Stability Analysis and Complex Dynamics of a Gear-Pair System Supported by a Squeeze Film Damper

Author:

Chen Chin-Shong1,Natsiavas S.2,Nelson H. D.3

Affiliation:

1. Optima CAE, Inc., Novi, MI

2. Department of Mechanical Engineering, Aristotle University, 54006 Thessaloniki, Greece

3. Department of Engineering, Texas Christian University, Fort Worth, TX 76129

Abstract

The stability properties of periodic steady state response of a nonlinear geared rotordynamic system are investigated. The nonlinearity arises because one support of the system includes a cavitated squeeze film damper, while the excitation is caused by mass unbalance. The dynamical model and the procedure which leads to periodic steady state response of the system examined have been developed in an earlier paper. Here, the emphasis is placed on analyzing the stability characteristics of located periodic solutions. Also, within ranges of the excitation frequency where no stable periodic solutions are detected, the long time behavior of the system is investigated by direct integration of the equations of motion. It is shown that large order subharmonic, quasiperiodic and chaotic motions may coexist with unstable periodic response in these frequency ranges. Finally, attention is focused on practical consequences of these motions.

Publisher

ASME International

Subject

General Engineering

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