Calcul et optimisation d’absorbeurs pendulaires dans une chaîne de traction automobile

Abstract : In the context of the reduction of polluting emissions and fuel consumption of thermal engines of vehicles, automotive manufacturers try to reduce cylinder capacity and engine speed of rotation. These evolutions lead to significant increase of irregularities of rotation. The so-called centrifugal pendulum vibration absorber is a recent solution of mitigation of torsional vibrations in automotive powertrains. It acts as a mass damper tuned on the firing order of the engine and allows reduction of vibrations. However, strong non-linearities intrinsic to pendular systems cause a detuning of the device at large amplitude of motion resulting in a loss of performances. This thesis aims to improve the understanding and the behavior of the system in interaction with an automotive driveline. In support of classic time integration procedures, the nonlinear system is solved through the asymptotic numerical method coupled to the harmonic balance method. In addition, an original continuation of antiresonance method is proposed as well as some design rules derived from analytical developments. Experimental validation shows a significant enhancement of performances of the system.
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Alexandre Renault. Calcul et optimisation d’absorbeurs pendulaires dans une chaîne de traction automobile. Génie mécanique [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2018. Français. ⟨NNT : 2018ENAM0022⟩. ⟨tel-01997628v2⟩

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