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- W2034545128 abstract "As the power to weight ratio demand on rotordynamic systems increases, susceptibility to transverse fatigue cracking of the shaft increases as well. The ability to detect cracks in an early stage of progression is imperative for minimizing off-line repair time. A vibration monitoring system proposed prior is developed herein, employing the 2X harmonic response component of the rotor tilt as a signature indicating a transverse shaft crack. To effectively capture the 2X response, the crack model must include the local nature of the crack, the depth of the crack, and the stiffness asymmetry inducing the gravity-forced 2X harmonic response. The transfer matrix technique is well-suited to incorporate these crack attributes due to its modular nature. Two transfer matrix models are proposed to predict the 2X harmonic response. The first model applies local crack flexibility coefficients determined using the strain energy release rate, while the second incorporates the crack as a rectangular notch to emulate a manufactured crack used in the experiments. Analytic results are then compared to experimental measurement of the rotor tilt gleaned from an overhung rotor test rig originally designed to test seal face dynamics. The test rig is discussed, and experimental 2X harmonic amplitudes of the rotor tilt are provided for shafts containing manufactured cracks of depths between zero and 40 percent." @default.
- W2034545128 created "2016-06-24" @default.
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- W2034545128 date "2012-10-07" @default.
- W2034545128 modified "2023-09-24" @default.
- W2034545128 title "Crack Detection in a Rotor Dynamic System by Vibration Monitoring: Analysis and Experimental Results" @default.
- W2034545128 doi "https://doi.org/10.1115/ijtc2012-61076" @default.
- W2034545128 hasPublicationYear "2012" @default.
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