Critical Speed Analysis of a Single Stage Impulse Type High-Speed Steam Turbine Rotor Disc
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Abstract
Resonance is a common thread that runs through almost every branch of engineering. Yet, this phenomenon often goes unnoticed, silently resulting in inconveniences, such as causing a bridge to collapse or a helicopter to fl y apart, to name a few. It is, therefore, of utmost importance to avert resonance, for which determining the frequency of the system becomes indispensible. In complex rotating structures, as one considered in this paper, theoretical determination of frequency is as diffi cult and laborious as a task can be. Finite element analysis has proven to be an effective tool to handle such a task. Resonant vibrations incited by the running speed harmonic excitations, steam impinging frequency, engine order excitations are fundamental causes for failure of turbine components. The mainstream discipline that is encompassed by this paper is the modal analysis. Modal analysis is performed to estimate the critical speeds and study the mode shapes of the bladed rotor disc under prestressed condition.
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How to Cite
Gurudatt, B., Seetharamu, S., Sampathkumaran, P., & Krishna, V. (2012). Critical Speed Analysis of a Single Stage Impulse Type High-Speed Steam Turbine Rotor Disc. Power Research - A Journal of CPRI, 199–206. Retrieved from https://cprijournal.in/index.php/pr/article/view/383
References
- Donald Andrew Phillips. “Finite element analysis of a shaft-rotor system”, Virginia Polytechnic Institute and State University, January 23, 2001.
- Klaus Jurgen Bathe. “Finite element procedures,” Prentice Hall of India.
- Tirupathi R Chandrupatla. “Introduction to fi nite elements in engineering,” Prentice Hall of India Publications.
- ANSYS Help Documentation, ANSYS Inc.
- Mahadevan and Balaveer Reddy. “Design data hand book,” CSB Publishers and Distributors.
- Patil. H G. “Design data hand book,” I K International Publishing.
- John C Nicholas.“Operating turbo machinery at or near the second critical speed in accordance with API Specifi cations,” Rotor Bearing Dynamics Inc. NY, USA: Wellsville.
- Markus Jocker, Alexandros kessar and Torsten H. Fransson. “Comparison of models to predict low engine order excitations in a high pressure turbine stage”, Kungliga Teknisha Hogskolan (KTH), S-10044, Stockholm, Swedan.
- Murali P Singh, John J. Vargo, Donald M. Schiffer and james D-dello. “SAFE diagram – a design and reliability tool for turbine blading”, Dresser-Rand, Wellsville, NY, USA.
- J.S.Rao, “Turbomachine Blade Vibration”, John Wiley and Sons, New Delhi, India, 1991.