Identification of the critical crack depths and locations of rotordynamic systems in backward whirl

M. A. Al-Shudeifat, Eric Butcher

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The effect of crack depth of a rotor-bearing-disk system on vibration amplitudes is investigated. Two models of the crack, which are the breathing and the open crack models, are considered. Finite element models and general harmonic balance solutions are derived with either breathing or open cracks which are valid for damped and undamped rotor systems. It is found via waterfall diagrams of the system with a breathing crack and slight unbalance that there are critical pairs of crack depth and frequency of large vibration amplitudes at the backward whirling frequencies. These high vibration amplitudes at the backward whirl appear at earlier crack depths than those at the forward whirl for both crack models. Resonance peaks at the second, third and fourth sub-harmonic frequencies emerge as the crack depth increases. It is shown that the orbit changes can be used as an indication of breathing crack propagation in the shaft. In addition, the veering in the critical frequencies has been clearly noticed in the open crack case.

Original languageEnglish (US)
Title of host publicationStructural Health Monitoring 2009: From System Integration to Autonomous Systems - Proceedings of the 7th International Workshop on Structural Health Monitoring, IWSHM 2009
PublisherDEStech Publications
Pages683-690
Number of pages8
Volume1
ISBN (Print)9781605950075
StatePublished - 2009
Externally publishedYes
Event7th International Workshop on Structural Health Monitoring: From System Integration to Autonomous Systems, IWSHM 2009 - Stanford, United States
Duration: Sep 9 2009Sep 11 2009

Other

Other7th International Workshop on Structural Health Monitoring: From System Integration to Autonomous Systems, IWSHM 2009
CountryUnited States
CityStanford
Period9/9/099/11/09

ASJC Scopus subject areas

  • Health Information Management
  • Computer Science Applications

Fingerprint Dive into the research topics of 'Identification of the critical crack depths and locations of rotordynamic systems in backward whirl'. Together they form a unique fingerprint.

  • Cite this

    Al-Shudeifat, M. A., & Butcher, E. (2009). Identification of the critical crack depths and locations of rotordynamic systems in backward whirl. In Structural Health Monitoring 2009: From System Integration to Autonomous Systems - Proceedings of the 7th International Workshop on Structural Health Monitoring, IWSHM 2009 (Vol. 1, pp. 683-690). DEStech Publications.