Measurements of global and local effects of wave impact on a fixed platform deck

Abdussamie, Nagi; Ojeda, Roberto Suárez; Thomas, Giles; Amin, W

doi:10.1177/1475090216636410

Cited by 9 publications

(7 citation statements)

References 24 publications

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“…The model was divided into two modules, namely a hull module (columns and pontoons) and a topside deck module. Having these separate modules allowed testing of the deck individually and the deck and hull as a combined structure (Abdussamie et al, 2016a, Abdussamie et al, 2016b. The model was designed to be as stiff and as watertight as possible.…”

Section: Tlp Modelmentioning

confidence: 99%

Experimental investigation of wave-in-deck impact events on a TLP model

et al. 2017

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Model tests were conducted to investigate the global response of a conventional tension leg platform (TLP) due to wave-in-deck loads associated with extreme wave events in irregular long-crested waves of a cyclonic sea state. The experimental setup was designed to allow for the simultaneous measurement of wave surface elevations, rigid body motions, tendon tensions, as well as the pressure distribution at the model's deck underside. The obtained results demonstrated the variability of all the measurements and provided insights into the effect of wave-in-deck loads on the platform behaviour, tendon tensions and slamming pressures and showed qualitative correlations between these parameters. Based on the repeated tests in several events with different wave parameters, general observations and conclusions were made with respect to the platform dynamics during the deck impact, tendon tensions, slack tendon situations, tendon ringing and local impact pressures. The results of this study could be used for calibrating computational fluid dynamics (CFD) tools.

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Section: Tlp Modelmentioning

confidence: 99%

Experimental investigation of wave-in-deck impact events on a TLP model

et al. 2017

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“…The pressure field along the bottom surface remained stable under the regular wave condition. Abdussamie et al (2016) adopted a thick deck (simplification of a tension leg platform) to study the wave impact, but they only focused on the impact event over the bottom wall. The static set-down of the deck had a significant effect on the loads over the bottom surface of deck.…”

Section: Introductionmentioning

confidence: 99%

An experimental and numerical study of plunging wave impact on a box-shape structure

2019

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The plunging wave impacts on a box-shape structure are investigated experimentally and numerically, focusing on three typical scenarios with distinct features, i.e. the wave impact occurs after, upon and before wave breaking. In the experiments, the plunging wave is generated by a piston-type wave maker whose motion is governed by the focused wave theory. The fixed box-shape structure mimics the offshore platform structures. Measured are the wave elevations at typical positions, the wave impact pressures on the front and bottom (violent impact is very likely to occur) of the platform, and the wave profiles of the transient wave impact process. The experiment identifies the pressure maximums both on the front and bottom walls under three different wave impacts. The pressure oscillation along the front wall is observed and analyzed by examining the evolution of air cavity. The experimental parameters and dimensions including the actual wave maker motion signal was inputted into the numerical model to reproduce the same case. Numerical simulations using an improved immersed boundary method are compared with the experimental results with roughly good agreements being achieved. Besides, numerical pressure distributions along the front and bottom walls are presented to find different modes of wave impact. Finally, the maximal pressures on the front wall of the box-shape structure are normalized by two approaches, and compared with the documented maximal pressure ranges.

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“…The model was fixed by attaching it to a rigid beam mounted across the AMC towing tank. All details of model's dimensions and instrumentation, as well as the experimental setup, can be found in the open literature (Abdussamie et al, 2016a, Abdussamie et al, 2016b.…”

Section: Methodsmentioning

confidence: 99%

The Impact of Extreme Wave Events on a Fixed Multicolumn Offshore Platform

Abdussamie

Ojeda

Drobyshevski

et al. 2017

IJOPE

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This paper presents an experimental and numerical investigation into the magnitude and distribution of the hydrodynamic loads affecting a fixed, multicolumn offshore platform (rigidly mounted TLP) when subjected to extreme wave events. All wave load components, including wave-in-deck slamming pressures, were predicted using a commercial CFD code STAR-CCM+ and compared against experimental measurements. Slamming pressures were calculated using both data obtained locally at discrete points and globally averaged over the whole exposed area of the deck. In all simulated cases, the deck area exposed to a wave slamming event was found to be in contact with a water-air mixture with a significant proportion of air phase. It was concluded that the slamming pressure data for the exposed area provided better insights into the pressure changes due to air compressibility and its content.

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Measurements of global and local effects of wave impact on a fixed platform deck

Cited by 9 publications

References 24 publications

Experimental investigation of wave-in-deck impact events on a TLP model

Experimental investigation of wave-in-deck impact events on a TLP model

An experimental and numerical study of plunging wave impact on a box-shape structure

The Impact of Extreme Wave Events on a Fixed Multicolumn Offshore Platform

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