Abstract and keywords
Abstract (English):
In the article, the results of experimental determination of the radial stiffness of the baseline BEL-186 tire and the ultra-low-pressure SHAINA-2 tire used on the Uralets-254 mini tractor are presented. The tests were carried out on the SIHSh 2500-1000 test bench under various normal loads and inflation pressures. The stiffness characteristics and operating ranges of relative deformations were obtained. It was found that ultra-low-pressure tires exhibit significantly lower radial stiffness, which creates prerequisites for reducing operator vibration exposure and improving the ride smoothness of the mini tractor. The obtained results can be used for tire selection and for developing dynamic models of tractor–implement systems.

Keywords:
smooth running, tire stiffness, minitractor, elastic properties, tire air pressure
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