Blade and shaft crack detection using torsional vibration measurements part 1

Feasibility studies

Kenneth P. Maynard, Martin Wesley Trethewey

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    The primary goal of the development project was to demonstrate the feasibility of detecting changes in blade natural frequencies (such as those associated with a blade crack) on a turbine using non-contact, non-intrusive measurement methods. The approach was to set up a small experimental apparatus, develop a torsional vibration detection system, and maximize the dynamic range and the signal to noise ratio. The results of the testing and analysis clearly demonstrated the feasibility of using torsional vibration to detect the change in natural frequency of a blade due to a change in stiffness such as those associated with a blade crack.

    Original languageEnglish (US)
    Pages (from-to)9-15
    Number of pages7
    JournalNoise and Vibration Worldwide
    Volume31
    Issue number11
    DOIs
    StatePublished - Dec 1 2000

    Fingerprint

    Crack detection
    torsional vibration
    vibration measurement
    Vibration measurement
    blades
    Natural frequencies
    cracks
    Cracks
    Turbomachine blades
    Vibrations (mechanical)
    resonant frequencies
    Signal to noise ratio
    Turbines
    nonintrusive measurement
    Stiffness
    Testing
    turbines
    dynamic range
    stiffness
    signal to noise ratios

    All Science Journal Classification (ASJC) codes

    • Metals and Alloys
    • Acoustics and Ultrasonics

    Cite this

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    abstract = "The primary goal of the development project was to demonstrate the feasibility of detecting changes in blade natural frequencies (such as those associated with a blade crack) on a turbine using non-contact, non-intrusive measurement methods. The approach was to set up a small experimental apparatus, develop a torsional vibration detection system, and maximize the dynamic range and the signal to noise ratio. The results of the testing and analysis clearly demonstrated the feasibility of using torsional vibration to detect the change in natural frequency of a blade due to a change in stiffness such as those associated with a blade crack.",
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    Blade and shaft crack detection using torsional vibration measurements part 1 : Feasibility studies. / Maynard, Kenneth P.; Trethewey, Martin Wesley.

    In: Noise and Vibration Worldwide, Vol. 31, No. 11, 01.12.2000, p. 9-15.

    Research output: Contribution to journalArticle

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