Based on the wavelet transformation and the theory of modal acousticemission, the dispersion of guided wave propagated in thin plate was investigated by acousticemission experiment.
基于小波变换和模态声发射理论，通过模态声发射试验的方法确定了管道中导波传播的频散特性。
2
The experiments also showed that the effect of thermal cracking on wave velocity is related closely with that on acousticemission discovered by other authors.
实验同时表明岩石热开裂的波速效应，与过去被其他作者发现的热开裂声发射效应之间有着密切的关系。
3
Three experimental techniques for detecting matrix cracking evolution in composite laminates are investigated: acousticemission detection, ultrasonic wave C-scan, and replica tape record.