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Fakulteta za strojništvo, Ljubljana (FSLJ)
  • An improvement to the methods for estimating the statistical dependencies ofthe parameters of radom load state
    Klemenc, Jernej ; Fajdiga, Matija
    One of the biggest problems in the fatigue-life analysis of structures is predicting the parameters of the structure loading spectra under real operating conditions. If the loading spectrum is ... obtained from a load time series using a two-parametric rainflow counting method, then it is possible topresent the distribution of the corresponding load cycles in the two-dimensional space of the loading-spectrum parametersČ the amplitude and the mean of the load cycles. It is beneficial for the prediction of the load cycles if the distribution of load cycles is described by a continuous probability density function. We found in our previous studies that the different shapes of the multi-component probability density functions of load cycles can be modelled by a mixture of Gaussian functions if the parameters ofthe mixture are estimated using a maximum-likelihood method. One of the mainproblems connected with such an approach is the estimation of the number of components of the load-cycle distribution. This is usually done by a researcher, so the estimation is to a large extent subjective. In this paper, we will describe two methods for estimating the parameters of the mixture of Gaussian functions that almost eliminate the subjective influence of a researcher. The applicability of the two methods will be presented using examples of real load cases.
    Vir: International journal of fatigue. - ISSN 0142-1123 (Vol. 26, no. 2, 2004, str. 141-154)
    Vrsta gradiva - članek, sestavni del
    Leto - 2004
    Jezik - angleški
    COBISS.SI-ID - 6796059

    Povezava(-e):

    http://www.sciencedirect.com/science/journal/0142-1123

    DOI:10.1016/S0142-1123(03)00109-9

    Dostop do polnega teksta samo za člane



vir: International journal of fatigue. - ISSN 0142-1123 (Vol. 26, no. 2, 2004, str. 141-154)

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