Vibration behaviour modelling for a low-speed gearbox

This work focuses on the vibration behaviour of a low-speed gearbox for vibration machine failure monitoring. In order to establish the most important features of the vibration spectra, a theoretical model of a real machine was developed. This numerical model takes into account vibration performances of the gearbox elements including shafts, gears and bearings. The aim of this numerical model is the characterisation of the vibration path transmission in order to study its influence on the measurement locations. The model developed allows the simulation of several operating conditions, including the load and velocity variations as well as gear defects, providing information about the response along each element involved. This kind of model is a very interesting tool for gearbox design and testing and it is also very important for the development of condition monitoring techniques. In this case the model was particularised for low-speed operation.