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Forced vibration analysis of rotors with an open edge crack based on a continuous vibration theory

Ebrahimi, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s00419-017-1295-0
  3. Abstract:
  4. In this paper, the forced vibration of a cracked rotor with an open edge crack has been studied by a new continuous model for flexural vibration of cracked rotors proposed in Ebrahimi et al. (J Sound Vib 333:3522–3535, 2014). The cracked rotor behavior under the external excitation of gravity and unbalance forces is presented. Since the governing equation is linear, using the superposition principle the responses of the cracked rotor to the gravity and unbalance forces are calculated separately. Then, the total response is calculated by summing these two responses. Each of these two responses is found by using a modified Galerkin method. The effect of the crack in the presence of the gravity and unbalance forces on the time response, frequency spectrum, frequency response curve and orbit diagram of the rotor is analyzed. Results can be used for the crack identification of rotors. © 2017, Springer-Verlag GmbH Germany
  5. Keywords:
  6. Continuous model ; Gravity force ; Unbalance force ; Cracks ; Frequency response ; Galerkin methods ; Gravitation ; Continuous modeling ; Cracked rotor ; Forced vibration ; Gravity forces ; Unbalance forces ; Vibration analysis
  7. Source: Archive of Applied Mechanics ; Volume 87, Issue 11 , 2017 , Pages 1871-1889 ; 09391533 (ISSN)
  8. URL: https://link.springer.com/article/10.1007/s00419-017-1295-0