Abstract
This paper presents theoretical analysis of non-synchronous vibration in rotor systems. A finite element method on the basis of the Timoshenko beam formulation implemented in the in-house code is applied as a standard tool to perform transient rotordynamic analysis using the Newmark algorithm for the direct numerical integration of the equations of motion. The analysis is demonstrated for a free power turbine rotor system of a small-size turboprop engine. Different sources of non-synchronous excitation are studied including squeeze film damper and rotor-to-stator contact interaction.
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References
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Acknowledgments
The presented work has been funded by the European Commission within the FP7 project “Efficient Systems and Propulsion for Small Aircraft—ESPOSA”, contract No. ACP1-GA-2011-284859-ESPOSA.
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Pugachev, A.O., Sheremetyev, A.V., Tykhomirov, V.V., Shpilenko, O.I. (2015). Finite Element Modeling and Vibration Analysis of a Free Power Turbine Subjected to Non-synchronous Excitation. In: Pennacchi, P. (eds) Proceedings of the 9th IFToMM International Conference on Rotor Dynamics. Mechanisms and Machine Science, vol 21. Springer, Cham. https://doi.org/10.1007/978-3-319-06590-8_155
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DOI: https://doi.org/10.1007/978-3-319-06590-8_155
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