文档介绍：ARTICLE1 IN PRESS
Journal of Wind Engineering
and Industrial Aerodynamics 96 (2008) 2217–2227
ate/jweia
A peak factor for non-Gaussian response analysis of
wind turbine tower
Luong Van Binha,Ã, Takeshi Ishiharab, Pham Van Phuca,
Yozo Fujinoa
aDepartment of Civil Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
bInstitute of Engineering, Innovation School of Engineering, The University of Tokyo, 2-11-16, Yayoi,
Bunnkyo-ku, Tokyo 113-8656, Japan
Available online 28 March 2008
Abstract
Equivalent static wind load evaluation formulas considering the dynamic effects based on peak
factor were proposed to estimate the design wind load on the wind turbine tower plex terrain.
The non-linear part of wind pressure was considered to estimate the mean wind loads. The peak
factor based on a non-Gaussian assumption was derived to estimate the non-linearity of wind load,
especially in the high turbulence intensity. The formula of the peak factor is simplified to a function
of the third order moment (skewness) considering the spatial correlation of wind velocity, the
resonance response and the background response. The proposed methods showed favorable
agreements with dynamic wind response analysis by FEM.
r 2008 Elsevier Ltd. All rights reserved.
Keywords: Wind turbine tower; Non-Gaussian response; Peak factor; Skewness; Spatial correlation; Resonance
1. Introduction
Wind load on wind turbine is usually evaluated either by finite element model (FEM) or by
equivalent static method. While FEM simulation monly used in turbine design,
equivalent static method is used widely in design of lower and other support structures.
Equivalent static method is adopted in many design codes (mendations for loads on
ÃCorresponding author. Tel.: +81 3 5841 1145; fax: +81 3 5841 1147.
E-mail address: ******@- (. Binh).
0167-6105/$ - see front matter r 2008 Elsevier Ltd. All rights reserved.
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