325 振動特性計測による構造物欠陥同定に関する実験的一考察(モード解析と応用関連技術2)(OS.16 : モード解析と応用関連技術)

概要

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In recent years, various methods using vibration characteristics are proposed for detecting damage in structures. Almost of these techniques use vibration characteristics in low frequency range, lower natural frequencies, lower mode shapes and so on. However, vibration characteristics in low frequency range are considered to be insensitive to miner change of structure. So we have question about effectiveness of these techniques. In this paper we performed experiments to investigate the influence of miner change of structure on vibration characteristics in low and high frequency range. As a result, dynamical characteristics in low frequency range are insensitive to miner change of structure, so that it is not suitable for detecting damage. On the contrary, dynamical characteristics in high frequency range are sensitive to miner change of structure. It is suitable for detecting damage.
一般社団法人日本機械学会の論文
2001-08-03