The effects of Coulomb friction on the performance of centrifugal pendulum vibration absorbers

We investigate analytically and experimentally the effects of Coulomb friction on the performance of centrifugal pendulum vibration absorbers (CPVAs), which are used to reduce torsional vibrations in rotating machinery. The analysis is based on perturbation methods applied to the nonlinear equations...

Full description

Saved in:
Bibliographic Details
Published in:Nonlinear dynamics 2012-07, Vol.69 (1-2), p.589-600
Main Authors: Vidmar, Brendan J., Feeny, Brian F., Shaw, Steven W., Haddow, Alan G., Geist, Bruce K., Verhanovitz, Nathan J.
Format: Article
Language:English
Subjects:
Absorbers
Automotive Engineering
Classical Mechanics
Control
Coulomb friction
Dry friction
Dynamical Systems
Engineering
Equations of motion
Free vibration
Friction
Mathematical analysis
Mathematical models
Mechanical Engineering
Noise measurement
Nonlinear dynamics
Nonlinear equations
Original Paper
Pendulums
Perturbation methods
Rotating machinery
Vibration
Vibration damping
Vibration measurement
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate analytically and experimentally the effects of Coulomb friction on the performance of centrifugal pendulum vibration absorbers (CPVAs), which are used to reduce torsional vibrations in rotating machinery. The analysis is based on perturbation methods applied to the nonlinear equations of motion for a rotor subjected to an engine order applied torque and equipped with a circular path CPVA with viscous and Coulomb damping. The experimental work is based on quantifying parameters for the damping model using free vibration measurements with a viscous and Coulomb damping identification scheme that is enhanced to better handle measurement noise, and running tests for steady-state operation under a range of loading conditions. The level of Coulomb damping is varied by adjusting the friction of the absorber connection bearing. Good agreement is found between the analytical predictions and the experimental data. It is shown that the absorber sticks up to a level of excitation that allows it to release, after which the Coulomb damping acts in the expected manner, resulting in lowered response amplitudes. The results obtained are of general use in assessing absorber performance when dry friction is present in absorber suspensions.
ISSN:0924-090X
1573-269X
DOI:10.1007/s11071-011-0289-7