Tverdohlib. Influence of geometric parameters of a wheeled vehicle propulsion and unevenness of the reference surface on the speed of movement and frequency of disturbing action

Abstract

The influence of the condition of the support surface and geometrical parameters of the tractor wheel on the speed of its movement and the frequency of vibrational vibrations that arise in this case are investigates in the article. This issue is of considerable theoretical and practical importance, because the irregularities of the frame and wheel oscillations of the road lead to a significant deterioration of the tractor's operational performance.

This question has been studied by a number of researchers, but they were diverse and narrow-minded. For this reason, the task was to examine more deeply the relationship between the condition of the wheel and the coating with the vibration oscillation parameters that occur during movement.

In theoretical studies, the relationship between the wheel chord length and the irregularities between the two wheel contact points were established. The equation of the reference surface was represented by a sine wave with a variable amplitude coefficient. Depending on the ratio of the wheel radius and the geometric dimensions of the projections and the depressions of the support surface, two sets of equations were obtained describing the parameters of vibrational vibrations. The results of the analytical studies were illustrated by the corresponding geometric dependencies.

In order to verify the theoretical references, experimental studies were conducted with a system for measuring the vibration oscillation parameters of the wheeled wheeled agricultural tractors. The studies were performed on two pavement variants. The results of the experimental studies are presented graphically in the form of oscilloscope vibration acceleration of the driven axle of the tractor, as well as in tabular form.

Conducted theoretical and experimental studies show that there is an inverse relationship between the magnitude of the wheel radius and the vibration oscillation parameters. As the translational speed of the tractor increases, the vibration oscillation parameters also increase.