| 摘要 |
PROBLEM TO BE SOLVED: To evaluate in detail the degradation of a member or a joint part from a change in characteristic frequency by artificially vibrating an object of inspection with inspection work so as to facilitate and save labor as to a soundness evaluation method for structures. SOLUTION: According to this soundness evaluation method for a structure, the structure is vibrated at a desired position by a vibration means, to measure its vibration waveform by a characteristic frequency measuring instrument, thereby finding the characteristic frequency of the structure. The variation, in the acquired relevant characteristic frequency from an existing characteristic frequency read from a storage, is found for each of vibration modes. The soundness of the structure is evaluated, so as to evaluate the range of variation for each of the vibration modes. COPYRIGHT: (C)2005,JPO&NCIPI
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