Cycle Range Distributions for Gaussian Processes Exact and Approximative Results View Full Text


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Article Info

DATE

2004-03

AUTHORS

Georg Lindgren, K. Bertram Broberg

ABSTRACT

Wave cycles, i.e. pairs of local maxima and minima, play an important role in many engineering fields. Many cycle definitions are used for specific purposes, such as crest–trough cycles in wave studies in ocean engineering and rainflow cycles for fatigue life predicition in mechanical engineering. The simplest cycle, that of a pair of local maximum and the following local minimum is also of interest as a basis for the study of more complicated cycles. This paper presents and illustrates modern computational tools for the analysis of different cycle distributions for stationary Gaussian processes with general spectrum. It is shown that numerically exact but slow methods will produce distributions in almost complete agreement with simulated data, but also that approximate and quick methods work well in most cases. Of special interest is the dependence relation between the cycle average and the cycle range for the simple maximum–minimum cycle and its implication for the range distribution. It is observed that for a Gaussian process with rectangular box spectrum, these quantities are almost independent and that the range is not far from a Rayleigh distribution. It will also be shown that had there been a Gaussian process where exact independence hold then the range would have had an exact Rayleigh distribution. Unfortunately no such Gaussian process exists. More... »

PAGES

69

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10687-004-4729-3

DOI

http://dx.doi.org/10.1007/s10687-004-4729-3

DIMENSIONS

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