AN IMPROVED FLUID LOADING MODEL FOR CYLINDERS IN RANDOM WAVES
The problem of predicting the hydrodynamic forces on fully submerged horizontal cylinders in random waves, from a knowledge of the time-varying wave elevation, is considered. A new dynamic model is proposed, derived from the results of a comprehensive set of new, regular wave experiments, which takes account of both memory and non-linear effects. The model is composed of two parallel paths, one containing a linear transfer function and the other a zero-memory non-linearity in series with another linear transfer function. Application of the mode to random wave test data shows that the use of this new model, in a predictive mode, leads to significant improvements, compared with the use of Morison's equation, particularly with regard to the prediction of peak forces, where the greatest need for improvement exists.
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Supplemental Notes:
- OMAE 1995, 14th Intl Conf on Offshore Mechanics & Arctic Engng; 18-22 June 1995; Copenhagen, Denmark. Sponsored by ASME et al. Procs. Publ by ASME, ISBN 0-7918-1306-1. Vol I, Pt A, p 179 [10 p, 16 ref, 1 tab, 8 fig]
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Authors:
- Roberts, J B
- DUNNE, J F
- Ding, Z
- Publication Date: 1995
Language
- English
Subject/Index Terms
- TRT Terms: Cylindrical bodies; Force; Mathematical models; Waves
- Uncontrolled Terms: Numerical models
- Old TRIS Terms: Random seas; Wave forces on structures
- Subject Areas: Marine Transportation; Materials;
Filing Info
- Accession Number: 00717739
- Record Type: Publication
- Source Agency: British Maritime Technology
- Files: TRIS
- Created Date: Mar 4 1996 12:00AM