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Dynamic analysis of a dual-spar floating offshore wind farm with shared moorings in extreme environmental conditions
https://orcid.org/0000-0002-4332-4676
Abstract The concept of a shared mooring system was proposed to reduce mooring and anchoring costs. Shared moorings also add complexity to the floating offshore wind farm system and pose design challenges. To understand the system dynamics, this paper presents a dynamic analysis for a dual-spar floating offshore wind farm with a shared mooring system in extreme environmental conditions. First, a numerical model of the floating offshore wind farm was established in a commercial simulation tool. Then, time-domain simulations were performed for the parked wind farm under extreme wind and wave conditions. A sensitivity study was carried out to investigate the influence of loading directions and shared line mooring properties. To highlight the influence of the shared line, the results were compared to those of a single spar floating wind turbine, and larger platform motions and higher tension loads in single lines are observed for the wind farm with shared moorings. The loading direction affects the platform motions and mooring response of the floating offshore wind farm. Comparing the investigated loading directions to the 0-deg loading direction, the variation of mean mooring tension at the fairlead is up to 84% for single lines and 16% for the shared line. The influence of the shared line properties in the platform motions and the structural responses is limited. These findings improve understanding of the dynamic characteristics of floating offshore wind farms with a shared mooring system.
Highlights A shared mooring system is applied to a dual-spar floating offshore wind farm. Extreme wind and wave conditions are considered in the dynamic analysis. Dynamics of the wind farm is compared with that of a single floating wind turbine. Mooring stiffness linearization is performed to elucidate physical characteristics. Mooring tension, tower-bottom bending moment, and platform motions are analyzed. The influence of loading directions and shared line properties on responses is shown.
Dynamic analysis of a dual-spar floating offshore wind farm with shared moorings in extreme environmental conditions
https://orcid.org/0000-0002-4332-4676
Abstract The concept of a shared mooring system was proposed to reduce mooring and anchoring costs. Shared moorings also add complexity to the floating offshore wind farm system and pose design challenges. To understand the system dynamics, this paper presents a dynamic analysis for a dual-spar floating offshore wind farm with a shared mooring system in extreme environmental conditions. First, a numerical model of the floating offshore wind farm was established in a commercial simulation tool. Then, time-domain simulations were performed for the parked wind farm under extreme wind and wave conditions. A sensitivity study was carried out to investigate the influence of loading directions and shared line mooring properties. To highlight the influence of the shared line, the results were compared to those of a single spar floating wind turbine, and larger platform motions and higher tension loads in single lines are observed for the wind farm with shared moorings. The loading direction affects the platform motions and mooring response of the floating offshore wind farm. Comparing the investigated loading directions to the 0-deg loading direction, the variation of mean mooring tension at the fairlead is up to 84% for single lines and 16% for the shared line. The influence of the shared line properties in the platform motions and the structural responses is limited. These findings improve understanding of the dynamic characteristics of floating offshore wind farms with a shared mooring system.
Highlights A shared mooring system is applied to a dual-spar floating offshore wind farm. Extreme wind and wave conditions are considered in the dynamic analysis. Dynamics of the wind farm is compared with that of a single floating wind turbine. Mooring stiffness linearization is performed to elucidate physical characteristics. Mooring tension, tower-bottom bending moment, and platform motions are analyzed. The influence of loading directions and shared line properties on responses is shown.
Dynamic analysis of a dual-spar floating offshore wind farm with shared moorings in extreme environmental conditions
https://orcid.org/0000-0002-4332-4676
Abstract The concept of a shared mooring system was proposed to reduce mooring and anchoring costs. Shared moorings also add complexity to the floating offshore wind farm system and pose design challenges. To understand the system dynamics, this paper presents a dynamic analysis for a dual-spar floating offshore wind farm with a shared mooring system in extreme environmental conditions. First, a numerical model of the floating offshore wind farm was established in a commercial simulation tool. Then, time-domain simulations were performed for the parked wind farm under extreme wind and wave conditions. A sensitivity study was carried out to investigate the influence of loading directions and shared line mooring properties. To highlight the influence of the shared line, the results were compared to those of a single spar floating wind turbine, and larger platform motions and higher tension loads in single lines are observed for the wind farm with shared moorings. The loading direction affects the platform motions and mooring response of the floating offshore wind farm. Comparing the investigated loading directions to the 0-deg loading direction, the variation of mean mooring tension at the fairlead is up to 84% for single lines and 16% for the shared line. The influence of the shared line properties in the platform motions and the structural responses is limited. These findings improve understanding of the dynamic characteristics of floating offshore wind farms with a shared mooring system.
Highlights A shared mooring system is applied to a dual-spar floating offshore wind farm. Extreme wind and wave conditions are considered in the dynamic analysis. Dynamics of the wind farm is compared with that of a single floating wind turbine. Mooring stiffness linearization is performed to elucidate physical characteristics. Mooring tension, tower-bottom bending moment, and platform motions are analyzed. The influence of loading directions and shared line properties on responses is shown.
Dynamic analysis of a dual-spar floating offshore wind farm with shared moorings in extreme environmental conditions
Liang, Guodong (author) / Jiang, Zhiyu (author) / Merz, Karl (author)
Marine Structures ; 90
2023-02-27
Article (Journal)
Electronic Resource
English
Seismic Response of Spar Floating Offshore Wind Turbine
| Springer Verlag | 2024
| BASE | 2022