DYNAMIC PROBLEMS IN VEHICLE TRANSMISSION DESIGN

摘要

In this note, we point out the dynamic problems of motion transmission from gearbox to wheels due to the modal shapes of vibration of the system, when they come within ranges of excitation of the engine, of cardanic joints, of transmission centrifugal force etc.. Such detrimental vibrations are transmitted to the car body directly through possible transmission mountings, or indirectly, through the elastic suspension of the engine, affecting the comfort. This paper refers about the vehicle transmission dynamic analysis and its results in terms of loads and body exciting frequencies. The analysis is carried out with discretization methods and modal analysis. It allows to locate some noise sources and, as a consequence, to plan design modifications, limiting the acoustic emission and improving the corn fort, since the pre-engineering phase.