| 講演要旨(和文) | | コンクリート構造物のための空中放射音波を用いた非接触による非破壊検査法に関する研究を行っている。円形供試体を用いて探査可能な欠陥の深さと大きさについて検討し、たわみ共振周波数が深さに比例し、平面規模に反比例することを明らかにした。 |
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| | 講演要旨(英文) | | We are researching about the non-destructive inspection method by non-contact acoustic method for a concrete structure. The detectable depth and the size of the defect are studied using the circular concrete test object. As a result, it became clear that the bending resonance frequency was proportional to the depth, and was inverse proportion to a plane scale. Moreover, the technique using oscillating energy ratio was examined as one of the defective investigation algorithms. |
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