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Identification of a Crack in a Rotor System using a Model-based Wavelet Approach

Autor(en):
Medium: Fachartikel
Sprache(n): Englisch
Veröffentlicht in: Structural Health Monitoring, , n. 4, v. 2
Seite(n): 293-308
DOI: 10.1177/147592103039917
Abstrakt:

The dynamics and diagnostics of a cracked rotor have been gaining importance in recent years. Vibration monitoring during start-up or shut-down is as important as during steady-state operations to detect cracks especially for machines such as aircraft engines which start and stop quite frequently and run at high speeds. In the present study, a model-based method is proposed for the on-line identification of cracks in a rotor while it is passing through its flexural critical speed. The fault-induced change of the rotor system is taken into account by equivalent loads in the mathematical model. The equivalent loads are virtual forces and moments acting on the linear undamaged system to generate a dynamic behaviour identical to the measured one of the damaged system. The rotor has been modelled using FEM, while the crack is considered through local flexibility change. The crack has been identified for its depth and location on the shaft for different rotor accelerations. The nature and symptoms of the fault – crack – are further ascertained using the continuous wavelet transform.

Structurae kann Ihnen derzeit diese Veröffentlichung nicht im Volltext zur Verfügung stellen. Der Volltext ist beim Verlag erhältlich über die DOI: 10.1177/147592103039917.
  • Über diese
    Datenseite
  • Reference-ID
    10561474
  • Veröffentlicht am:
    11.02.2021
  • Geändert am:
    19.02.2021
 
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