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- 저자 : Dodani Renan de Morais (검색결과 1 건)
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Time and Frequency Domain Analysis of Wind Turbine Towers Under Spatially Correlated Wind Field
Dodani Renan de Morais,Lucas Carminatti Foschiera,Herbert Martins Gomes 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.6
This work proposes a methodology to evaluate the dynamic behavior of Wind Turbine Towers (WTT) taking into account the eff ects of wind on its structural components (tower, nacelle, and blades). A model to generate wind velocity signals that are correlated in time and space is adopted, following a usual von Kármán Power Spectral Density (PSD) which has parameters such as turbulence intensities and standard deviations of the wind speed fl uctuations in the three directions, velocity profi le with height, and decay coeffi cients of the coherence with the distance between the points of simulation. It is investigated whether the time domain (TD) or frequency domain (FD) analysis is adequate in terms of simulation time, accuracy and computational costs for the evaluation of RMS values of acceleration and displacement signals at specifi c points of the WTT as well as base reactions. In FD the direct integration of specifi c PSD (displacements, accelerations, etc.) is employed. Results for a typical simulation are investigated and compared in diff erent situations of wind speed and wind parameters for the simulation of the dynamic behavior of the WTT. The results present the importance of the spatial simulation of wind velocity correlation to account for important fi nal structural behavior.
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