The Effects of Gravity on the Response of Centrifugal Pendulum Vibration Absorbers

Abstract This article describes the effects of gravity on response systems identical, cyclically arranged, centrifugal pendulum vibration absorbers (CPVAs) fitted to a rotor spinning about vertical axis. CPVAs are passive devices composed movable masses suspended rotor, such that they reduce torsional vibrations at given engine order. Gravitational acting can be important for relatively low rotation speeds, example, during idle conditions. The main goal this study is predict CPVA/rotor system in presence gravity. A linearized model includes and an order n torque analyzed by exploiting cyclic symmetry system. results show N responds one or more groups, where each group have identical waveforms but shifted phases. nature limiting effect absorber operating envelope. number groups shown depend ratio N/n. It also there special resonant if = 1 2, latter which particularly applications. In these cases, has complicated dependence relative levels applied addition, it > 1, not affected gravity, least leading order, due effects. linear attendant analytical predictions verified numerical simulations full nonlinear equations motion.