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| Study on Accelerated Vibration Fatigue Testing of Structures |
| Received:August 02, 2016 Revised:September 06, 2016 |
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| DOI：10.7643/ issn.1672-9242.2016.05.005 |
| KeyWord:Non-Gaussian Random Vibration Vibration Fatigue Accelerated Testing |
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| Abstract: |
| Objective To develop a new technology of accelerated vibration fatigue test to assess the long-term durability and fatigue reliability of engineering structures under random vibration environment. Methods Various factors that affect the structural vibration fatigue life were systematically studied by Gaussian/non-Gaussian random vibration fatigue tests, including root mean squares, power spectral density, power spectral bandwidth and kurtosis of acceleration excitation. Results The test results showed that the kurtosis value and the bandwidth of non-Gaussian random vibration excitation also have a significant impact on the structural vibration fatigue life. Conclusion If the structural vibration excitation shows obvious Non-Gaussianity, the kurtosis value and the bandwidth must be considered for the quantitative design of random vibration fatigue accelerated testing. |
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