1115/1.3591771 History: Received December 05, 1968

Abstract

Results are given of an experimental and analytical study of longitudinal vibrations resulting from internal flow in metal bellows. It is shown that vortex shedding from the convolutions is the fluid excitation mechanism responsible for the vibrations. An N-degree-of-freedom spring-mass mechanical model is presented which is useful for predicting the bellows frequencies, and methods for estimating the fluid added mass for use in the model are discussed. Results of experiments designed to determine the vortex shedding forces are presented. An argument is given advocating the use of an effective vortex shedding force coefficient for vortex shedding excitation problems because of inaccuracies in experimentally obtained vortex amplitude and phase angle data.

Copyright © 1969 by ASME
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