Therefore in the next step we introduce various installation methods for offshore pipelines and what may govern the choice of an installation method / scenario. Installation also plays an important and vital role. In the literature survey stage we elaborate on basic information about different types of offshore pipelines.

Pages: 133 + enclosure: CD Contains OrcaFlex filesĪbstract This master thesis is describing the theoretical & analytical principles of pipeline installation. Installation of steel pipelines and flexible pipelines in sideway currentĬredits (ECTS): 30 Key words: Steel pipeline, Flexible pipeline, Installation, Sideway current, Makassar Strait, OrcaFlex Ove Tobias Gudmestad External supervisor(s): - Titel of thesis:

(Writers signature) Faculty supervisor: Prof. The numerical model and research results in this paper can provide some guidance for the research and construction of the cable laying of booster stations for marine renewable energy power plants in real sea conditions.MASTERS THESIS Study program/ Specialization: Offshore Technology - Marine Technology and And the variation of effective tension at both cable ends can reach 1.67 times that of cable ends under usual random waves. When extreme waves appear, pitch, heave and heave acceleration of the laying ship and tension of the cable ends increases obviously. The current also has some influences on the submarine cable laying, and the maximum effective tension of cable produced by the combined wave-current action is 1.35 times that of cable with the wave action alone. Research results show that the tension and curvature of the cable are large under the condition for wave direction perpendicular to the ship axial direction, which is a relatively bad sea condition. usual waves, waves with current combined and possible extreme waves. The motion response of laying ship and the hydrodynamic characteristics of submarine cables are simulated here under three sea conditions, i.e. The numerical model is established with the Orcaflex software employed. Coconut Creek (Florida), ISSN 0749-0208.īased on real sea conditions of the national wave energy demonstration site in Wanshan sea area of Zhuhai City, China, some numerical experiments are carried out to simulate the submarine cables initial laying process of the Wave Energy Booster Station in this demonstration site. Journal of Coastal Research, Special Issue No. (eds.), Air-Sea Interaction and Coastal Environments of the Maritime and Polar Silk Roads. Numerical study on initial laying process of submarine cables for wave energy booster station in real sea states.

Orcaflex coordinate system