Abstract
Bladed disks are structural components of various types of rotating machines. The presented computational method for calculating natural vibration characteristics is based on the cyclic symmetry of structures and is applied to the calculation of natural frequencies and mode shapes of the steam turbine bladed disk with the LSB 54″ blades. Blades of an advanced design are continuously coupled in the zone of a shroud and the tie-boss zone by the blades’ untwist caused by the action of centrifugal forces at the turbine rotation. The calculated value of the natural frequencies associated with the mode shapes with zero nodal diameters at turbine operational speed appears to be problematic compared to the measured ones. The originally created computational model of the bladed disk is suitable for the calculation of natural frequencies and mode shapes with arbitrary numbers of nodal diameters, zero nodal diameters apart. The paper deals with searching for the approach to the creation of a new model of the steam turbine bladed disk with blades with continuous binding that would improve the compliance of the natural frequencies associated with the mode shapes with zero nodal diameters with the measured ones.
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References
Petrov, E.P., Ewins, D.J.: Effects of damping and varying contact area at blade-disk joints in forced response analysis of bladed disk assemblies. J. Turbomach. 128(2), 403–410 (2006)
Laxalde, D., Thouverez, F., Lombard, J.-P.: Dynamical analysis of multi-stage cyclic structures. Mech. Res. Commun. 34(4), 379–384 (2007)
Olson, B. J., Shaw, S. W., Pierre, C.: Order-tuned vibration absorbers for cyclic rotating flexible structures. In: Proceedings of the 2005 ASME Design Engineering Technical Conferences, 20th Biennial Conference on Mechanical Vibration and Noise, paper No. DETC2005-84641, ASME, Long Beach, CA, USA (2005)
Hajžman, M., Byrtus, M., Zeman, V.: Blade vibration suppression using friction elements in shrouding. In: Proceedings of ASME 2011 International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), paper No. DETC2011-47523, ASME, Washington, DC, USA (2011)
Polach, P.: Calculation of natural vibration of linear undamped rotationally periodic structures. Eng. Mech. 15(2), 81–97 (2008)
Polach, P.: Optimal stiffness parameters of the turbine bladed disk computational model. In: Proceedings of ASME 2013 International Design Engineering Technical Conferences (IDETC) and Computers and Information in Engineering Conference (CIE), 25th Conference on Mechanical Vibration and Noise, paper No. DETC2013-12249, pp. V008T13A042, ASME, Portland, OR, USA (2013)
Leyzerovich, A.S.: Steam Turbines for Modern Fossil-Fuel Power Plants. CRC Press, Boca Raton, USA (2007)
Hlous, J., Misek, T. Kubin, Z., Mestanek, P.: Development of a new titanium 54″ LSB—static and dynamic assessment. In: Proceedings of ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, paper No. GT2015-43280, pp. V07BT32A025, ASME, Montréal, Canada (2015)
Prágerová, A.: Difference Equations. SNTL Publishing House, Prague, Czech Republic (1971) (in Czech)
Singh, M.: SAFE Diagram—A Dresser-Rand Evaluation Tool for Packeted Bladed Disc Assembly. Technology Report TP025, Dresser-Rand Company, USA (1984)
Acknowledgements
The paper has originated in the framework of institutional support for the long-time conception development of the research institution provided by the Ministry of Industry and Trade of the Czech Republic to Research and Testing Institute Plzen.
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Polach, P. (2023). Computational Model for the Calculation of Natural Vibration Characteristics of a Turbine Bladed Disk. In: Okada, M. (eds) Advances in Mechanism and Machine Science. IFToMM WC 2023. Mechanisms and Machine Science, vol 147. Springer, Cham. https://doi.org/10.1007/978-3-031-45705-0_81
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DOI: https://doi.org/10.1007/978-3-031-45705-0_81
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