Analytical formulations to assess the energy dissipated at the base of an offshore wind turbine jacket impacted by a ship

Pire, Timothée; Sourne, Hervé Le; Echeverry, Sara; Rigo, Philippe

doi:10.1016/j.marstruc.2018.02.002

Cited by 16 publications

(5 citation statements)

References 10 publications

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“…Ultimate load analysis was performed under aerodynamic imbalance conditions for an individual pitch angle of each reference wind speed using the GH-Bladed TM V4. 1 The ultimate loads (i.e., maximum force (F x_ipa , F y_ipa , F z_ipa ), and maximum moment (M xc , M yc , M zc ) were obtained through the ultimate load analysis. Using these results, resultant force and moment were calculated by Equations ( 3) and (4), respectively.…”

Section: Ultimate Load Analysis Under Aerodynamic Imbalancementioning

confidence: 99%

“…It has been a recent trend that the wind industry shifts to large offshore wind turbines, with the advantages of large-scale MW, high wind speeds, and installation area for sustainable energy production [1][2][3]. As wind turbines become larger, aerodynamic loads on the rotors account for a large share of the loads that offshore wind turbine structures must withstand.…”

Section: Introductionmentioning

confidence: 99%

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Allowable Pitch Angle of Aerodynamic Imbalance Due to Individual Pitch Movement for Ultimate Loads on Offshore Wind Turbine Using Artificial Neural Network

Kim¹,

Jung

Jang

et al. 2022

Applied Sciences

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This study aims to calculate the ultimate loads through integrated load analysis under aerodynamic imbalance by individual pitch movement of offshore wind turbines, and based on this, to identify the allowable region of the individual pitch angle of the blade. For this, 5 MW offshore wind turbines were modeled using GH-BladedTM based on jacket type substructure data of the NREL-5 MW generic model and Upwind reports. For integrated load analysis, wind speeds were selected: 11 m/s, 14 m/s, 17 m/s, 20 m/s, 22 m/s, and 24 m/s. Ultimate load analysis was performed through the fixed pitch control mode with the individual pitch angles at an interval of 2°, ranging from 0° to 30°. Analysis was performed for the collective pitch control under the same environmental conditions as IPC. Through the comparison of loads at hub for CPC and the individual pitch movement states calculated through integrated load analysis, we identified the allowable pitch angle region where the ultimate loads of the individual pitch movement conditions were less than those of the CPC conditions. Furthermore, pattern analysis was performed using the artificial neural network for numerical modeling of the allowable pitch angle region. The results confirmed a high success rate of over 99%. Based on these results, this study suggested a new model according to the wind speed for the allowable pitch angle region.

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Section: Ultimate Load Analysis Under Aerodynamic Imbalancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Allowable Pitch Angle of Aerodynamic Imbalance Due to Individual Pitch Movement for Ultimate Loads on Offshore Wind Turbine Using Artificial Neural Network

Kim¹,

Jung

Jang

et al. 2022

Applied Sciences

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“…Collaborative work by Biehl and Lehman [8] focused on the kinematic response analysis of offshore wind turbines equipped with monopile, tripod, and jacket foundations during vessel impact scenarios. Pire et al [9] undertook examinations of jacket foundations subsequent to vessel-wind turbine collisions, proffering correspondingly simplified methodologies for anti-collision analysis. Comprehensive studies by Song and Jiang [10,11] scrutinized the collision dynamics between a 4600-ton vessel and a 5 MW monopile offshore wind turbine, encompassing evaluations of parameters such as aerodynamic damping, impact velocity, mean wind speed, wind orientation, and bow rigidity, and their implications on collision response.…”

Section: Introductionmentioning

confidence: 99%

The Dynamic Response of a Floating Wind Turbine under Collision Load Considering the Coupling of Wind-Wave-Mooring Loads

Zong,

Liu,

Zhang

et al. 2023

JMSE

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As the number of offshore wind turbines continues to rise and their proximity to navigational routes decreases, the risk of collisions between passing vessels and wind turbines increases, thereby presenting serious threats to the safety of personnel and equipment. Given that collisions between floating wind turbines and vessels entail a complex interplay of wind, wave, and mooring loads, this study established a bidirectional fluid-structure coupling simulation methodology based on Star-CCM+ and ABAQUS. Under the combined influences of wind, wave, and mooring loads, the study investigated the dynamic response of floating wind turbines following bow and side impacts from vessels. Analyses were conducted on the structural damage and deformation of floating wind turbines, the transformation of energy during collision processes, and the resultant motion response of the turbines. A sensitivity analysis was performed on parameters such as collision speed, collision angle, wind speed, and wave height. The findings indicate that the amplitude of pitching and heaving motions of the turbine exceed those observed under conditions devoid of collision loads, with the amplitude of motion intensifying with an increase in these parameters. The turbine’s floating body absorbed a minimal amount of internal energy, leading to minor damage, with the stress generated predominantly localized in the collision area of the floating body. The impact of a side collision from vessels exerted a larger influence on the structural dynamic response of floating wind turbines. The analysis results indicate that even though the offshore wind turbine structure is not critically damaged by ship impact, the equipment inside may still fail to work due to the high value of acceleration induced by ship impact. The research outcomes can benefit the safety design of offshore wind turbines in engineering practice.

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“…In a very high cycle fatigue region for martensitic-bainitic hot rolled steel the main fatigue process is by corrosion [25] , this is a time-dependent mechanism. Although corrosion protection mechanism as cathodic protection or surface coating is applied on parts in contact with seawater, it can be damaged or wear by structure operation or external impacts [26] , to prevent it, the structure deformation mechanism has been analyzed in marine structures [27] , [28] , [29] , [30] . To minimize its effect on structure strength and corrosion protection, foamed metals can be used in marine structures due to its ability to absorb impact energy [31] .…”

Section: Introductionmentioning

confidence: 99%

Harbor and coastal structures: A review of mechanical fatigue under random wave loading

Jimenez-Martinez

2021

Heliyon

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Harbor and coastal structures are essential in maritime connections. Additionally, some offshore structures near the coast are important for supplying energy as a material or transforming the natural resources into energy, as in wind turbines. One of the main issues that needs to be overcome in terms of these structures is mechanical fatigue due to the loads of the structure by its function and waves, wind, the current seawater level, and ice. Structural design has to meet high target loads to ensure that structures can endure extreme marine conditions under the assumption of the probability of loads and based on marine conditions, can mask damage where component immersions are not available for inspection. In this work, the wave loads and fatigue damage under random processes are reviewed.

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Analytical formulations to assess the energy dissipated at the base of an offshore wind turbine jacket impacted by a ship

Cited by 16 publications

References 10 publications

Allowable Pitch Angle of Aerodynamic Imbalance Due to Individual Pitch Movement for Ultimate Loads on Offshore Wind Turbine Using Artificial Neural Network

Allowable Pitch Angle of Aerodynamic Imbalance Due to Individual Pitch Movement for Ultimate Loads on Offshore Wind Turbine Using Artificial Neural Network

The Dynamic Response of a Floating Wind Turbine under Collision Load Considering the Coupling of Wind-Wave-Mooring Loads

Harbor and coastal structures: A review of mechanical fatigue under random wave loading

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