Effects of Flexible Mounting and Damping on the Synchronous Response of a Rotor-Shaft System

Abstract

Synchronous response of a rotor supported by a damped, flexibly mounted bearing is similar to the well-known one of a rectilinear vibratory system having two degrees of freedom, or a dynamic vibration absorber. Designing the flexible support with an appropriate combination of equivalently concentrated mass of pedestal, bearing support stiffness, and optimum damping, the peak amplitude of a rotor-shaft system is found to be kept nearly to the value of rotor eccentricity. Experimental results of rotor unbalance resonance coincide well with the analytical ones.