Analysis on Torsional Vibration Characteristics of Steam Turbine Generator Shafts

Abstract:

This article introduced the four-terminal network method, Riccati transfer matrix method and finite element method respectively, and the applications of three methods in inherent characteristics analysis of turbine generator units’ torsional vibration. Considering an actual case of 600 MW units in one power, the natural frequencies and normal vibration mode of units’ torsional vibration were worked out through the three methods, and compared with the testing natural frequencies, the results showed that the calculation precisions of three methods are very high, and the three methods can be used to analyze actual units. Comparatively, the results obtained by four-terminal network method are closer to testing natural frequencies with a higher calculation precision.

• Periodical: Advanced Materials Research (Volume 298)
• Pages: 267-272
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.298.267
• Online since: July 2011
• Authors: Tian Xiao Wang, Cheng Bing He, Di Jiang
• Keywords: Finite Element Model (FEM), Four-Terminal Network Method, Riccati Transfer Matrix Method, Torsional Vibration, Turbine-Generator Unit

References

[1] Gu Yujiong, Yang Kun and He Chengbing: Simulations on torsional vibration characteristics of turbogenerators based on fou-terminal network method. China Mechanical Engineering, 1999, 10(5): 540-542.

[2] He Chengbing, Gu Yujiong and Li Zengzhi: The improvement of torsional vibration model-four terminal network model of turbo-generator set. Turbine technology, 2002, 44(4): 213-215.

[3] He Chengbing, Xing Cheng and Shen Jian: An increment transfer matrix method for the torsional vibration response of steam turbo-generator shaft system. Applied Mechanics and Materials, 2010, 34-35: 1082-1087.

DOI: 10.4028/www.scientific.net/amm.34-35.1082

[4] Jiang Dongxiang, Hong Liangyou and Huang Qian: Shaft crack analysis and diagnosis for the 600 MW steam turbine generator. Key Engineering Materials, 2009, 834(413/414): 591-598.

DOI: 10.4028/www.scientific.net/kem.413-414.591

[5] J. -S. WU and C. -H. CHEN: Torsional vibration analysis of gear-branched systems by finite element method. Journal of Sound and Vibration, 2001, 240(1): 159-182.

DOI: 10.1006/jsvi.2000.3197