The Rotational Vibrations of Tractors (Part 3)

Effect of Roughness of Terrain

Abstract

To evaluate the characteristics of the rotational vibrations of tractors (pitch, roll, yaw), three classes of terrains, a smooth concrete road, a rough unpaved road and a rough terrain like a grass land, were selected and the effect of the roughness of terrain on the rotational vibrations were investigated. The results showed that the angular accelerations on the rough terrain were greater than that of other two terrains. Consequently, the rotational vibration levels were increased as the roughness of terrain was increased. The roughness of terrain influenced peak levels of the angular acceleration PSD curves, but peak frequencies of PSD curves were varied very little. This showed that the frequency components of the rotational vibrations of tractors were not influenced the roughness of terrain.