Effect of Coupled Torsional and Transverse Vibrations of the Marine Propulsion Shaft System

Akile Neşe Halilbeşe; Cong Zhang; Osman Azmi Özsoysal

doi:10.1007/s11804-021-00205-2

Effect of Coupled Torsional and Transverse Vibrations of the Marine Propulsion Shaft System

Akile Neşe Halilbeşe^*, Cong Zhang, Osman Azmi Özsoysal

^*Corresponding author for this work

Department of Naval Architecture and Marine Engineering

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

In this study, the coupled torsional–transverse vibration of a propeller shaft system owing to the misalignment caused by the shaft rotation was investigated. The proposed numerical model is based on the modified version of the Jeffcott rotor model. The equation of motion describing the harmonic vibrations of the system was obtained using the Euler–Lagrange equations for the associated energy functional. Experiments considering different rotation speeds and axial loads acting on the propulsion shaft system were performed to verify the numerical model. The effects of system parameters such as shaft length and diameter, stiffness and damping coefficients, and cross-section eccentricity were also studied. The cross-section eccentricity increased the displacement response, yet coupled vibrations were not initially observed. With the increase in the eccentricity, the interaction between two vibration modes became apparent, and the agreement between numerical predictions and experimental measurements improved. Given the results, the modified version of the Jeffcott rotor model can represent the coupled torsional–transverse vibration of propulsion shaft systems.

Original language	English
Pages (from-to)	201-212
Number of pages	12
Journal	Journal of Marine Science and Application
Volume	20
Issue number	2
DOIs	https://doi.org/10.1007/s11804-021-00205-2
Publication status	Published - Jun 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s).

Funding

This investigation was supported by the Scientific and Technological Research Council of Turkey (TUBITAK) 2214-A International Doctoral Research Fellowship Programme, while experiments were performed at the Wuhan University of Technology. The authors thank Professor Xinping Yan, Dr. Cong Zhang, and Dr. Qianwen Huang at Wuhan University of Technology for their valuable support and guidance during the corresponding author?s academic visit to China. The corresponding author also thanks Asst. Prof. Bahad?r U?urlu and Ress. Ass. Ismail Kahraman from Istanbul Technical University for their support and patience.

Funders	Funder number
TUBITAK
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu
Istanbul Teknik Üniversitesi
Wuhan University of Technology

Keywords

Coupled torsional–transverse vibrations
Coupled vibration in rotor system
Cross-section eccentricity
Forced vibrations
Jeffcott rotor
Marine propulsion shaft system

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10.1007/s11804-021-00205-2

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title = "Effect of Coupled Torsional and Transverse Vibrations of the Marine Propulsion Shaft System",

abstract = "In this study, the coupled torsional–transverse vibration of a propeller shaft system owing to the misalignment caused by the shaft rotation was investigated. The proposed numerical model is based on the modified version of the Jeffcott rotor model. The equation of motion describing the harmonic vibrations of the system was obtained using the Euler–Lagrange equations for the associated energy functional. Experiments considering different rotation speeds and axial loads acting on the propulsion shaft system were performed to verify the numerical model. The effects of system parameters such as shaft length and diameter, stiffness and damping coefficients, and cross-section eccentricity were also studied. The cross-section eccentricity increased the displacement response, yet coupled vibrations were not initially observed. With the increase in the eccentricity, the interaction between two vibration modes became apparent, and the agreement between numerical predictions and experimental measurements improved. Given the results, the modified version of the Jeffcott rotor model can represent the coupled torsional–transverse vibration of propulsion shaft systems.",

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AU - Halilbeşe, Akile Neşe

AU - Zhang, Cong

AU - Özsoysal, Osman Azmi

PY - 2021/6

Y1 - 2021/6

N2 - In this study, the coupled torsional–transverse vibration of a propeller shaft system owing to the misalignment caused by the shaft rotation was investigated. The proposed numerical model is based on the modified version of the Jeffcott rotor model. The equation of motion describing the harmonic vibrations of the system was obtained using the Euler–Lagrange equations for the associated energy functional. Experiments considering different rotation speeds and axial loads acting on the propulsion shaft system were performed to verify the numerical model. The effects of system parameters such as shaft length and diameter, stiffness and damping coefficients, and cross-section eccentricity were also studied. The cross-section eccentricity increased the displacement response, yet coupled vibrations were not initially observed. With the increase in the eccentricity, the interaction between two vibration modes became apparent, and the agreement between numerical predictions and experimental measurements improved. Given the results, the modified version of the Jeffcott rotor model can represent the coupled torsional–transverse vibration of propulsion shaft systems.

AB - In this study, the coupled torsional–transverse vibration of a propeller shaft system owing to the misalignment caused by the shaft rotation was investigated. The proposed numerical model is based on the modified version of the Jeffcott rotor model. The equation of motion describing the harmonic vibrations of the system was obtained using the Euler–Lagrange equations for the associated energy functional. Experiments considering different rotation speeds and axial loads acting on the propulsion shaft system were performed to verify the numerical model. The effects of system parameters such as shaft length and diameter, stiffness and damping coefficients, and cross-section eccentricity were also studied. The cross-section eccentricity increased the displacement response, yet coupled vibrations were not initially observed. With the increase in the eccentricity, the interaction between two vibration modes became apparent, and the agreement between numerical predictions and experimental measurements improved. Given the results, the modified version of the Jeffcott rotor model can represent the coupled torsional–transverse vibration of propulsion shaft systems.

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Effect of Coupled Torsional and Transverse Vibrations of the Marine Propulsion Shaft System

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