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| Calculation Methods of Fatigue Damage Spectrum in Time Domain and Frequency Domain and Their Equivalence Verification |
| Received:August 10, 2021 Revised:September 18, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.10.009 |
| KeyWord:response spectrum fatigue damage spectrum time and frequency domain calculation equivalence |
| Author | Institution |
| GAO Bo |
Beijing Institute of Strength and Environment, Beijing , China |
| ZHANG Zhong |
Beijing Institute of Strength and Environment, Beijing , China |
| WANG Shuai |
Beijing Institute of Strength and Environment, Beijing , China |
| ZHONG Yuan |
Beijing Institute of Strength and Environment, Beijing , China |
| LI Hai-bo |
Beijing Institute of Strength and Environment, Beijing , China |
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| Abstract: |
| This paper aims to verify the equivalence of time domain calculation method and frequency domain calculation method of fatigue damage spectrum. The time domain method and frequency domain method of fatigue damage spectrum are compiled into MATLAB programs. Taking the acceleration power spectrum of typical load as an example, the acceleration time-histories are deduced. The fatigue damage spectrum is calculated by frequency domain and time domain method with the acceleration power spectrum and acceleration time-histories data respectively, and the fatigue damage spectrum curve is compared to verify the equivalence of time domain algorithm and frequency domain algorithm. In the low frequency part of fatigue damage spectrum, the fatigue damage obtained by time domain method is greater than that by frequency domain method; In the high frequency part, the curve results obtained by time domain algorithm and frequency domain algorithm are basically consistent. In conclusion, the time domain algorithm of fatigue damage spectrum is equivalent to the frequency domain algorithm. |
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