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Introduction to Offshore Operation
Published in Shashi Shekhar Prasad Singh, Jatin R. Agarwal, Nag Mani, Offshore Operations and Engineering, 2019
Shashi Shekhar Prasad Singh, Jatin R. Agarwal, Nag Mani
Environmental conditions/metocean conditions have a direct bearing on any coastal or offshore project, as well as the project’s operation and maintenance. The selection of equipment, system, location, operational strategy, etc. also depends on these conditions. In addition, environmental conditions influence the financial decision-making regarding the project and operation.
Geotechnical modelling for offshore renewables
Published in Andrew McNamara, Sam Divall, Richard Goodey, Neil Taylor, Sarah Stallebrass, Jignasha Panchal, Physical Modelling in Geotechnics, 2018
C. Gaudin, C.D. O’Loughlin, B. Bienen
Loading of an offshore renewable energy device is expected to vary in cyclic loading magnitude, load eccentricity and even directionality. The latter has different origins, depending on the type of renewable energy installation. For offshore wind turbines, this relates closely to changes in metocean conditions over the design life of the structure.
Consequence analyses of collision-damaged ships — damage stability, structural adequacy and oil spills
Published in Ships and Offshore Structures, 2023
Artjoms Kuznecovs, Jonas W. Ringsberg, Anirudh Mallaya Ullal, Pavan Janardhana Bangera, Erland Johnson
Since one of the purposes of the methodology is that it should be used as a prevention measure to reduce negative consequences from ship-ship collisions, a METOCEAN conditions analysis module is integrated to identify plausible sea state conditions at the geographical location specified by the analyst. The METOCEAN module is an in-house code that collects and post-processes historical metocean conditions at a given geographic location by retrieving time-variant wave data from Copernicus Marine Service (CMEMS, 2022). The analyst can study monthly, seasonal, and annual statistics at the specified latitude and longitude. The code presents statistics and probabilities of the wave directions, significant wave heights, and ocean current directions and magnitudes. The intervals/ranges of these properties are defined and plotted for visualisation in rose plots. Figure 2 presents an example of the probability of the significant wave height for different intervals of wave directions. The struck ship is in the centre, and the sectors indicate which direction the waves are coming from. The results are plotted for latitude 57.61° and longitude 11.51° in Kattegat (between Sweden and Denmark) and are based on metocean statistics for the spring season between 2016 and 2020; the 0°-direction represents geographic north.
Extreme loads analysis of a site-specific semi-submersible type wind turbine
Published in Ships and Offshore Structures, 2020
Xiaosen Xu, Oleg Gaidai, Arvid Naess, Prasanta Sahoo
High-quality metocean data with high temporal resolution is often difficult to find. The data source for this project was the National Oceanic and Atmospheric Administration (NOAA). The NOAA organisation maintains an extensive network of floating data-collection buoys scattered throughout the US and international waters. Data from these buoys can be found at the National Data Buoy Center (https://www.ndbc.noaa.gov/).