小波-傅立叶变换综合法的车桥耦合振动分析

A Synthetic Method of Wavelet Transform and Fourier Transform for Coupled Vibration between Bridge and Vehicles

将小波变换与傅立叶变换相结合,提出一种处理非平稳信号的新方法小波-傅立叶变换综合法。并用于分析不同车速下桥梁跨中挠度的动力响应曲线,得到完整的时频信息。分析结果表明了该小波-傅立叶变换综合法在非平稳信号时频分析领域有良好的应用效果。

In this paper, a new method called synthetic method of wavelet transform and Fourier transform is proposed. This method is used to analyze the dynamic response curve of bridge vibration in different vehicle speeds. Finally, the integrated time-frequency information is obtained. The paper proved the validity of the synthetic method of wavelet transform and Fourier transform in time-frequency analysis of non-stable signal.