Multi-span Beam Damage Detection Method Based on Time Frequency Coherence Function
A damage detection method based on the time frequency coherence function is proposed to address the continuous wavelet-based damage detection methods distorted by border and constrain distortion.With the proposed method,the damage detection on muti-span beam is realized based on time frequency coherence function,which can significantly reduce the distortion of damage detection caused by border and constrain and upgrade dasmage positioning accuracy.The results of numerical investigation and experimental verification on beam show that the proposed method can effectively eliminate the effect of border and constrain due to continuous wavelet transform,accurately position multi-span damage even under noise interference.
damage detectiontime frequency coherence functioncontinuous wavelet transform