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Vibrations of Rotating MachineryTorsional Vibration and Related Coupled Vibration

Vibrations of Rotating Machinery: Torsional Vibration and Related Coupled Vibration [Torsional vibrations are often problematic in transient responses when a rotor-bearing system starts up. The vibration is more predominant and unavoidable in geared rotor systems. Though torsional vibration poses long-term problems, new methods of rotor design have been established by employing the transfer matrix method, which are capable of calculating precisely the rotor vibrations according to the shaft configuration. However, several coupled vibration problems have arisen as rotors have become lighter and faster. This chapter reviews conventional technologies including analysis and measurement of torsional vibration. It also explains the latest topics on coupled torsional vibration between a shaft and blade and another coupling effect between torsional and bending shaft vibrations.] http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Vibrations of Rotating MachineryTorsional Vibration and Related Coupled Vibration

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Publisher
Springer Japan
Copyright
© Springer Japan KK, part of Springer Nature 2019
ISBN
978-4-431-55452-3
Pages
261 –299
DOI
10.1007/978-4-431-55453-0_9
Publisher site
See Chapter on Publisher Site

Abstract

[Torsional vibrations are often problematic in transient responses when a rotor-bearing system starts up. The vibration is more predominant and unavoidable in geared rotor systems. Though torsional vibration poses long-term problems, new methods of rotor design have been established by employing the transfer matrix method, which are capable of calculating precisely the rotor vibrations according to the shaft configuration. However, several coupled vibration problems have arisen as rotors have become lighter and faster. This chapter reviews conventional technologies including analysis and measurement of torsional vibration. It also explains the latest topics on coupled torsional vibration between a shaft and blade and another coupling effect between torsional and bending shaft vibrations.]

Published: Mar 18, 2020

Keywords: Torsional system modeling; Geared rotor; Turbine generator set; Natural frequency; Unbalance torque excitation; Blade–shaft-coupled model; Torsional vibration measurement; Blade modeling; Zero-nodal diameter mode; Bending–torsion coupling due to mass eccentricity; Stability analysis; Bending–torsion-coupled resonance

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