Calculation of normal stiffness and contact patch of ultra-low pressure tires for agricultural machinery

BACKGROUND:The impact of tires on a deformable ground surface determines not only the ability vehicle to move, but also pressure through contact patch geometric characteristics. The soil is normalized and limited by conditions for preservation its agrophysical properties. Therefore, when creating vehicles various purposes their movement or trailers surfaces, it required calculate in design process. However, currently there are no universal dependencies calculation mentioned parameters ultra-low tires. This applies both vertical inclined tire arrangement.
 AIMS:Development implementation methods normal stiffness con-tact ultra-low-pressure agricultural machinery.
 MATERIALS AND METHODS:Software products such as MS Excel, MATLAB Curve Expert Professional were used modeling.
 RESULTS:The analytical-experimental dependence has been obtained determine stiff-ness tires, including possible inclination wheel rotation axis. takes into account pressure, load, an angle axis formula determining contour area tire. It helps current ground, which should exceed specified value.
 CONCLUSIONS:The method length, developed implemented. all