When a circular, loosely supported tube is subjected to fluid forces and vibrates with a large amplitude, the tube may continually collide with support structures and show wear. As a result, the tube is considered to reveal non-linearities such as chaotic behaviors, that depend on the support conditions and the fluid flow conditions. In the present study, a cantilever tube having a loose support at the free end is mathematically modeled based on the FEM. The nonlinear vibration analysis is performed by using the DAE (Differential Algebraic Equation) for the three kinds of excitation forces: (a) harmonic exciting forces, (b) nonlinear fluid forces, such as the Iwan & Blevins wake oscillator model etc., and (c) random fluid forces. The chaotic behavior and the wear damage are investigated for these fluid forces by taking the structural damping ratio and the gap size, for example, as parameters. Moreover, the influences of the chaotic phenomena on the deviation from the deterministically predicted wear volume at the tube support location are discussed.
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ASME 2003 Pressure Vessels and Piping Conference
July 20–24, 2003
Cleveland, Ohio, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
0-7918-4156-1
PROCEEDINGS PAPER
Chaotic Vibration and Wear Characteristics of a Circular Loosely Supported Tube Subjected to a Fluid Flow
Katsuhisa Fujita
,
Katsuhisa Fujita
Osaka Prefecture University, Sakai, Osaka, Japan
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Hiroyuki Nishiumi
,
Hiroyuki Nishiumi
Osaka Prefecture University, Sakai, Osaka, Japan
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Tomohiro Ito
Tomohiro Ito
Osaka Prefecture University, Sakai, Osaka, Japan
Search for other works by this author on:
Katsuhisa Fujita
Osaka Prefecture University, Sakai, Osaka, Japan
Hiroyuki Nishiumi
Osaka Prefecture University, Sakai, Osaka, Japan
Tomohiro Ito
Osaka Prefecture University, Sakai, Osaka, Japan
Paper No:
PVP2003-2082, pp. 127-137; 11 pages
Published Online:
August 13, 2008
Citation
Fujita, K, Nishiumi, H, & Ito, T. "Chaotic Vibration and Wear Characteristics of a Circular Loosely Supported Tube Subjected to a Fluid Flow." Proceedings of the ASME 2003 Pressure Vessels and Piping Conference. Flow-Induced Vibration. Cleveland, Ohio, USA. July 20–24, 2003. pp. 127-137. ASME. https://doi.org/10.1115/PVP2003-2082
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