Influence of the Number of Ground Motions on Fragility Analysis of 5 MW Wind Turbines Subjected to Aerodynamic and Seismic Loads Interaction

Chenyang Yuan, Yunfei Xie, Jing Li, Weifeng Bai and Haohao Li
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Chenyang Yuan: School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Yunfei Xie: School of Architecture, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Jing Li: Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China
Weifeng Bai: School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
Haohao Li: Henan Province Tobacco Company Luoyang Company, Luoyang 471012, China

Energies, 2022, vol. 15, issue 6, 1-18

Abstract: In this paper, the influence of the number of ground motions on fragility analysis of 5 MW wind turbines under the excitation of aerodynamic and seismic loads is investigated to acquire the sufficient number of records for reasonable fragility estimation. Two scenarios, parked and normal operation, were simulated with the number of actual recorded ground motions ranging from 2 to 48. The fragility function parameters are estimated by utilizing the method of multiple stripe analysis (MSA), and the relationship between the number of ground motions and estimated parameters for each scenario is discussed. In addition, the influence of the number of ground motions on the range of estimated parameters with a 95% confidence interval is also discussed. The simulation results show that there are significant differences between the two scenarios in terms of fragility analysis for 5 MW wind turbines with the interaction of wind and seismic loads, and the lesser number of earthquakes is needed for a normal operation scenario compared to the parked scenario when obtaining the same accuracy fragility estimation. Furthermore, the appropriate number of ground motions to accurately estimate the fragility parameters of 5 MW wind turbines for the two scenarios is presented herein, which is almost unaffected by different wind spectra.

Keywords: sensitive analysis; fragility analysis; wind turbines; aerodynamic and seismic load interaction; appropriate number of ground motions (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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