Abstract
Tire models are of great importance for precise investigations of vertical vehicle dynamics, including vehicular safety and riding comfort. An adequate modeling of the tire is crucial to properly reproduce vehicle vertical behavior in simulations and to evaluate the influence of the tire in the overall performance of the suspension system. This paper introduced vehicle single-point tire models and, thereafter, investigated the influence of the excitation frequency and inflation pressure on the damping and stiffness coefficients of the proposed tires experimentally. In this manner, a test-bench was used to obtain the model parameters of a light vehicle tire and a motorcycle tire. Given the obtained results, it has been observed that both factors have a significant effect on the parameters of the proposed tire models. Moreover, a quarter car suspension model was investigated using the modelled tires to illustrate the influence of the correct characterization of the tire on the vertical suspension performance.
Highlights
The proper modeling of the tire is essential to adequately reproduce vehicle vertical behavior in vehicle dynamics simulations
A test bench in which only the tire is taken into account in the measurement of stiffness and damping coefficients has been developed in this work
INFLUENCE OF THE TIRE MODEL IN THE VEHICLE VERTICAL DYNAMICS The influence of the models obtained in the previous section on the behavior of the vehicle suspension system is evaluated
Summary
The proper modeling of the tire is essential to adequately reproduce vehicle vertical behavior in vehicle dynamics simulations. Test benches used to determine tire vertical stiffness and damping do take into account the deformation of the tire, but are influenced by the deformation of the rim and by the effects of the unsprung mass. This situation is commonly found in test benches in which the tire is rotating. A test bench in which only the tire is taken into account in the measurement of stiffness and damping coefficients has been developed in this work This test bench makes it possible to study other effects such as tire viscoelasticity and hysteresis.
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