Abstract
When agricultural machines are operated on pavements, the vibration and noise caused by the interaction between the tire lugs and the road surface are inevitable. Therefore, it is important to investigate the lug excitation force occurring on rolling agricultural tire in order to clarify the vibration generation mechanism. In our previous study, it is con- sidered that the dynamic behavior of rolling agricultural tire is influenced by the vibration characteristics of the tire. Further, only the rigid modes among the natural modes could affect the rolling tire behavior. So, we modeled the tire as a circular rigid ring supported on an elastic foundation with contact model. This rigid ring model can be valid to investigate the lug excitation force, while it is necessary to measure forces acting on tire shaft. In this study, the test equipment is modified to measure tire shaft and forces acting on tire shaft at rolling are measured. From the obtained results, the shaft force characteristics are investigated.
