连续、离散小波变换的桥梁健康检测方法研究

The research method on bridge health detection based on continuous and discrete wavelet transform

选取竖向位移模态和曲率模态,分别采用连续小波变换和离散小波变换对其进行损伤检测。数值模拟结果表明:当采用连续小波变换时,基于竖向位移的小波变换并不能准确确定损伤位置,而基于曲率的小波变换可以准确确定结构损伤位置;当采用离散小波变换时,基于曲率和竖向位移的小波变换都可以准确确定结构损伤位置。

The vertical displacement and curvature are selected in this paper,using continuous wavelet transform and discrete wavelet transform to detect the damage respectively. The numerical simulation results indicates that when continuous wavelet transform is being used,the wavelet transform based on curvature can exactly determine the location of the damage and on vertical displacement can＇t; when discrete wavelet transform is being used,the wavelet transform based on vertical displacement and curvature can both determine the location of the damage.