期刊
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
卷 101, 期 -, 页码 43-52出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jweia.2011.12.005
关键词
Cable supported bridges; Transient aeroelastic vibration; Nonlinearity; Frequency modulated empirical mode decomposition (FM-EMD)
Instantaneous modal parameters are effective indicators of nonlinearity in an aeroelastic system. The Identification of them requires reliable algorithms. A frequency modulated empirical mode decomposition (FM-EMD) method is proposed in this paper to track the variations in the modal parameters of a multi-DOF bridge-air system. The proposed method is a lifted version of the traditional EMD method. It overcomes one of the major shortcomings of its traditional version, i.e. the inability to separate closely spaced modes. Numerical verification was provided to show the effectiveness of the FM-EMD method. Wind tunnel testing data of a partially streamlined box girder sectional model of a suspension bridge was processed subsequently with the proposed method. Instantaneous frequencies and damping ratios of the aeroelastic system during the free decay vibration were realized. Nonlinearity in the transient aeroelastic vibration was identified. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据