Influence of Random Pitch Errors on the Nonlinear Dynamics of Gear Trains

Abstract

For realistic gear system dynamic response predictions especially in cases, characterised with important outer load variations, as e.g. in transport means transmissions, simplified rheo-linear models, supposing ideal involute tooth profiles and ideal mesh conditions, resulting in a linear system behaviour [1], are not satisfactory. As experiments and theoretical considerations show, tooth geometry specialities, as tip relief, one of the most effective tool for dynamic behaviour improvement, real mesh conditions and mesh irregularities, influenced considerably by manufacturing errors, are to take into consideration. All these parameters, influencing the inner excitation effects of gears, generate load dependent parametric excitation, so strongly nonlinear system response develops. [2,3]