Subharmonic centrifugal pendulum vibration absorbers allowing a rotational mobility
Article dans une revue avec comité de lecture
Rotating machines are often subjected to fluctuating torques, leading to vibrations of the rotor and finally to premature fatigue and noise pollution. This work addresses a new design of centrifugal pendulum vibration absorbers (CPVAs), used to reduce the vibrations in an automotive transmission line. These passive devices, composed of several masses oscillating along a trajectory relative to the rotor, are here tuned at a subharmonic of the targeted harmonic torque frequency. Thanks to the inherent non-linearities, a CPVA with two masses oscillating in phase opposition is able to efficiently counteract the input torque, with particular features such as saturation phenomena. This work particularly extends previous works to a new class of CPVA, whose peculiarity is that masses admit a significant rotation motion relative to the rotor, thus adding the benefit of their rotatory inertia. Results on the system’s subharmonic response and its stability are obtained thanks to an analytical perturbation method, and design guidelines are proposed. The validity of those results is also confirmed through comparisons with numerical solutions and the performance of this subharmonic system is compared to that of a classical CPVA tuned at the torque frequency.
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Article dans une revue avec comité de lectureMAHE, V.; RENAULT, Alexandre; GROLET, Aurélien; THOMAS, Olivier; MAHE, Hervé (Elsevier BV, 2022-01)Centrifugal pendulum vibration absorbers (CPVA) are used in the automobile industry to reduce the vibrations of the transmission system. These passive devices are made of several masses oscillating along a given trajectory ...
On the dynamic stability and efficiency of centrifugal pendulum vibration absorbers with rotating pendulums Article dans une revue avec comité de lectureMAHÉ, V.; RENAULT, Alexandre; GROLET, Aurélien; MAHÉ, Hervé; THOMAS, Olivier (Elsevier BV, 2022-10)The automotive industry uses centrifugal pendulum vibration absorbers (CPVAs) to reduce vibrations of the transmission system. These passive devices are made of several masses oscillating along a given path relative to a ...
Computation of dynamic transmission error for gear transmission systems using modal decomposition and Fourier series Article dans une revue avec comité de lectureABBOUD, Eddy; GROLET, Aurélien; MAHÉ, Hervé; THOMAS, Olivier (Springer, 2021-11)In this paper, a method for computing the dynamics of a geared system excited by its static transmission error is proposed. The method is based on the iterative spectral method (ISM) and on the harmonic balance method ...
Article dans une revue avec comité de lectureRENAULT, Alexandre; THOMAS, Olivier; MAHÉ, Hervé (Elsevier, 2019)Tuned dynamic absorbers are usually used to counteract vibrations at a given frequency. Presence of non-linearities causes energy-dependent relationship of their resonance and antiresonance frequencies at large amplitude ...
Article dans une revue avec comité de lectureAULELEY, Michel; GIRAUD-AUDINE, Christophe; MAHE, Hervé; THOMAS, Olivier (Elsevier BV, 2021)This article proposes a novel mean for tuning the natural frequency of an electromagnetic resonant shunt, using a pulse-width modulation (PWM) circuit. It is used to modulate the value of the capacitance of the shunt, and ...