Design and Operation for Abnormal Conditions III

538 Pages·2005·21.51 MB·English

RINA

INTERNATIONAL CONFERENCE

DESIGN AND OPERATION FOR
ABNORMAL CONDITIONS III

26 – 27 January 2005

© 2005: The Royal Institution of Naval Architects

The Institution is not, as a body, responsible for the
opinions expressed by the individual authors or
speakers

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ISBN No: 1-905040-08-3
Investigation into the influence of Forecastles, Bow
Visors and Pitched Hatch Covers on Green Water
Loads
Benedict Graat
Investigation into the influence of forecastles, bow
visors and pitched hatch covers on green water
loads
Investigate the influence of pitched hatch
covers, forecastles and bow visors on
green water loads
Validate Hoi Sang Chaungs 2D Motion
Program
Investigate the use of Buchner
Pressure Formula and Spectrum
Analysis techniques as a design stage
method to predict green water loadings
Investigation into the influence of Forecastles, Bow Visors and Pitched Hatch
Covers on Green Water Loads
MV Derbyshire
Green seas
Behaviour of green water
Conditions giving rise to green water loading
Design features to defend against green seas
Analytical Investigation
Design stage method to predict loadings
Model Tests
Empirical Relationships
Conclusions
MV Derbyshire
Supporting Evidence from the Wreckage
Supporting Evidence from the Wreckage
Green Seas
Vertical motion relative to the local wave elevation exceeds
the local freeboard
Behaviour of Green Water
Sequence of Events
Relative wave motions around
the bow
Water flows onto the deck
Shallow water wave over the deck
Final impact of water to
the structure
Bow goes down into a wave and creates a vertical
wall of water around the bulwark