Seismic Analysis of Onshore Wind Turbine Including Soil-Structure Interaction Effects

Taddei, Francesca; Meskouris, Konstantin

doi:10.1007/978-3-658-02810-7_43

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…The findings obtained therein verified the sensitivity of the turbine's tower dynamic characteristics in the SSI phenomena (i.e., reduction in tower's natural frequencies). Furthermore, the seismic analysis, based on the time domain approach with the use of artificial accelerograms, showed an almost perfect agreement in the response results associated with either the simplified, spring‐based substitute model for the SSI or the more accurate BEM (boundary elements method) model, implemented also by Taddei & Meskouris …”

Section: Seismic Evaluation Of Wind Turbines Based On Numerical Simulmentioning

confidence: 73%

“…Furthermore, the seismic analysis, based on the time domain approach with the use of artificial accelerograms, showed an almost perfect agreement in the response results associated with either the simplified, spring-based substitute model for the SSI or the more accurate BEM (boundary elements method) model, implemented also by Taddei & Meskouris. 130 Besides the SSI-induced shift of the natural frequencies, the soil flexibility was also found of high relevance for the seismic response of wind turbines. Based on Alati et al 75 investigation, maxima demands in terms of bending moments at the blade root were found highly increasing with soil compliance, while the latter has been additionally verified in case of offshore platforms subjected to environmental-induced dynamic loading (i.e., wind, currents and waves, 131 ).…”

Section: Soil-structure Interaction Effects and Other Special Considementioning

confidence: 99%

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Wind turbines and seismic hazard: a state-of-the-art review

2016

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Wind energy is a rapidly growing field of renewable energy and as such, intensive scientific and societal interest has been already attracted. Research on wind turbine structures has been mostly focused on the structural analysis, design and/or assessment of wind turbines mainly against normal (environmental) exposures while, so far, only marginal attention has been spent on considering extreme natural hazards that threat the reliability of the lifetime-oriented wind turbine's performance. Especially, recent installations of numerous wind turbines in earthquake prone areas worldwide (e.g., China, USA, India, Southern Europe and East Asia) highlight the necessity for thorough consideration of the seismic implications on these energy harnessing systems. Along these lines, this state-of-the-art paper presents a comparative survey of the published research relevant to the seismic analysis, design and assessment of wind turbines. Based on numerical simulation, either deterministic or probabilistic approaches are reviewed, since they have been adopted to investigate the sensitivity of wind turbines' structural capacity and reliability in earthquake-induced loading. The relevance of seismic hazard for wind turbines is further enlightened by available experimental studies, being also comprehensively reported through this paper. The main contribution of the study presented herein is to identify the key factors for wind turbines' seismic performance while important milestones for ongoing and future advancement are emphasized.

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Section: Seismic Evaluation Of Wind Turbines Based On Numerical Simulmentioning

confidence: 73%

Section: Soil-structure Interaction Effects and Other Special Considementioning

confidence: 99%

Wind turbines and seismic hazard: a state-of-the-art review

2016

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“…The results indicated that in strong earthquake regions, the wind turbine design, especially the tubular tower section, can be controlled by the combined action of the earthquake and wind load. Based on a simplified soil spring model and Boundary Element Method, Taddei et al [14] established a simplified finite element model of wind turbine towers and adopted a spectrum-compatible synthetic acceleration method to evaluate the applicability of the simplified soil representation in the practical seismic design. The results showed that with increasing thickness of the soil layer, their natural frequencies decrease, and the simplified soil spring model could have better agreement with more sophisticated and accurate soil models.…”

Section: Figure 1 Typical Wind Turbine Lattice Tower and Wind Turbinementioning

confidence: 99%

Dynamic Response Analysis of Wind Turbine Tubular Towers Under Long-Period Ground Motions With the Consideration of Soil-Structure Interaction

2018

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Existing research in the seismic response of wind turbine tubular towers subjected to long-period ground motions is lacking, especially when soil-structure interaction (SSI) is considered. This paper discusses the seismic performance of typical pitch-controlled 1.25MW wind turbine systems, with particular focus on the influences of SSI effect and ground-motion characteristics. Modal analysis and resonance analysis are carried out first, ensuring that resonance does not occur when the tower is in operation. Two long-period waves and a bedrock wave are selected from the worldwide earthquake record database, followed by detailed dynamic time history analysis. The results indicate that the maximum displacement, acceleration, stress level and internal force responses of the tower subjected to the long-period ground motions are significantly larger than the corresponding values induced by the bedrock wave. Some responses can be further amplified due to the SSI effect, and this highlights the importance of incorporating the SSI effect into seismic design of wind turbine towers, especially for those located in soft soil regions. Furthermore, neglecting the vertical seismic action could lead to unsafe design. Other important issues, including the risk of pounding, stress concentration near the door regions, spindle shear fracture, and foundation failure, are also discussed, and summarized as references or comments for design and analysis of such structures.

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“…In 2013, Taddei and Meskouris [13] estimated the seismic response of a soil-turbine system and involved a 1.5-MW, 3-blade wind turbine, grounded on a layered half space. The wind turbine system was modeled by means of Finite Element Method (FEM).…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of A Full Scale Wind Turbine Tower Under Seismic Loading

Anen¹,

Ghada²,

Mahmoud³

2016

Fifth International Conference on Advances in Civil, Structural and Mechanical Engineering -ACSM 2016

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This paper presents the dynamic investigation of an existing wind turbine tower. Both experimental and numerical analyses were performed to assess the structural response of the tower under seismic load. Field ambient vibration test was applied to identify the actual dynamic properties experimentally. A vibration based finite element model was built in ANSYS to conduct the seismic response analysis. The tower shown to survive moderate earthquakes as it is located in Zafarana wind farm in Egypt, a zone lies by the red sea known for its historical seismic activity.

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Seismic Analysis of Onshore Wind Turbine Including Soil-Structure Interaction Effects

Cited by 7 publications

References 4 publications

Wind turbines and seismic hazard: a state-of-the-art review

Wind turbines and seismic hazard: a state-of-the-art review

Dynamic Response Analysis of Wind Turbine Tubular Towers Under Long-Period Ground Motions With the Consideration of Soil-Structure Interaction

Dynamic Behavior of A Full Scale Wind Turbine Tower Under Seismic Loading

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