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Vibration and Dynamic Stability of Pipes Conveying Fluid on Elastic Foundations  

Ryu, Bong-Jo (Department of Mechanical Design Engineering, Hanbat National University)
Ryu, Si-Ung (Operation & Research Division, Korea Basic Science Institute)
Kim, Geon-Hee (Operation & Research Division, Korea Basic Science Institute)
Yim, Kyung-Bin (Department of Mechanical Engineering Dongyang Technical College)
Publication Information
Journal of Mechanical Science and Technology / v.18, no.12, 2004 , pp. 2148-2157 More about this Journal
Abstract
The paper deals with the vibration and dynamic stability of cantilevered pipes conveying fluid on elastic foundations. The relationship between the eigenvalue branches and corresponding unstable modes associated with the flutter of the pipe is thoroughly investigated. Governing equations of motion are derived from the extended Hamilton's principle, and a numerical scheme using finite element methods is applied to obtain the discretized equations. The critical flow velocity and stability maps of the pipe are obtained for various elastic foundation parameters, mass ratios of the pipe, and structural damping coefficients. Especially critical mass ratios, at which the transference of the eigenvalue branches related to flutter takes place, are precisely determined. Finally, the flutter configuration of the pipe at the critical flow velocities is drawn graphically at every twelfth period to define the order of the quasi-mode of flutter configuration.
Keywords
Elastic Foundations; Pipe Conveying Fluid; Eigenvalue Branches; Flutter Configuration; Structural Damping;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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