Improved tropical cyclone boundary layer model and its application in floating offshore wind turbine structural response analysis DOI
Lun He, Liqiang An, Ruixing Zhang

et al.

Journal of Renewable and Sustainable Energy, Journal Year: 2024, Volume and Issue: 16(6)

Published: Nov. 1, 2024

The accurate simulation of tropical cyclone (TC) wind fields is essential for analyzing structural responses, given the potential severe damage to infrastructure caused by TCs. An improved TC boundary layer mean field model proposed, building upon Kepert model, introducing a two-dimensional pressure that varies with height and radius, surface turbulent diffusivity influenced speed at lower boundary, roughness length affected waves spray. accuracy validated through comparisons observational data. Comparative analysis indicates overestimates tangential component. employed in more accurately simulates central difference within layer. Furthermore, incorporation sea better reflects physical phenomena further enhances model. responses floating offshore turbine (FOWT) situated eyewall region under emergency shutdown conditions are computed using both models separately. results indicate blade tip displacement, tower top platform translation, rotation (pitch yaw) overestimated In conclusion, represents structure, offering precise data assessing FOWT conditions.

Language: Английский

Inerter Connected Compliant Liquid Damper for Wind-Induced Vibration Response Control: H2 Optimization Using Kaimal Spectrum DOI
Anupam Das, Somya Ranjan Patro, Arnab Banerjee

et al.

Journal of Vibration Engineering & Technologies, Journal Year: 2025, Volume and Issue: 13(1)

Published: Jan. 1, 2025

Language: Английский

Citations

1
Vibration mitigation of offshore wind turbines using pre-stressed nonlinear energy sinks under multiple load combinations DOI

Jinyu Li,

Haoshuai Qiao, Peng Huang

et al.

Ocean Engineering, Journal Year: 2024, Volume and Issue: 313, P. 119553 - 119553

Published: Oct. 22, 2024

Language: Английский

Citations

1
A review of dampers for offshore wind turbines DOI
Hongsheng Zhang, Zhiwen Huang, Xin Jin

et al.

Ocean Engineering, Journal Year: 2024, Volume and Issue: 314, P. 119613 - 119613

Published: Nov. 15, 2024

Language: Английский

Citations

1
Passive Shunted Piezoelectric Systems for Vibration Control of Wind Turbine Towers: A Feasibility Study DOI Creative Commons
Maria-Styliani Daraki, Konstantinos Marakakis, Panagiotis Alevras

et al.

Energies, Journal Year: 2024, Volume and Issue: 17(10), P. 2420 - 2420

Published: May 17, 2024

Many countries have a variety of offshore and onshore wind turbines that face extreme aging challenges. Issues with harmful vibrations must be minimized are addressed in this paper. A new method turbine tower vibration control using piezoelectricity shunt circuits is proposed The passive shown to improve the tower’s structural performance under various environmental loads, like seismic excitations. To examine effectiveness suggested shunted piezoelectric system, simple surrogate finite element model considered, investigations at second eigenfrequency carried out. An alternative way modeling studied structure considered results demonstrate better performance. advantages setting up damping systems for decreasing vibrational loads boosting their stability resilience against events highlighted throughout work.

Language: Английский

Citations

0
A Study on the Amplification Effect and Optimum Control of the Intermediate Column–Lever Negative Stiffness Viscous Damper DOI Creative Commons
Qiang Zhou, Wen Pan, Xiang Lan

et al.

Applied Sciences, Journal Year: 2024, Volume and Issue: 14(17), P. 7627 - 7627

Published: Aug. 29, 2024

Currently, the energy dissipation efficiency of intermediate column dampers is extremely low, and traditional lever amplification damping systems occupy a large space in buildings. Aiming at solving these problems, this paper puts forward new column–lever negative stiffness viscous damper (CLNVD), which has characteristics small impact on building significant displacement. The CLNVD consists following four parts: damper, device, lever, column. This introduces displacement coefficient (fd) to assess CLNVD’s effect (fE) effect. expressions for fd fE are derived according geometric magnification effective factor. Moreover, impacts multiple factors including position, lever’s coefficient, bending line beam, stiffness, index, inter-story elaborated. analysis results reveal following: when located middle span, will be maximized, increase first then decrease as beam’s increases. Meanwhile, capability increases χ rises. When does not exist, there exists an optimum that maximizes fE. combination c index α satisfies specific relationship, reaches its largest value. loss VD within region proposed paper, achieve higher avoid providing stiffness. Subsequently, proposes optimization design method CLNVD. Finally, well effectiveness verified through examples. In case study, offers larger ratio under circumstance fortification earthquakes. Under rare earthquakes, Scheme 1 been decreased by half roughly. According above-mentioned results, provides brand-new approach designers seismic Furthermore, provide beneficial reference other devices equipped with dampers.

Language: Английский

Citations

0
Improved tropical cyclone boundary layer model and its application in floating offshore wind turbine structural response analysis DOI
Lun He, Liqiang An, Ruixing Zhang

et al.

Journal of Renewable and Sustainable Energy, Journal Year: 2024, Volume and Issue: 16(6)

Published: Nov. 1, 2024

The accurate simulation of tropical cyclone (TC) wind fields is essential for analyzing structural responses, given the potential severe damage to infrastructure caused by TCs. An improved TC boundary layer mean field model proposed, building upon Kepert model, introducing a two-dimensional pressure that varies with height and radius, surface turbulent diffusivity influenced speed at lower boundary, roughness length affected waves spray. accuracy validated through comparisons observational data. Comparative analysis indicates overestimates tangential component. employed in more accurately simulates central difference within layer. Furthermore, incorporation sea better reflects physical phenomena further enhances model. responses floating offshore turbine (FOWT) situated eyewall region under emergency shutdown conditions are computed using both models separately. results indicate blade tip displacement, tower top platform translation, rotation (pitch yaw) overestimated In conclusion, represents structure, offering precise data assessing FOWT conditions.

Language: Английский

Citations

0