Research on Non Destructive Identification Technology of Impact Echo Spectral Characteristics of Defects in Prefabricated Reinforced Composite Plates
Aiming at the problems of low non-destructive identification rate and inaccurate identification of defect parameters in identifying defects in reinforced composite panels using infrared imaging and ultrasonic technology,a non-destructive identification technology based on the pre fabricated impact echo spectrum characteristics of reinforced composite panel defects is proposed.Analyze the linear relationship between the diameter of the impact hammer and the impact response,and optimize the propagation path and frequency characteristics of the shock wave signal by combining the structural parameters of the composite plate.Based on the optimization results,the time-domain and frequency-domain characteristics of the shock echo signal were received and analyzed in depth.By optimizing the time-frequency feature recognition algorithm,the interference components in the frequency domain were effectively reduced.By using wavelet technology to decompose the optimized time-frequency characteristics,the specific impact of bonding quality on spectral images and energy features was revealed.The results show that the proposed non-destructive identification technology has a recognition rate of over 90%for defects in prefabricated reinforced composite panels,with a maximum of 96.2%,demonstrating excellent recognition efficiency.The research results can provide powerful technical references for non-destructive testing of defects in prefabricated reinforced composite panel components.
impact echo methodnon destructive identification of defectsreinforced laminated platetime frequency domain characteristicswavelet decomposition
万方数据
维普
