Estimation of Gear Dynamic Excitation for Gearbox Prognostics

L. Gelman, V. Giurgiutiu, A. Bayoumi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The dynamic excitation generated in gears influences the gearbox fatigue life and durability. The current methodology, "duty cycle", of predicting gear fatigue life is based solely on running hours and transmitted mean load is considered insufficient in correctly defining how much of the gearbox fatigue life has actually been expanded. The problem to be address is to investigate dynamic mean excitation to be used in predicting the gearbox fatigue life. A generic theoretical statistical analysis was developed to investigate the ratio of the dynamic mean excitation to the transmitted mean load of a spur gear. Innovative methodology for the estimation of this ratio was carried out. It was shown for gear with profile modification that the dynamic mean excitation can be more than, less than, or equal to the transmitted mean load, depending on the time-varying mesh stiffness, static transmission error, cross-correlation between these functions, and transmitted mean load. Numerical examples were discussed.

Original languageEnglish
Title of host publicationProceedings of the Third European Workshop
Subtitle of host publicationStructural Health Monitoring 2006
EditorsAlfredo Güemes
Place of PublicationLancaster
PublisherDEStech Publications Inc.
Number of pages9
ISBN (Print)1932078630, 9781932078633
Publication statusPublished - 2006
Externally publishedYes
Event3rd European Workshop on Structural Health Monitoring - Granada, Spain
Duration: 5 Jul 20067 Jul 2006
Conference number: 3


Conference3rd European Workshop on Structural Health Monitoring


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