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Vibration suppression of a rotor system with a nonlinear MR damper

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Abstract

This paper focuses on the influence mechanism of magnetorheological damper (MR damper) on the dynamic characteristics of a rotor system and its damping effect. In this work, the structure of an MR damper in the form of a double coil is designed. The magnetic circuit of the MR damper is analysed by the finite element method and verified by experiments. Then, the MR damper is assembled into a rotor system and a general model of a rotor-bearing system supported by MR damper is proposed, in which the magnetorheological fluid (MR fluid) is modelled as lubricating oil with bilinear characteristics. The finite element model of the rotor system is established and solved by the Newmark-β method. The results indicate that the structure of the damper is reasonable and can reach the magnetic induction intensity required for MR fluid saturation. With an appropriate current, the MR damper has better performance in vibration suppression. However, if the applied current is not appropriate, the nonlinearity of the MR damper is excited, which results in the instability of the rotor system. This research discovers the influence mechanism of the MR damper to a rotor system, which is helpful for the vibration control of a rotor system and the design of the MR damper.

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Acknowledgements

This work is supported by the Joint Funds of National Science Foundation of China and Civil Aviation Administration Foundation of China (No. U1833108), Tianjin municipal Natural Science Foundation (No. 17JCQNJC04600) and Scientific research projects of Tianjin Education Commission (No. 2020KJ060).

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Authors and Affiliations

  1. Tianjin Key Laboratory for Civil Aircraft Airworthiness and Maintenance, Civil Aviation University of China, Tianjin, 300300, China

    Liang Ma & Chenghao Li

  2. State Key Laboratory of Engine, Tianjin University, Tianjin, 300072, China

    Jun Wang

  3. Renai College, Tianjin University, Tianjin, 301636, China

    Jun Wang

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  1. Liang Ma
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  2. Jun Wang
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  3. Chenghao Li
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Correspondence to Jun Wang.

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Ma, L., Wang, J. & Li, C. Vibration suppression of a rotor system with a nonlinear MR damper. Arch Appl Mech 91, 4053–4068 (2021). https://doi.org/10.1007/s00419-021-01993-3

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