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- W2035113488 abstract "In this study, a crack identification approach based on a finite element cracked model is presented to identify the location and depth ratios of a crack in rotor systems. A Bernoulli-Euler rotor carrying an auxiliary roving disc has been used to model the cracked rotor, in which the effect of a transverse open crack is modelled as a time-varying stiffness matrix. In order to predict the crack location in the rotor-disc-bearing system, the suggested approach utilises the variation of the normalized natural frequency curves versus the non-dimensional location of a roving disc which traverses along the rotor span. The merit of the suggested approach is to identify the location and sizes of a crack in a rotor by determining only the natural frequencies of the stationary rotor system. The first four natural frequencies are employed for the identification and localisation of a crack in the stationary rotor. Furthermore, this approach is not only efficient and practicable for high crack depth ratios but also for small crack depth ratios and for a crack close to or at the node of mode shapes, where natural frequencies are unaffected." @default.
- W2035113488 created "2016-06-24" @default.
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- W2035113488 date "2014-07-25" @default.
- W2035113488 modified "2023-09-23" @default.
- W2035113488 title "Detection of Cracks in Stationary Rotors via the Modal Frequency Changes Induced by a Roving Disc" @default.
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- W2035113488 doi "https://doi.org/10.1115/esda2014-20611" @default.
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