ROLL OF A SHIP IN ASTERN SEAS--RESPONSE TO GM FLUCTUATIONS
An effect of astern seas on a ship is to produce fluctuations in the metacentric height (GM) of the ship. GM fluctuations are shown to produce an effect analogous to a reduction in the roll damping. Roll damping reductions are predicted for two extreme types of random GM fluctuations: wide-band and narrow-band random processes. Numerical simulations of the roll motion of a ship with realistic random GM fluctuations are used to compare with the predictions of damping reduction. Good agreement is found. Implications of a reduced roll damping are discussed.
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- Journal article
- Dunwoody, A B
- Publication Date: 1989-12
- Features: References;
- Pagination: 7 p.
- TRT Terms: Following seas; Metacentric height; Rolling; Variables
- Old TRIS Terms: Astern seas; Variations
- Subject Areas: Hydraulics and Hydrology; Marine Transportation;
- Accession Number: 00659100
- Record Type: Publication
- Source Agency: Maritime Technical Information Facility
- Files: TRIS
- Created Date: Jul 21 1994 12:00AM