Optimization design of tuned mass damper for vibration suppression of a barge-type offshore floating wind turbine

He, Enhui; Hu, Yaqi; Zhang, Yang

doi:10.1177/1475090216642466

Cited by 29 publications

(28 citation statements)

References 25 publications

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“…Previous research conducted by Adam and Furtmüller pointed out that a range of mass ratios of 2% to 8% are considered to be the practically applicable range for structural control . In addition, He et al concluded that the suppression rates of the vibration response for OWTs vary according to the TMD mass from 0.5% to 2% of the entire mass (tower‐RNA structure). Si et al evaluated the effectiveness of a TMD at reducing damage equivalent loads for a spar type OWT, with a TMD that accounts for 3.3% of the entire mass.…”

Section: Modeling Of Tmds In Fastv8mentioning

confidence: 99%

An investigation on the impacts of passive and semiactive structural control on a fixed bottom and a floating offshore wind turbine

et al. 2019

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The application of structural control to offshore wind turbines (OWTs) using tuned mass dampers (TMDs) has shown to be effective in reducing the system loads. The parameters of a magnetorheological (MR) damper modeled by the Bouc‐Wen model are modified to utilize it as a damping device of the TMD. Rather than showcasing the intricate design policy, this research focuses on the availability of the MR damper model on TMDs and its significance on structural control. The impact of passive and semiactive (S‐A) TMDs applied to both fixed bottom and floating OWTs is evaluated under the fatigue limit state (FLS) and the ultimate limit state (ULS). Different S‐A control logics based on the ground hook (GH) control policy are implemented, and the frequency response of each algorithm is investigated. It is shown that the performance of each algorithm varies according to the load conditions such as a normal operation and an extreme case. Fully coupled time domain simulations are conducted through a newly developed simulation tool, integrated into FASTv8. Compared with the passive TMD, it is shown that the S‐A TMD results in higher load reductions with smaller strokes under both the FLS and the ULS conditions. The S‐A TMD using displacement‐based GH control is capable of reducing the fore‐aft and side‐to‐side damage equivalent loads for the monopile by approximately 12% and 64%, respectively. The ultimate loadings at the tower base for the floating substructure are reduced by 9% with the S‐A TMD followed by inverse velocity‐based GH control (IVB‐GH).

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Section: Modeling Of Tmds In Fastv8mentioning

confidence: 99%

An investigation on the impacts of passive and semiactive structural control on a fixed bottom and a floating offshore wind turbine

et al. 2019

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“…Similar numerical and experimental studies for FOWTs with the spar-type platforms have been proposed and carried out throughout the year [13][14][15]. Another possible candidate for the FOWT support platform is the distributed-buoyancy stabilization (barge) [16][17][18]. It achieves excellent stability with a high-water plane area, and its mooring system is primarily for station keeping and not for supplying the system stiffness.…”

Section: Introductionmentioning

confidence: 98%

Design Optimization and Coupled Dynamics Analysis of an Offshore Wind Turbine with a Single Swivel Connected Tether

Chen

2020

Energies

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The increased interest in renewable wind energy has stimulated many offshore wind turbine concepts. This paper presents a design optimization and a coupled dynamics analysis of a platform with a single tether anchored to the seabed supported for a 5 MW baseline wind turbine. The design is based on a concept named SWAY. We conduct a parametric optimization process that accounts for important design considerations in the static and dynamic view, such as the stability, natural frequency, performance requirements, and cost feasibility. Through these optimization processes, we obtain and present the optimized model. We then establish the fully coupled aero-hydro-servo-elastic model by the time-domain simulation tool FAST (Fatigue, Aerodynamics, Structures, and Turbulence) with the hydrodynamic coefficients from an indoor program HydroGen. We conduct extensive time-domain simulations with various wind and wave conditions to explore the effects of wind speed and wave significant height on the dynamic performance of the optimized SWAY model in various water depths. The swivel connection between the platform and tether is the most special design for the SWAY model. Thus, we compare the performance of models with different tether connection designs, based on the platform motions, nacelle velocity, nacelle accelerations, resonant behaviors, and the damping of the coupled systems. The results of these comparisons demonstrate the advantage of the optimized SWAY model with the swivel connection. From these analyses, we prove that the optimized SWAY model is a good candidate for deep water deployment.

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“…Usually, the structural stabilization systems are either mounted on or embedded inside the main structure. This type of Tuned Mass Dampers (TMD) are designed to mechanically damp the vibration either passively, actively or even semi-actively [14][15][16][17]. The efficiency of these systems is associated with their mass, stiffness and damping coefficient.…”

Section: Introductionmentioning

confidence: 99%

Design, assessment and evaluation of structural stabilization system for weather buoys using a moving foil

2020

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This paper proposes a novel, simple and high-efficient submerged structural stabilization system for a self-stabilizing buoy that provides a stable platform for oceanographic and meteorological sensors. The proposed stabilization system is a Seesaw-like Tuned Mass Damper (STMD) combined with a foil and is designed in a way to harvest the activation energy from incoming waves. A fixed rudder in the rear underside of the buoy, as well as physical properties of the buoy, help to keep its balance in yaw and roll directions while encountering lateral waves. Therefore, the orientational stabilization of the whole structure is achieved by controlling only the pitch deviation. The proposed model is then simulated in a marine dynamic analysis software. Two different shapes of a thin rod and a foil were proposed for the sliding mass (slider) of the STMD and their performances are investigated and compared to each other in two different modes of passive and active control. In the passive mode, different mass ratios were conducted for the thin rod-shaped slider (i.e., a ratio of the effective mass of the stabilizing system to that of the whole structure) and a mass ratio of 8% could suppress the pitch deviation up to 81.3% in the resonance condition. The same STMD system with a mass ratio of 2% suppresses the pitch deviation by only 7%. In the active mode, the STMD with a thin rod-shaped slider and a mass ratio of 8% exhibits only 49.1% suppression effect in a multiwave condition. However, by changing the shape of the slider to a foil while controlling its angle of attack (AOA) mechanically, the system with the mass ratios of 2% and 8% could suppress the pitch deviation of the buoy up to 69.4% and 79.1%, respectively.

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Optimization design of tuned mass damper for vibration suppression of a barge-type offshore floating wind turbine

Cited by 29 publications

References 25 publications

An investigation on the impacts of passive and semiactive structural control on a fixed bottom and a floating offshore wind turbine

An investigation on the impacts of passive and semiactive structural control on a fixed bottom and a floating offshore wind turbine

Design Optimization and Coupled Dynamics Analysis of an Offshore Wind Turbine with a Single Swivel Connected Tether

Design, assessment and evaluation of structural stabilization system for weather buoys using a moving foil

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