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Shock and Vibration
Volume 4, Issue 2, Pages 77-91
http://dx.doi.org/10.3233/SAV-1997-4201

Dynamic Behavior of Tubes Subjected to Internal and External Cross Flows

Yii-Mei Huang and Chih-Shan Hsu

Department of Mechanical Engineering, National Central University, Chung-Li, Taiwan, 320, China

Revised 20 October 1995; Accepted 17 October 1996

Copyright © 1997 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This article presents a method for thoroughly examining the dynamic characteristics of a tube under the influence of either the internal flow or the external cross flow. The tube is modeled as a thin cylindrical shell whose governing equations are derived from an energy method. The effects due to internal flow are introduced into the system through initial stress. Galerkin’s method in conjunction with the method of multiple scales is employed for obtaining the stability of the tube vibration. According to the results, instability can occur under certain conditions of resonance. Regarding the effects of the external cross flow, a numerical approach is initially employed to interpolate the experimental data of the pressure distributions due to the flow. The dynamic characteristics of the tube under steady flows and flows with small time variation are then investigated. Stability of the solution is also discussed.