Browsing NTNU Open by Author "Bachynski-Polic, Erin Elizabeth"
Now showing items 1-20 of 28
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Analysis of a Hybrid Mooring System Concept for a Semi-Submersible Wind Turbine in Intermediate Water Depth Under Operational, Extreme, and Yaw Error Conditions
Cao, Qun; Bachynski-Polic, Erin Elizabeth; Gao, Zhen; Xiao, Longfei; Cheng, Zhengshun; Liu, Mingyue (Chapter, 2022)A hybrid mooring system consisting of catenary chains and a series of clump weights was designed for the intermediate water depth, for a floating semi-submersible wind turbine. The use of multiple clump weights in the ... -
Analysis of difference-frequency wave loads and quadratic transfer functions on a restrained semi-submersible floating wind turbine
Li, Haoran; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2021)One of the concerns regarding numerical simulation of floating wind turbines (FWTs) in waves is underprediction of resonant responses in the low-frequency range. In the present work, the difference-frequency wave loads on ... -
Application of a lumping method for fatigue design of monopile-based wind turbines using fully coupled and simplified models
Katsikogiannis, George; Hegseth, John Marius; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2022)The study presents different methods for fatigue assessment of monopile-based offshore wind turbines. Their accuracy and computational time is compared to full long-term time domain results. The damage-equivalent lumping ... -
Application of a PI-controller to a 25 MW Floating Wind Turbine
Santos, Carlos Renan dos; Abdelmoteleb, Serageldin; Mendoza, Alejandra S. Escalera; Bachynski-Polic, Erin Elizabeth; Griffith, D. Todd; Oggiano, Luca (Chapter, 2022)Proportional-integral controllers are extensively applied to the pitch control of wind turbines. Despite its simplicity, this control strategy achieves good performance in onshore applications. However, the application of ... -
Assessing some statistical and physical modelling uncertainties of extreme responses for monopile-based offshore wind turbines, using metocean contours
Katsikogiannis, George; Haver, Sverre Kristian; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2024)This study examines the influence of probabilistic models for wave parameters in the joint environmental model and hydrodynamic/soil models on extreme mudline bending moments for monopile-based wind turbines at representative ... -
Comparison of laboratory wave generation techniques on response of a large monopile in irregular sea
Hoseini Dadmarzi, Fatemeh; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2022)As the offshore wind industry moves toward larger monopile turbines, model testing and validation of hydrodynamic load models become more important for new designs of turbines. Wave generation is an important aspect of ... -
Comparison of the dynamic wake meandering model against large eddy simulation for horizontal and vertical steering of wind turbine wakes
Rivera Arreba, Irene; Li, Zhaobin; Yang, Xiaolei; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2023)Accurately predicting the evolution of wake is crucial for power output and structural load estimation in wind farms. This study aims to validate the dynamic wake meandering (DWM) model, an efficient mid-fidelity wake ... -
Control Considerations for Very Large Floating Wind Turbines
Santos, Carlos Renan dos; Abdelmoteleb, Serageldin; Mendoza, Alejandra S. Escalera; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2022)Increasingly large floating wind turbines (FWTs) are being introduced to access the offshore wind resource over deep water at lower cost. In connection with designing a 25 MW semi-submersible wind turbine, we examine the ... -
Design, structural modeling, control, and performance of 20 MW spar floating wind turbines
Silva de Souza, Carlos Eduardo; Bachynski-Polic, Erin Elizabeth (Journal article; Peer reviewed, 2022)As floating wind turbines (FWTs) increase in size and power, the relative contribution of wave and wind loads to their global responses differs from what has been observed for 5–10 MW units. In addition, the larger deflections ... -
Effect of atmospheric stability on the dynamic wake meandering model applied to two 12 MW floating wind turbines
Rivera Arreba, Irene; Wise, Adam S.; Eliassen, Lene Vien; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2023) -
Effect of floater flexibility on global dynamic responses of a 15-MW semi-submersible floating wind turbine
