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Dynamic Response and Time-Frequency Analysis for Gear Tooth Crack Detection
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Operation, Maintenance and Acoustics.
2016 (English)In: Mechanical systems and signal processing, ISSN 0888-3270, E-ISSN 1096-1216, Vol. 66-67, p. 612-624Article in journal (Refereed) Published
Abstract [en]

Vibration health monitoring is a non-destructive technique which can be applied to detect cracks propagating in gear teeth. This paper studies gear tooth crack detection by investigating the natural frequencies and by performing time-frequency analysis of a 6 DOF dynamic gear model. The gear mesh stiffness used in the model was calculated analytically for different cases of crack sizes. The frequency response functions (FRFs) of the model were derived for healthy and faulty cases and dynamic simulation was performed to obtain the time signal responses. A new approach involving a short-time Fourier transform (STFT) was applied where a fast Fourier transform (FFT) was calculated for successive blocks with different sizes corresponding to the time segments of the varying gear mesh stiffness. The relationship between the different crack sizes and the mesh-stiffness-dependent eigenfrequencies was studied in order to detect the tooth crack and to estimate its size.

Place, publisher, year, edition, pages
2016. Vol. 66-67, p. 612-624
National Category
Other Civil Engineering
Research subject
Operation and Maintenance
Identifiers
URN: urn:nbn:se:ltu:diva-8682DOI: 10.1016/j.ymssp.2015.05.015ISI: 000362861700041Scopus ID: 2-s2.0-84946475247Local ID: 7390dea9-d1ec-447d-bc09-1b4e165ff859OAI: oai:DiVA.org:ltu-8682DiVA, id: diva2:981620
Note
Validerad; 2015; Nivå 2; 20150104 (omamoh)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Mohammed, Omar D.Rantatalo, Matti

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