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Formulation of a Direct Spectral Method for Counting of Cycles for Bi-Modal Stress History

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Abstract:

Vibrations of engineering structures are described usually by functions variable in time domain (displacements, stress). For real structures modes of vibrations existing in response of structure due to external excitation are determined by exciting frequency and the natural frequencies of the structure. In the paper, the general idea of method of stress cycle counting, based on the FFT analysis of the stress function response is discussed and compared with the rain-flow cycle counting method, for the case of bi-modal spectrum.

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Periodical:

Solid State Phenomena (Volume 224)

Pages:

69-74

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.224.69

Citation:

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Online since:

November 2014

Authors:

Marek Stanislaw Kozien*, Dariusz Smolarski

Keywords:

Cycle Counting, Fatigue Analysis, Spectral Analysis

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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