Rotor resonance avoidance by continuous adjustment of support stiffness
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2024-05-15
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Mcode
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Language
en
Pages
12
Series
International Journal of Mechanical Sciences, Volume 270
Abstract
This paper presents a method to reduce lateral vibration amplitudes in large rotating machines. The method is based on avoiding resonances by altering the natural frequencies of the rotor system at each rotating speed during operation. While many research papers have considered altering support stiffness during crossing critical speeds, continuous adjustment methods have received less attention. Continuous on-line adjustment of the natural frequencies of a rotor system is possible to a large range by adjusting the support stiffness of the bearing housings. The optimal foundation stiffness tuning policy can be defined utilizing a rotordynamic model or experimental measurements, effectively creating a resonance-free operating speed region, where vibrations are drastically reduced. It is shown through full-scale experimental laboratory tests, that the subcritical and supercritical response of the rotor system is significantly decreased during run-up and run-down with the optimal foundation stiffness tuning strategy. The developed method can be applied to reduce vibrations in any rotating machinery, where a variable foundation stiffness control can be installed. Moreover, this on-line foundation stiffness tuning strategy could also be applied in combination with resonance crossing methods involving stiffness manipulation.Description
Publisher Copyright: © 2024 The Authors
Keywords
Foundation stiffness, Rolling element bearing, Rotor dynamics, Rotor-bearing system, Variable stiffness, Vibration control
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Citation
Laine, S, Haikonen, S, Tiainen, T & Viitala, R 2024, ' Rotor resonance avoidance by continuous adjustment of support stiffness ', International Journal of Mechanical Sciences, vol. 270, 109092 . https://doi.org/10.1016/j.ijmecsci.2024.109092