Analysis on Torsional Stresses in Turbo-Generator Shafts due to Two-Phase Short-Circuit Fault

Yu Jiong Gu; Jing Xu

doi:10.4028/www.scientific.net/AMM.397-400.427

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 397-400Analysis on Torsional Stresses in Turbo-Generator...

Analysis on Torsional Stresses in Turbo-Generator Shafts due to Two-Phase Short-Circuit Fault

Abstract:

Taking a 660MW turbine generator shaft system as a target system, the torsional stresses responses are calculated under two-phase short-circuit fault by the finite element (FE) method which can obtain torsional stresses in local areas accurately. The results show that torsional stresses threaten the safety of shafts appear at the first several cycles of the vibration. And the amplitude of stress in weak cross sections located between the low pressure cylinder and the generator is much greater. In addition, the proportion of torsional stresses frequency components in different sections is distinct. The results are helpful to improve the safety management level of the unit.

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Periodical:

Applied Mechanics and Materials (Volumes 397-400)

Pages:

427-430

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.397-400.427

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Online since:

September 2013

Authors:

Yu Jiong Gu, Jing Xu

Keywords:

Finite Element Method (FEM), Torsional Stress, Turbo-Generator Unit, Two-Phase Short-Circuit Fault

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References

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