Study on the Coupled Bending and Torsional Vibrations of Turbo-Generator Unit with Rub-Impact

Cheng Bing He; Shi Chao Wang

doi:10.4028/www.scientific.net/AMM.246-247.1273

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 246-247Study on the Coupled Bending and Torsional...

Study on the Coupled Bending and Torsional Vibrations of Turbo-Generator Unit with Rub-Impact

Abstract:

An increment transfer matrix equations based on step-by-step integration method and traditional transfer matrix method are deduced Combined with multi-mass model and Riccati method, the increment transfer matrix method is put forward, that can be directly used to analyze the dynamic response of the coupled bending and torsional vibrations of turbo-generator shafts with rub-impact. Taking a turbo-generator unit as example, the vibration character of rub-impact fault is analyzed when unit starts up. The research results show that rubbing will make vibration amplitude increase when the rotational speed is lower than the first critical speed; however, when the speed is higher than the first critical speed, rubbing will make the rotor mass unbalance reduce, thereby vibration amplitude will reduce slightly.

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Periodical:

Applied Mechanics and Materials (Volumes 246-247)

Pages:

1273-1277

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.246-247.1273

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Online since:

December 2012

Authors:

Cheng Bing He, Shi Chao Wang

Keywords:

Coupled Bending, Increment Transfer Matrix Method, Rub-Impact Fault, Torsional Vibration, Turbo-Generator Unit

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References

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