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| Research on Unintentional Unscrewing of Screw Joints Under Vibration Condition |
| Zhao Dengfeng;Ceng Guoying |
| Southwest University of Science and technology Sichuan 621000 |
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Abstract By numerical simulation and experimental, the dynamic response characteristics of unintentional unscrewing of threaded connection under vibration condition was researched. Features values of joints failure early-warning was found out. Firstly, qualitative analysis of the unintentional unscrewing process was preceded. Subsequently, a simplified dynamic model of the screw joint was built and verified. Finally, by analysis of experimental data, the THD was put forward as a better early-warning indicator. The results showed that the THD was a better early-warning indicator whether sinusoidal excitation or frequency bandlimited random excitation
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Received: 22 June 2009
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2010, Vol. 29 
