Modelling and simulation of a disturbed vibroacoustic signal in helical gears

摘要

Understanding the dynamic processes, including the energy dissipation process, which accompany the operation of toothed gears is the basis for development of designing the reliable power transmission units additionally characterized by high torque to gear weight and dimensions ratio, and by acceptable noise levels. Despite doubtless progress in this field, there are still many questions as regards to the process of vibroacoustic signal generation, especially in helical gears. Many of these problems can be solved by appropriately broadened classical dynamic models, some however require a new analytic approach. Among these we should certainly include the phenomenon of generation of side lobes around the energetically essential carrier frequencies andappearance of additional carrier functions as the defects develop. This leads to changes in the structure of vibroacoustic signal which are typical for the phenomena of modulation but which are difficult to interpret on the basis of linear models of thevibration and F noise generation processes.