介绍了接触电位差法固定探头式无损探伤装置的结构，工作原理，测量电路及其频率特性。
The structure, working principle, measuring circuit and frequency characteristics of contact potential difference nondestructive testing equipment using fixed probe am intro - duced.
本文比较详细地介绍了基于模态理论的无损探伤方法，即频率法、能量法、柔度矩阵法等。
In the paper, some non-destructive methods based on mode theory such as frequency method, energy method and matrix method are introduced.
由此阐明了金属胶接蜂窝结构面板上小凹坑处声阻探伤“异常指示”的原因，以及改变激励频率有可能辨别是否脱粘的理论依据。
Whereupon the reason of "abnormal indication" in All of small pits on the surface of metal honeycomb adhesive bonded structure and the theoretical basis for the probable distinguishing of debonded ar…
由此阐明了金属胶接蜂窝结构面板上小凹坑处声阻探伤“异常指示”的原因，以及改变激励频率有可能辨别是否脱粘的理论依据。
Whereupon the reason of "abnormal indication" in All of small pits on the surface of metal honeycomb adhesive bonded structure and the theoretical basis for the probable distinguishing of debonded ar…
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