• DocumentCode
    2240397
  • Title

    A dual time-frequency-feature investigation and diagnostics of a cracked de-laval rotor

  • Author

    Alugongo, Alfayo A.

  • Author_Institution
    Mech. Eng Dept., Vaal Univ. of Technol., Vanderbijlpark, South Africa
  • fYear
    2009
  • fDate
    23-25 Sept. 2009
  • Firstpage
    1
  • Lastpage
    7
  • Abstract
    In this paper, the transient vibration of a cracked Jeffcott rotor with a switching crack is simulated and time-frequency features extracted by Wigner-Ville distribution (WVD) and wavelet transform (WT). The system dynamics in various scenarios including stiffness variation, eccentricity, and the angle between eccentricity and crack opening direction are investigated. A possibility to diagnose a cracked rotor by the WVD and WT is explored and reported.
  • Keywords
    Wigner distribution; cracks; rotors; time-frequency analysis; vibrations; wavelet transforms; Wigner-Ville distribution; cracked Jeffcott rotor; cracked de-Laval rotor; dual time-frequency-feature investigation; switching crack; transient vibration; wavelet transform; Africa; Analytical models; Equations; Feature extraction; Numerical models; Shafts; Stability analysis; Time frequency analysis; Vibrations; Wavelet transforms; Crack; Time-frequency domain; de-laval rotor;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    AFRICON, 2009. AFRICON '09.
  • Conference_Location
    Nairobi
  • Print_ISBN
    978-1-4244-3918-8
  • Electronic_ISBN
    978-1-4244-3919-5
  • Type

    conf

  • DOI
    10.1109/AFRCON.2009.5308079
  • Filename
    5308079
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2240397