Fundamental Resonance and Bifurcation of Large Generator End Winding When Its Clamping Plates Are Loose

HU Yu-da; QIU Jia-jun; TA Na

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Article Navigation > Applied Mathematics and Mechanics > 2005 > 26(4): 465-473

HU Yu-da, QIU Jia-jun, TA Na. Fundamental Resonance and Bifurcation of Large Generator End Winding When Its Clamping Plates Are Loose[J]. Applied Mathematics and Mechanics, 2005, 26(4): 465-473.

Citation:

HU Yu-da, QIU Jia-jun, TA Na. Fundamental Resonance and Bifurcation of Large Generator End Winding When Its Clamping Plates Are Loose[J]. Applied Mathematics and Mechanics, 2005, 26(4): 465-473.

Citation:

HU Yu-da, QIU Jia-jun, TA Na. Fundamental Resonance and Bifurcation of Large Generator End Winding When Its Clamping Plates Are Loose[J]. Applied Mathematics and Mechanics, 2005, 26(4): 465-473.

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Fundamental Resonance and Bifurcation of Large Generator End Winding When Its Clamping Plates Are Loose

1.
School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao 066004, P. R. China;

Received Date: 2003-01-19
Rev Recd Date: 2004-09-28
Publish Date: 2005-04-15

Abstract

Abstract

Vibration problems of a segment of winding between two clamping plates are studied when the clamping plates,which are used to fix stator end winding,are loose.First,magnetic induction expressions of the winding when the generator was running were given by using separation of variables method.Also,the expressions of the winding electromagnetic force and dry friction force between loosing clamping plates were gotten.Secondly,a mechanical model,which was used to study nonlinear vibration problem of the winding,was set up.Fundamental resonance was analyzed by using multiple scales method,and a resonance equation of amplitude and frequency in steady state was given. Then stability,bifurcation and singularity of the steady solution were studied.Criterions of stability and transition set of the bifurcation equation were obtained.At last,through numerical calculations, resonance curves were obtained.The results are helpful for analysis and protection of generator accidents.
- turbo-generator,
- end winding,
- electromagnetic force,
- fundamental resonance,
- bifurcation,
- multiple scales

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References(9)

References

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