Li, Haoran; Gao, Zhen; Bachynski-Polic, Erin Elizabeth; Zhao, Yuna; Fiskvik, Stian (Peer reviewed; Journal article, 2023)Floater structural flexibility plays a significant role in accurate predictions of global dynamic responses of floating wind turbines (FWTs), especially for ultra-large wind turbines with increasing size and cost-effective ... -
Effects of atmospheric stability on the structural response of a 12 MW semisubmersible floating wind turbine
Rivera Arreba, Irene; Wise, Adam S.; Hermile, Mahe; Chow, Fotini K.; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2022)Global dynamic response models used for the design of wind turbines are largely based on neutral stability, which is not representative of real atmospheric conditions. Offshore wind farms, for example, have been seen to ... -
Experimental and numerical analysis of wind field effects on the dynamic responses of the 10 MW SPIC floating wind turbine concept
Cao, Qun; Bachynski-Polic, Erin Elizabeth; Gao, Zhen; Xiao, Longfei; Cheng, Zhengshun; Liu, Mingyue (Journal article; Peer reviewed, 2022) -
Experimental and numerically obtained low-frequency radiation characteristics of the OC5-DeepCwind semisubmersible
Li, Haoran; Bachynski-Polic, Erin Elizabeth (Peer reviewed; Journal article, 2021)Added mass and damping play a significant role in accurate prediction of floating wind turbine (FWT) motions, especially near the resonance frequencies. This paper investigates the still-water hydrodynamic characteristics ... -
Experimental investigation of the hydro-elastic response of a spar-type floating offshore wind turbine
Leroy, Vincent; Delacroix, Sylvain; Merrien, Arnaud; Bachynski-Polic, Erin Elizabeth; Gilloteaux, JC (Journal article; Peer reviewed, 2022)As the size of floating wind turbines continues to increase, floating platforms reach dimensions that make their elastic and hydro-elastic behaviour significant. Several works in connection with the numerical modelling of ... -
Experimental study on the effect of second order wavemaker theory on the response of a flexible large diameter monopile in irregular sea
Hoseini Dadmarzi, Fatemeh; Tonnel, Matthias; Thys, Maxime; Bachynski-Polic, Erin Elizabeth; Kristiansen, Trygve (Peer reviewed; Journal article, 2021)Motivated by the need for larger offshore wind turbines, large diameter monopile foundations are being developed. To ensure safe design, there is a need for model testing and validation of hydrodynamic load models. Scaled ... -
Fatigue design sensitivities of large monopile offshore wind turbines
Sørum, Stian Høegh; Katsikogiannis, Georgios; Bachynski-Polic, Erin Elizabeth; Amdahl, Jørgen; Page, Ana M.; Klinkvort, Rasmus Tofte (Peer reviewed; Journal article, 2022)The input for fatigue analyses of offshore wind turbines is typically chosen based on design values provided by design standards. While this provides a straightforward design methodology, the contribution of different input ... -
Gradient-Based Design Optimization of Fully-Flexible Floating Wind Turbines Using Modal Analysis
Rohrer, Peter Joshua; Bachynski-Polic, Erin Elizabeth; Hegseth, John Marius (Chapter, 2023)A variety of substructure concepts for floating offshore wind have been developed. Design optimization can be used to efficiently explore this design space and guide further work. Previous design optimization studies have ... -
Low-frequency dynamic wake meandering: comparison of FAST.Farm and DIWA software tools
Rivera Arreba, Irene; Eliassen, Lene; Bachynski-Polic, Erin Elizabeth; Panjwani, Balram (Journal article; Peer reviewed, 2021)Most of the global dynamic response models used today for the design of wind turbines are based on the aero-hydro-servo-elastic analysis of one single turbine. However, research on bottom- fixed offshore wind turbines has ... -
OC6 Phase Ib: Validation of the CFD predictions of difference-frequency wave excitation on a FOWT semisubmersible
Lu, Wang; Robertson, Amy; Jonkman, Jason; Yu, Yi-Hsiang; Koop, Arjen; Nadal, Adrià Borràs; Li, Haoran; Bachynski-Polic, Erin Elizabeth; Pinguet, Romain; Shi, Wei; Zeng, Xinmeng; Zhou, Yang; Xiao, Qing; Kumar, Rupesh; Sarlak, Hamid; Ransley, Edward; Brown, Scott; Hann, Martyn; Netzband, Stefan; Wermbter, Malwin; López, Beatriz Méndez (Peer reviewed; Journal article, 2021)During the previous OC511 project, state-of-the-art mid-fidelity engineering tools for floating wind systems were found to consistently underpredict the nonlinear, low-frequency responses of semisubmersible offshore wind ...