Study on the Fluidelastic Vibration of Tube Arrays Using Modal Analysis Technique

[+] Author and Article Information
K. Ohta, K. Kagawa, H. Tanaka, S. Takahara

Nagasaki Technical Institute, Technical Headquarters, Mitsubishi Heavy Industries, Ltd., Nagasaki City, Japan

J. Pressure Vessel Technol 106(1), 17-24 (Feb 01, 1984) (8 pages) doi:10.1115/1.3264302 History: Received December 15, 1982; Revised November 04, 1983; Online November 05, 2009


This paper presents a method to calculate the critical flow velocity of fluidelastic vibration of tube arrays in heat exchangers. The method is based upon the modal analysis technique, which combines the fluid dynamic force caused by cross flow and the vibration characteristics of the complicated tube array to obtain its response. The analytical method enables us not only to take into account the vibration mode of tube array and nonuniformity of velocity and density distribution of cross flow, but also to estimate the effect of antivibration devices, such as spacer, connecting band, and so on. Numerical examples of constrained single-tube array, multi-tube array in reversed flow, and group of panels with spacers are described.

Copyright © 1984 by ASME
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