Assessment of rigid and absorbing properties of pneumatic tires under complete loading of the wheel by the example of action of normal and lateral forces
The elastic tire of a wheeled vehicle is that primary element of a complex dynamic system, which largely determines the degree of loading of its load-bearing structure and transmission, as well as the quality of the main operational properties. The influence of the lateral force on the wheel on the stiffness and absorption properties of a pneumatic tire has not yet been studied. The presence of a complex loading tire stand equipped with attachments for loading the tire with lateral force with a tracking effect at normal load allowed us to conduct a series of experimental studies on passenger car tires and identify the main laws of this effect. The results of processing the experimental characteristics of the normal stiffness of the tested tires showed that the elliptical-power model quite adequately reflects the ability of the pneumatic tire to absorb and dissipate part of the energy transmitted through it during vertical wheel vibrations. In addition to the normal loading of the tire by lateral force, it does not derive the values of the model parameters from those limits that were obtained under single loading by normal force. And the effect of additional loading on the absorptive capacity of a tire is manifested similarly to the effect of internal air pressure, i.e. a change in the stiffness coefficient in the direction of its decrease.