Variance of fatigue damage in stationary random loadings: comparison between time- and frequency-domain results
| Autor: | Roberto Tovo, Denis Benasciutti, Julian Marcell Enzveiler Marques |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Random loadings
Time-domain approach Frequency-domain approach Fatigue damage Variance of fatigue damage Stochastic process Variance of fatigue damage Monte Carlo method Bandwidth (signal processing) Spectral density Fatigue damage 02 engineering and technology Time-domain approach 021001 nanoscience & nanotechnology NO Frequency-domain approach Random loadings 020303 mechanical engineering & transports 0203 mechanical engineering Frequency domain Statistical physics Oscillator system 0210 nano-technology Earth-Surface Processes Mathematics |
| Popis: | In this paper, the variance of fatigue damage under stationary random loadings is investigated by means of different case studies (linear oscillator system, random process with ideal unimodal or bimodal power spectral density). Monte Carlo method is used to evaluate the variance of fatigue damage in time-domain and frequency-domain approach. The variance from simulations is compared with analytical methods (e.g. Mark and Crandall’s method, Bendat’s method and Low’s method). Furthermore, for each case study, the paper investigates the relationship between the variance of fatigue damage and the bandwidth parameters. The purpose is to provide a simple closed-form solution for the case of ideal unimodal power spectral density. The closed-form solution has been compared with Monte Carlo simulation in time-domain. The results show good agreement not only for narrow-band but also for wide-band process. |
| Databáze: | OpenAIRE |
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