Inplementation of Cepstrum Analysis for Cable Force Analysis of Cable-Stayed Bridge
Cable-stayed bridge cable force testing is a routine testing item for super major bridges,and it is widely and frequently used.The current common detection method is the frequency method.In the process of cable-stayed bridge cable force detection,the fundamental frequency of the cable is often coupled with the fundamental frequency of the tower,resulting in unsatisfactory acquisition of signals,which results in low accuracy and inaccurate calculation of bridge cable force.When analyzing unsatisfac-tory cable samples abroad,multiple sampling or artificial vibration methods are usually used to obtain images with better period-icity.The operation is cumbersome and the accuracy is low,and the application value is not high.Therefore,in this study,the cepstrum analysis method is used to post-process the collected signals for the problem of unsatisfactory sampling signals.Convert the sidebands in the complex spectrogram into a single curve,and successfully separate signals coupled with different frequencies.Through the analysis and verification of an example of Wuhan Erqi Yangtze River Bridge,the inspection accuracy of the cable force detection method meets the actual engineering application conditions,and the method is simple and fast,and has high practical application value.
Cable-Stayed BridgeCable Force DetectionCepstrumSignal ProcessingMatlab
NETL
NSTL
万方数据
