Ocean Engineering, Journal Year: 2024, Volume and Issue: 319, P. 120190 - 120190
Published: Dec. 31, 2024
Language: Английский
Applied Sciences, Journal Year: 2025, Volume and Issue: 15(2), P. 519 - 519
Published: Jan. 8, 2025
In this study, a composite control algorithm based on classical methods is developed to achieve all objectives, such as power production, load reduction, and motion for the floating wind turbine. previous studies, peak shaving nacelle feedback were used together reduce both platform tower-base loads of turbines. The new approach presented in study not only addresses tower but also aims mitigate rotor speed fluctuations blade by additionally introducing feedforward individual pitch control. This expansion enhances applicability performance algorithms. To this, parametric simulations conducted using OpenFAST assess effects parameter variations each technique. simulation results showed that proposed significantly reduced fluctuations, loads, compared with baseline controller.
Language: Английский
Citations
1
Ocean Engineering, Journal Year: 2024, Volume and Issue: 297, P. 117168 - 117168
Published: Feb. 19, 2024
This study investigates an optimized design approach for a passive-adaptive pendulum-tuned mass damper (PTMD). The PTMD is used to mitigate structural vibrations in offshore wind turbines (OWTs) with flexible monopile foundations considering Pile-Soil Interaction (PSI). model OWT based on the 5-MW proposed by National Renewable Energy Laboratory (NREL). PSI incorporates pile that modeled as beam–column elements supported nonlinear springs and accounts lateral loads (p-y curves) axial (t-z Q-z at nodal points. Wind wave spectra estimation, well hydrodynamic aerodynamic load analysis, are performed using bespoke MATLAB® program operated conjunction ANSYS® 3-D finite element global model. resultant peak response hub was evaluated through power spectral density (PSD) analysis. Optimal choices parameters obtained via parametric which assesses dynamic along across directions stress tower base. A systematic representation considers uncertainties stemming from geometric mechanical properties of tower, environmental loads, rotating blade dynamics. To address these uncertainties, Monte Carlo simulation employed assess risk Performance-Based Engineering (PBWE) framework. Consequently, probabilistic evaluation response, foundation stresses, production assists optimal process PTMDs OWTs.
Language: Английский
Citations
7
Ocean Engineering, Journal Year: 2024, Volume and Issue: 305, P. 117912 - 117912
Published: April 23, 2024
Offshore wind turbines (OWTs) are dynamically sensitive structures to low-frequency wind-wave loadings due their low damping and high flexibility. This makes them vulnerable unwanted vibrations in ocean environments. Therefore, there is a need implement innovative vibration control devices suppress undesired ensure structural safety. A tuned mass damper (TMD) has been promising solution excessive recently OWTs higher efficiency installation cost. However, TMD performance mitigation of when placed at nacelle still challenging investigate because the generator torque pitch may affect dynamics overall system. In this paper, an optimal multiple system designed by placing TMDs locations along tower, which defined using maximum amplitude displacements for first three natural frequencies tower. addition, extensive simulations carried out with integrated OWT-TMD systems find ratio values quantity TMDs. The also several scenarios, including operating, parked, idling conditions under combined loadings. numerical model 5 MW NREL OWT developed OpenFAST considered as baseline study. results show root mean square (RMS) response reduction 10.2% 42% fore-aft (FA) side-side (SS) tower displacement optimally Moreover, improved effects on base moment RMS 43.6% 20.8% observed orthogonal directions, respectively. findings paper have potential designing passive reductions OWT.
Language: Английский
Citations
7
Renewable Energy, Journal Year: 2024, Volume and Issue: 237, P. 121793 - 121793
Published: Nov. 2, 2024
Language: Английский
Citations
4
Reliability Engineering & System Safety, Journal Year: 2025, Volume and Issue: unknown, P. 110863 - 110863
Published: Jan. 1, 2025
Language: Английский
Citations
0
Ocean Engineering, Journal Year: 2025, Volume and Issue: 324, P. 120609 - 120609
Published: Feb. 18, 2025
Language: Английский
Citations
0
Lecture notes in civil engineering, Journal Year: 2025, Volume and Issue: unknown, P. 11 - 21
Published: Jan. 1, 2025
Language: Английский
Citations
0
Structural Control and Health Monitoring, Journal Year: 2025, Volume and Issue: 2025(1)
Published: Jan. 1, 2025
The increasing scale and capacity of wind turbines, driven by advancements in power technology, present significant challenges managing fatigue loads vibrations. To address these challenges, we have designed an eddy current tuned rolling cylinder damper (ECTRCD) which incorporates current–induced damping into the traditional (TRCD) optimised parameters including radius ratio, mass frequency ratio ratio. optimal is observed between 0.9 1, with around 0.05 ration 1/6. On contrary, performance improves as increases. Additionally, reduction equivalent load 17.7% ECTRCD (a 1/6, a 1.2%, 0.943 0.059). Compared TRCD, enhancement this value modest, only 1% improvement. Nevertheless, displacement at tower top side‐to‐side direction significantly mitigated, particularly under high speeds. This finding underscores potential promising alternative to conventional TRCDs, offering enhanced improved structural stability.
Language: Английский
Citations
0
Energy, Journal Year: 2025, Volume and Issue: unknown, P. 135963 - 135963
Published: April 1, 2025
Language: Английский
Citations
0
Ocean Engineering, Journal Year: 2025, Volume and Issue: 329, P. 121133 - 121133
Published: April 8, 2025
Language: Английский
Citations
0