Experimental validation of a centrifugal double pendulum vibration absorber model

This article deals with the experimental validation of a theoretical model describing the dynamics of a special class of centrifugal pendulum vibration absorbers, designed to reduce the torsional vibrations of rotating machines. The original architecture proposed in this work consists in cylindrical-shaped masses rolling onto each other and acting as double pendulum absorbers. The main interest of these double pendulums lies in the two antiresonances they generate on the main system, which allow to reduce the vibrations at two harmonic orders, unlike standard single pendulum absorbers. The measurements are conducted on an architecture with six double pendulums. They focus on the first rotor antiresonance in the linear and nonlinear regimes, and they are compared to theoretical results from the literature. To the authors' knowledge, this is the first experimental observation of one of the rotor's torsional antiresonances and the first experimental validation of a double pendulum absorber model.