Fragility analysis of steel and concrete wind turbine towers

Quilligan, Aidan; O’Connor, Alan; Pakrashi, Vikram

doi:10.1016/j.engstruct.2011.12.013

Cited by 139 publications

(83 citation statements)

References 75 publications

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“…A wind turbine tower of variable tubular cross section ( [18] is examined. The radius and the thickness of the tubular cross section vary linearly along the tower length according to the dimensions.…”

Section: Numerical Study On Wind Turbine Towermentioning

confidence: 99%

“…The radius and the thickness of the tubular cross section vary linearly along the tower length according to the dimensions. In order to take into account the inertial forces applied by the mechanical parts (nacelle, rotor and blades), an additional concentrated mass 403.22 top m tn [18] is added at the top of the tower. The tower is considered to be clamped at its base and is subjected to the seismic excitations of JMA(1995) and TABAS and to the time-dependent horizontal force ( ) N F t at its top due to the wind.…”

Section: Numerical Study On Wind Turbine Towermentioning

confidence: 99%

“…It is noted that ( ) V t is assumed to have a uniform spatial distribution over the actuator disc. ( ) bl c r is the chord of the blade profile varying along the blade length r, the distribution of which is obtained from [18], [12]. In order to evaluate ( ) N C r , the classical Blade Element Momentum theory [9] …”

Section: Numerical Study On Wind Turbine Towermentioning

confidence: 99%

See 2 more Smart Citations

Implementation of the Kdamper Concept to Wind Turbine Towers

Kapasakalis¹,

Sapountzakis²,

Antoniadis³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Section: Numerical Study On Wind Turbine Towermentioning

confidence: 99%

Section: Numerical Study On Wind Turbine Towermentioning

confidence: 99%

See 1 more Smart Citation

Implementation of the Kdamper Concept to Wind Turbine Towers

Kapasakalis¹,

Sapountzakis²,

Antoniadis³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…Some specific research has already been developed for onshore HAWT, considering the variability of ground motion intensity [30,31] and wind speed [32] separately, and for offshore HAWT under the combination of extreme wind and wave conditions [33]. Fragility is defined as the conditional probability of a damage measure (DM) attaining or exceeding a damage limit state for a given …”

Section: Fragility Curve Derivationmentioning

confidence: 99%

Some Results on the Vulnerability Assessment of HAWTs Subjected to Wind and Seismic Actions

et al. 2017

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Abstract:The spread of the wind energy industry has caused the construction of wind farms in areas prone to high seismic activity. Accordingly, the analysis of wind turbine loading associated with earthquakes is of crucial importance for an accurate assessment of their structural safety. Within this topic, this paper presents some preliminary results of a probabilistic framework intended to be used for the estimation of the probability of failure of Horizontal Axis Wind Turbine-supporting structures when subjected to the wind and seismic actions. In particular, the multi-hazard fragility curves of the wind turbine-supporting structure were calculated using Monte Carlo simulations. A decoupling approach consisting of aerodynamic analysis of the rigid rotor blade model and subsequent linear dynamic Finite Element analyses of the supporting structure, including aerodynamic damping, was used. The failure condition of the tower structure was estimated according to the stress design procedure proposed by EC3 for the buckling limit state assessment. Finally, the vulnerability assessment of HAWTs to wind and seismic actions was evaluated in terms of fragility curves describing the probability of failure of the supporting tower structure as a function of the Peak Ground Acceleration (PGA) for each parked and operational wind condition. In particular, the results highlight a probability of failure larger than 50% for high levels of seismic action (PGA greater than 0.7 g) combined with the rotor in parked condition (wind speed of 3 m/s) or in operational rated condition (wind speed of 11.4 m/s).

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“…A detailed analysis of the structural behavior of the tower is of great relevance as it can represent up to 30% of the total system cost [2].…”

Section: Introductionmentioning

confidence: 99%