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Date of Publication:2010-01-01

Journal:太阳能学报

Issue:8

Page Number:1042-1048

ISSN No.:0254-0096

Abstract:The random response of wind turbine and the calculation method of extreme wind-induced response in design period were studied by random vibration theory. The wind-induced response was decomposed into a mean wind-induced response component and a fluctuating wind-induced response component. The random buffeting wind-induced responses of blade and tower were calculated by pseudo excitation method (PEM), and accordingly the mathematical expectation of extreme random buffeting responses can be obtained. The extreme mean wind-induced response calculated by wind shear effect. The results show that the extreme buffeting wind-induced responses calculated in frequency domain can effectively avoid complex process that the extreme responses are calculated by multi-samples of wind velocity time series in time domain, and the method is more accurate. Based on the PEM, the modal coupling effect can be included automatically, and it is an accurate algorithm in theory.

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