Mamontov A. Improvement of performance of smooth running and dynamic loading of running systems of wheeled tractors at transport works

The dissertation is devoted to improving the operational properties of a wheeled tractor in an aggregate with a semi-trailer when driving in transport modes, due to the equipment of the front axle with a combined air spring suspension and determining its rational parameters. A generalized mathematical model of the longitudinal-angular, vertical and longitudinal oscil-lations of a machine-tractor unit based on a wheeled tractor in an aggregate with a semi-trailer has been compiled, which allows us to study the smoothness and dynamic loading of the running system with taking into account the nonlinearity of the elastic and dissipative characteristics of the suspension, as well as the structural characteristics of the towing device. Theoretical studies have been carried out, which made it possible to give an objective assessment of the influence of the type of suspension and its design parameters on the smoothness and dynamic loading of the wheeled tractor running system. Ways to improve the suspension system are identified and recommendations for the selection of ra-tional suspension parameters are developed. Based on experimental studies, the reliability of the math-ematical model of the movement of a machine-tractor unit at transport speeds is confirmed. The rec-ommendations regarding the selected rational parameters of the suspension system of the front axle of the wheeled tractor are also confirmed.