208 磁気力加振によるロータクラックの検出(計測2)(OS.02 : 計測・信号処理・異常診断)
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概要
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Dynamic characteristics of a cracked rotor with a periodic excitation force by electro-magnet are investigated. Due to the open-close mechanism of the crack, the equations of motion of a cracked rotor have linear and nonlinear parametric terms. When a periodic excitation force applied to the cracked rotor, various kinds of resonances, which are not observed in a symmetric rotor and an asymmetric rotor, occur due to the unique spring characteristics of a cracked rotor. We clarified characteristics of these resonances theoretically and experimentally. These results enable us to detect a crack on-line without stopping the system.
- 2001-08-03
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