Development of fragility curves of land‐based wind turbines with tuned mass dampers under cyclone and seismic loading

Abstract

Passive damping systems have been widely studied to improve the response of wind turbine structures under operational conditions. However, there is insufficient information on how these systems enhance reliability for extreme loads. Wind farm construction has been growing rapidly in recent decades, thereby moving wind turbine structures to sites with higher seismic and hurricane hazards. This research presents a numerical study performed on three land‐based wind turbines, similar to typical turbines installed in Mexican wind farms, under cyclone‐induced wind and earthquake action. The fictional location of the turbines is justified by the wind capacity distribution of Mexico, which is a country with high seismic and tropical cyclone risk. The wind field is simulated from semiempirical mean velocity models, and the ground motion records are obtained from real events recorded near the assumed site. All the time history analyses assume that the turbines are in parked condition. The results indicate that a fragility reduction of approximately 80% can be achieved under cyclone‐induced winds when passive damping systems are added to the structure, and that the fragility reduction is significantly less under seismic action.

Multi‐hazard fragility assessment of monopile offshore wind turbines under earthquake, wind and wave loads

“…48 Nevertheless, for simplicity, OWT is often considered as an overall lightly damped structure. Various damping ratios were adopted in recent studies, ranging from 1%, 9,42,[49][50][51] to 2%, 16,52 or 3% 7,10 of critical damping. There were also a few examples where the potential effect of aerodynamic damping was directly accounted for using the Rayleigh damping assumption, leading to high overall damping ratios such as 7.5%, 53 10%, 18 or even 12%.…”

“…The widely-used structure-specific S a (T 1 ) (such as in 7,10,20,33,34 ) was proven to have good efficiency. On the other hand, acceleration-related IMs, including the commonly used PGA (such as in 21,35,49 ), were found to have poor efficiency and proficiency. For wind, all four wind IMs were found to have poor efficiency, practicality and proficiency.…”

Anti‐tropical cyclone yaw control of wind turbines based on knowledge learning and expert system

“…However, the anti‐TC optimal control scheme of nEWSP has not been deeply studied on the wind field characteristics and its influence. The main difficulty is that in the face of complex and changeable working conditions such as strong winds, severe turbulence, and sudden changes in wind direction during TCs, the wind turbine needs to frequently perform various control actions such as speed limit [18], pitch change [19], yaw [15] and passive damping systems [20], to clarify the change law of wind turbine structural loads under complex environmental conditions, is an important basis for designing safe operation control schemes.…”

The impact of tropical cyclones on potential offshore wind farms

“…Previous studies have investigated the impact of tropical cyclone damage on onshore wind turbines from an engineering perspective. Martín del Campo et al Martín del Campo et al (2021) found that modifying the structure of onshore turbines by adding passive damping systems would reduce turbine fragility by 80%. Jaimes et al Jaimes et al (2020) employ a probabilistic risk assessment to explore the economic impact of tropical cyclones on onshore wind farms in Mexico.…”