Article Dans Une Revue Journal of Sound and Vibration Année : 2024

The localised response and filtering performance of centrifugal pendulum vibration absorbers allowing a rotational mobility

Résumé

Rotating machines are often subjected to fluctuating torques, which causes rotor vibrations, early wear and noise pollution. These vibrations can be reduced using centrifugal pendulum vibration absorbers (CPVAs), which are passive devices made of several bodies (pendulums) oscillating along a given path and rotating relatively to a rotor. Previous studies showed that the dynamics of these devices is subjected to instabilities leading to a localisation of the motion of the pendulums. In this paper, the localised behaviour of a CPVA made of two pendulums allowed to rotate about their centre of mass is investigated. To this aim, a dynamical model based on an analytic perturbation method is established. The aim of this model is to highlight some special features of the localised response, such as the appearance of quasi-periodic regimes. The case studies showed that in some special cases, localisation can improve the filtering efficiency as compared to a unison motion. The validity of the model was confirmed through a comparison with numerical resolutions of the system’s dynamics.

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hal-05040992 , version 1 (30-07-2025)

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Vincent Mahé, Alexandre Renault, Aurélien Grolet, Hervé Mahé, Olivier Thomas. The localised response and filtering performance of centrifugal pendulum vibration absorbers allowing a rotational mobility. Journal of Sound and Vibration, 2024, 571, pp.118028. ⟨10.1016/j.jsv.2023.118028⟩. ⟨hal-05040992⟩

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