Influence of angular damping coupling on the vibrations of a triaxial two-section non-suspension wheeled vehicle

This article is devoted to the study of the influence of angular damping coupling (АDС) on the vibrations of a triaxial two-section non-suspension wheeled vehicle. To assess the effect of the damper in the articulation unit on the vibrations of such a vehicle, three options for combining the parameters of the suspension system and the ADC are considered: wheeled articulated vehicle with suspension and without ADC; wheeled articulated vehicle without suspension and without ADC; wheeled articulated vehicle without suspension and with ADC. Based on the generally accepted assumptions of the linear theory of suspension, a calculation scheme and a mathematical model of the angular oscillations of a triaxial two-section non-suspension wheeled vehicle with ADC in the articulation unit are presented. During finding analytical solution, expressions for the gain of oscillations for the folding angle of identical sections were found and their maximum values in resonance were determined. For the considered options, the ratios of the amplification coefficients of the angular oscillations in resonance and the expressions for the relative damping coefficient of the oscillations along the folding angle of the sections are determined. The calculated amplitude-frequency characteristics (AFC) of the folding angle of the sections for various combinations of ADC parameters in the presence and absence of suspension of the vehicle sections are presented. It is established that the introduction of ADC for a wheeled non-suspension vehicle allows one to reduce the amplitude of angular oscillations in resonance by 10 times. And, when using wheels, the rigidity of which is equal to the stiffness of the suspension, for non-suspension articulated vehicles, an even greater decrease in angular oscillations to a dynamic coefficient of 1,7 is possible. At the same time, the angular damper for the non-suspension vehicle, the inelastic resistance of which is equal to the total power of all 8 shock absorbers of the sprung vehicle, provides smaller angular oscillations in the entire frequency range of the kinematic disturbance on the side of the road. It is advisable to use the proposed articulated layout arrangement of non-suspension vehicle with UDS for developing promising wheeled vehicles, for example, tractors and heavy vehicles with large-diameter wheels.

suspensionless wheeled vehicle, articulated circuit, angular damping coupling, frequency response, smoothness