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作者:

Wang, Xianqiang (Wang, Xianqiang.) | Liu, Duo (Liu, Duo.) | Zhang, Jiandong (Zhang, Jiandong.) | Jiao, Yubo (Jiao, Yubo.)

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摘要:

In order to accurately simulate structural fatigue crack damage, the non-linear contact model was selected and verified to be suitable for the fatigue crack simulation in cantilever beam. The influence of damage severity and location on harmonic vibration responses were revealed. Moreover, the damage identification indexes based on harmonic excitation response were constructed, and the effectiveness used to identify fatigue crack damage was validated. The results reveal that contact model is effective in simulating fatigue crack and sensitive to nonlinear fatigue crack through the comparative analysis of harmonic vibration response of intact structure and damaged one. For the vibration responses of beam with different damage severities and locations, the greater the damage severity is, and the closer the damage location is to the fixed end, the more obvious the non-linear vibration characteristics presents. Two damage indicators including distortion value of phase spectrum () and proportion of super/sub-harmonic amplitudes (Dd) are applied, which can effectively characterize the change of fatigue crack with different damage location and severity. Furthermore, contact model presents stronger non-linear information compared with bilinear model, which is more suitable for fatigue damage simulation. © 2022 Xianqiang Wang, et al.

关键词:

End effectors Harmonic analysis Cantilever beams Nanocantilevers Fatigue damage Damage detection Fatigue crack propagation Location Cracks Vibration analysis

作者机构:

  • [ 1 ] [Wang, Xianqiang]The State Key Laboratory on Safety and Health of In-Service Long-Span Bridges, Institute of Transportation Science, JSTI Group, Nanjing; 211112, China
  • [ 2 ] [Wang, Xianqiang]School of Civil Engineering, Southeast University, Nanjing; 211189, China
  • [ 3 ] [Liu, Duo]The State Key Laboratory on Safety and Health of In-Service Long-Span Bridges, Institute of Transportation Science, JSTI Group, Nanjing; 211112, China
  • [ 4 ] [Zhang, Jiandong]The State Key Laboratory on Safety and Health of In-Service Long-Span Bridges, Institute of Transportation Science, JSTI Group, Nanjing; 211112, China
  • [ 5 ] [Jiao, Yubo]Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology, Beijing; 100124, China

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来源 :

Journal of Vibroengineering

ISSN: 1392-8716

年份: 2022

期: 3

卷: 24

页码: 435-452

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JCR@2022

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JCR@2022

ESI学科: ENGINEERING;

ESI高被引阀值:49

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