This article describes a series of model tests conducted to examine extreme wave events associated with tropical cyclonic conditions and their impacts on an offshore deck structure. Extreme waves of a representative cyclonic sea state were examined in a towing tank within long-crested irregular wave trains. Experimental results presented include global forces and localised slamming pressures acting on a rigidly mounted box-shaped deck, which represents a simplified topside structure of a tension leg platform. The effect of static set-down on the still-water air gap was investigated by applying an equivalent reduction for the deck clearance. It was found that a small reduction of 20 mm (2.5 m full scale) in the original deck clearance can lead to a doubling of the magnitude of the horizontal force and the vertical upward-directed force components, as well as significantly increased slamming pressures in many locations on the deck underside.

Item Type:	Refereed Article
Keywords:	tropical cyclones, offshore platforms, wave-in-deck impact loads
Research Division:	Engineering
Research Group:	Maritime engineering
Research Field:	Ocean engineering
Objective Division:	Energy
Objective Group:	Energy exploration
Objective Field:	Oil and gas exploration
UTAS Author:	Abdussamie, N (Dr Nagi Abdussamie)
UTAS Author:	Ojeda, R (Dr Roberto Ojeda Rabanal)
UTAS Author:	Amin, W (Dr Walid Amin)
ID Code:	111628
Year Published:	2017 (online first 2016)
Web of Science® Times Cited:	11
Deposited By:	NC Maritime Engineering and Hydrodynamics
Deposited On:	2016-09-27
Last Modified:	2017-11-20
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