A strategy of vibration control for rotors with dry friction dampers

It is an attractive research topic to propose some novel damping methods for rotors, and the dry friction damping is probably an effective and stable method. In this paper, a control strategy is proposed based on the relationship between the rotor modal characteristics and rotor responses. Firstly,...

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Published in:Journal of Vibration and Control 2023-07, Vol.29 (13-14), p.2907-2920
Main Authors: Liu, Di, Zhou, Liang, Zhang, Dayi, Wang, Hong
Format: Article
Language:English
Subjects:
Dampers
Damping ratio
Dry friction
Friction
Rotors
Vibration
Vibration control
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description It is an attractive research topic to propose some novel damping methods for rotors, and the dry friction damping is probably an effective and stable method. In this paper, a control strategy is proposed based on the relationship between the rotor modal characteristics and rotor responses. Firstly, a rotor model with a new kind of dry friction damper is established and corresponding complex nonlinear modes are derived. Then, based on that, the rotor modal characteristics are analyzed, with the nonlinear damping ratio used to evaluate the damping performance. Considering the effective working region for traditional dry friction dampers is usually narrow, a control strategy suiting for a broader range of load conditions is proposed. The results show that the vibration amplitude of the rotor at critical speed can be effectively controlled by the proposed strategy, implying its prospects in engineering practice.
doi_str_mv 10.1177/10775463221093105
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subjects Dampers
Damping ratio
Dry friction
Friction
Rotors
Vibration
Vibration control
title A strategy of vibration control for rotors with dry friction dampers
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