Multi-objective optimization of a negative stiffness vibration control system for offshore wind turbines

Kapasakalis, K.A.; Gkikakis, A.E.; Sapountzakis, E.J.; Chatzi, E.N.; Kampitsis, A.E.

doi:10.1016/j.oceaneng.2024.117631

Cited by 8 publications

(1 citation statement)

References 46 publications

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“…They also studied the impact of the tower shadow effect and wind shear on blade flutter. Various studies have been implemented for applying different vibration control techniques of offshore wind turbines [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Passive Shunted Piezoelectric Systems for Vibration Control of Wind Turbine Towers: A Feasibility Study

Daraki,

Marakakis,

Alevras

et al. 2024

Energies

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

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Section: Introductionmentioning

confidence: 99%

Passive Shunted Piezoelectric Systems for Vibration Control of Wind Turbine Towers: A Feasibility Study

Daraki,

Marakakis,

Alevras

et al. 2024

Energies

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Concise analytical solutions to negative‐stiffness inerter‐based DVAs for seismic and wind hazards considering multi‐target responses

Su,

Chen,

Zeng

et al. 2024

Earthq Engng Struct Dyn

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Practical engineering structures are subjected to hazardous seismic‐ and wind‐ induced vibrations during their lifetime. They should be designed based on capacity and serviceability targets. Similarly, the design of dynamic vibration absorbers (DVAs) should also meet multiple requirements. However, most current analytical approaches are based on a single‐target response and may lead to cumbersome expressions for complicated scenarios. To address these issues, concise solutions to negative‐stiffness inerter‐based DVAs are proposed in this paper. Firstly, a generic analytical optimization approach for H‐norm solutions considering different response targets of displacement, velocity, acceleration, and transmissibility, is established. Subsequently, the concise solutions are derived based on Taylor's expansion of these analytical solutions by ignoring higher‐order items of the equivalent mass ratio. Finally, the application scope and effectiveness of the proposed concise solutions are discussed. Consequently, the resulting concise solutions are proved to be located close to the pareto fronts of multi‐target optimization results. They have shown superior performances than conventional solutions in controlling the structural capacity and serviceability indicators of a practical five‐story steel frame case under dynamic wind and seismic hazards. Conclusively, the proposed concise solutions are simple in expression and reveal excellent multi‐target performances, which can provide guidance and insights for the optimal design of DVAs.

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Experimental testing and numerical validation of the Εxtended KDamper: A negative stiffness-based vibration absorber

Mantakas,

Kalderon,

Chondrogiannis

et al. 2024

Engineering Structures

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Multi-objective optimization of a negative stiffness vibration control system for offshore wind turbines

Cited by 8 publications

References 46 publications

Passive Shunted Piezoelectric Systems for Vibration Control of Wind Turbine Towers: A Feasibility Study

Passive Shunted Piezoelectric Systems for Vibration Control of Wind Turbine Towers: A Feasibility Study

Concise analytical solutions to negative‐stiffness inerter‐based DVAs for seismic and wind hazards considering multi‐target responses

Experimental testing and numerical validation of the Εxtended KDamper: A negative stiffness-based vibration absorber

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