期刊
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
卷 104, 期 -, 页码 227-238出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jweia.2012.03.027
关键词
Alongwind response; Fatigue damage; Uncertain parameters
Literature dealing with the calculation of fatigue damage under wind loads is rich in procedures in the time domain or in the frequency probabilistic domain, whose parameters are usually assigned according to deterministic values. Starting from an advanced model of alongwind-induced fatigue damage and using a probabilistic assessment of the parameters involved, this study discusses and propagates the uncertainties inherent in the input parameters over the fatigue damage prediction. The use of Taylor series is particularly simple and expressive. It shows that errors in parameter estimates give rise to very large scatter in the fatigue damage assessment, pointing out a set of quantities whose role is crucial for a reliable estimate. Because of large uncertainties and strong non-linearity of the problem, the actual distribution of the fatigue damage is then obtained by Monte Carlo simulations. The results are discussed and compared with conventional verifications, based on deterministic evaluations with standard safety coefficients. (C) 2012 Elsevier Ltd. All rights reserved.
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