A damper of torsional vibrations and an investigation of its efficiency

Abstract

This paper reviews an original torsional vibration damper retaining its efficiency over a wide disturbing frequency band. Some potential design alternatives are considered. The basic structural element of the damper is a rotary flexible ring. The paper investigates the motion system on the basis of a set of nonlinear differential equations. By separating the motion into uniform rotary and oscillatory, expanding the equation coefficients into a Tar/or's power series and excluding the static members, a system of equations for insignificant oscillations is derived. The system contains inertia, flexible and gyroscopic terms. The equations of motion are derived and the stability conditions for the system s dynamic balance are formulated. Proper consideration is given to other possible loss-of-stability forms and regions of the flexible ring. An analysis of the system s natural frequencies is made. 77;e efficiency estimation of the damper versus various parameters is effected as a result of the expression of the equivalent inertia moment and its limit values.