Sweep excitation with order tracking: A new tactic for beam crack analysis
| Autor: | Dongdong Wei, Kesheng Wang, Ming J. Zuo, Mian Zhang |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Global system
Materials science Acoustics and Ultrasonics Mechanical Engineering Acoustics 02 engineering and technology Condensed Matter Physics 01 natural sciences Signal Vibration 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Harmonics 0103 physical sciences Constant frequency ComputingMethodologies_GENERAL 010301 acoustics Order tracking Excitation Beam (structure) |
| Zdroj: | Journal of Sound and Vibration. 420:129-141 |
| ISSN: | 0022-460X |
| Popis: | Crack detection in beams and beam-like structures is an important issue in industry and has attracted numerous investigations. A local crack leads to global system dynamics changes and produce non-linear vibration responses. Many researchers have studied these non-linearities for beam crack diagnosis. However, most reported methods are based on impact excitation and constant frequency excitation. Few studies have focused on crack detection through external sweep excitation which unleashes abundant dynamic characteristics of the system. Together with a signal resampling technique inspired by Computed Order Tracking, this paper utilize vibration responses under sweep excitations to diagnose crack status of beams. A data driven method for crack depth evaluation is proposed and window based harmonics extracting approaches are studied. The effectiveness of sweep excitation and the proposed method is experimentally validated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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