Study on Vibration and Noise Reduction of Tractor Cab (Part 2)

Effect of Cab Suspension on Vibration Reduction

Abstract

In the Part 1 of this report series we showed that the noise in the tractor cab increased because of solid borne sound, which was generated by the vibrations of cab walls caused by engine vibration. In this part we suggest a cab suspension method to reduce the vibrations of cab walls, in order to reduce the solid borne sound in a low frequency range. Vibrations of a model cab were analysed theoretically in the cab suspension system and measured closely by experiments. From the consideration on the theory and test results, it was clarified that the suggested cab suspension system had a considerable effect on the vibration reduction. The lower the spring rate of suspension system was, the more the effect was.