RESPONSE OF A CIRCULAR CYLINDER IN REGULAR AND RANDOM OSCILLATORY FLOW AT KC=10
Regular and random oscillatory flow around a circular cylinder have been computed at KC=10 with beta=50 using the random vortex method. The cylinder is given a low mass and damping to allow response with two degrees of freedom. One aim is to test the predictive capability of the Morison equation with relative motion terms in flows where vortex shedding occurs. Cases with Fr=1, 2, 2.5 and 2.95 have been investigated. For the latter three values rms in-line response is bigger in random than in regular flows while rms cross response is bigger in regular oscillatory flows. The time history of in-line response can be very different from that given by the Morison equation. The rms response given by this equation with CD and CM fitted to the responding cylinder forces is generally underpredicted although there can be close agreement using values for the fixed cylinder.
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Supplemental Notes:
- BOSS 92, 6th Intl Conf on the Behaviour of Offshore Structures; 7-10 July; London, U.K. Procs. Publ by BPP Tech Services Ltd., London. Vol 1, p 308 [14 p, 9 ref, 1 tab, 9 fig]
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Authors:
- Slaouti, A
- Stansby, P K
- Publication Date: 1992
Language
- English
Subject/Index Terms
- TRT Terms: Cylindrical bodies; Dynamic loads; Numerical analysis; Oscillation; Vortex shedding
- Uncontrolled Terms: Dynamic response
- Subject Areas: Marine Transportation; Materials;
Filing Info
- Accession Number: 00716268
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Feb 28 1996 12:00AM