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Damage detection method of long-span bridge cable structure based on wavelet packet analysis

In order to improve the effectiveness of damage detection of long-span bridge cable structure, a damage detection method of long-span bridge cable structure based on wavelet packet analysis is proposed. After clarifying the causes and types of cable structure damage, the damage location of cable structure is determined by wavelet packet analysis method. The main content is to construct the extended two-scale equation of wavelet packet based on scale vector and wavelet vector, so as to obtain the damage location detection function of cable structure. After the damage location detection, the damage degree detection of cable structure is completed by using the classification principle of support vector machine. The experimental results show that compared with the traditional detection methods, this method can detect the damage position and degree of cable structure more accurately.