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  • Comparison of frequency-domain methods for a vibration-fatigue-life estimation [Elektronski vir]
    Slavič, Janko, 1978- ; Mršnik, Matjaž ; Boltežar, Miha
    Vibration fatigue analysis is a two part process. A structure model must be built, be it in a simulated or real environment, which enables the study of stress loads in material points. On the basis ... of those stress states, different methods are then used to asses fatigue life. Quite a few frequency domain methods exist, that can operate on obtained power spectral densities, to give the fatigue life estimate. The results differ among methods and thorough analysis must be made, before such methods can be applied with confidence. Comparison studies have already been made, but they compare different sets of methods on different data. Based on specifics of structural dynamics responses, a new approach to comparison has been devised. Different groups of spectra are aimed at evaluating the sensitivity of the frequency domain methods on different changes in spectra, such as changing the distance between modes or raising and lowering the level of background noise. The accuracy is also tested on some typical accelerated-vibration test spectra, often used in the automotive industry. To come as close as possible to real-world problems, stress data is measured in the form of electro-dynamic shaker vibration. Fatigue life estimates are compared based on the value of fatigue life given by more conventional approach in the time-domain. Conclusions show, that methods by Tovo and Benasciutti, Zhao and Baker and by Dirlik give good results.
    Vir: ICMFF10 [Elektronski vir] (Datoteka Paper 21B-7 (8 str.))
    Vrsta gradiva - prispevek na konferenci
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 12962331

vir: ICMFF10 [Elektronski vir] (Datoteka Paper 21B-7 (8 str.))

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