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Lowering Perforated Plate through Splash Zone under Different Sea States


Zhang, W and Chai, S and Nguyen, HD and Jin, Y, Lowering Perforated Plate through Splash Zone under Different Sea States, Proceedings of the 6th Society for Underwater Technology Technical Conference (SUTTC) 2017, 23-24 November 2017, Haikou, China, pp. 1-7. (2017) [Keynote Presentation]

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Accurate prediction on the hydrodynamic coefficients of offshore structures with large horizontal surface is critical in offshore installation operation, especially when crossing splash zone. The structures may encounter various wave condition and experience significant impact force which leads to unexpected impulsive load on the hoisting system and limitation of the operation window for offshore installation.

This paper aims to determine the impact of the slamming coefficient on splash zone crossing modelling, through a series of time domain simulations for perforated plate under different sea states. The slamming coefficients are determined by the unsteady Reynolds-Averaged Navier-Stokes (URANS) solver of STAR-CCM+, combined with the recommended value from design code DNV-RP-H103. With the obtained coefficients, the lowering operation of perforated plated is simulated in OrcaFlex. The result indicates that the slack probability is underestimated using the recommended slamming coefficient from DNV code for offshore structures with a large horizontal surface such as perforated plate in this study. In addition, the influence of passive heave compensator (PHC) is investigated through a series of deployment simulations for the perforated plate with and without PHC. Based on the results, the existence of the PHC is critical for installation operation at the wave period from 3 to 10 seconds in order to achieve a satisfactory factor of safety.

Item Details

Item Type:Keynote Presentation
Keywords:Splash zone crossing, perforated plate, and slamming coefficients.
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Ocean engineering
Objective Division:Energy
Objective Group:Processing of energy sources
Objective Field:Processing of energy sources not elsewhere classified
UTAS Author:Zhang, W (Mr Wei Zhang)
UTAS Author:Chai, S (Professor Shuhong Chai)
UTAS Author:Nguyen, HD (Dr Hung Nguyen)
UTAS Author:Jin, Y (Mr Yuting Jin)
ID Code:123171
Year Published:2017
Deposited By:Governance Office
Deposited On:2017-12-19
Last Modified:2018-11-12
Downloads:2 View Download Statistics

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