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分析了用声阻的“等效圆板”新概念对粘结层、蜂窝结构声阻探伤时所出现的异常指示,并辅以激励频率的改变,即可区分小凹坑与脱粘。
The new indication of the acoustic impedance of the adhesive layer and the honeycomb structure with the new concept of “equivalent circular plate” of acoustic resistance is analyzed, supplemented by the change of the excitation frequency to distinguish the small pits and the debonding .