SIMULATION OF THE WHEEL SEPARATION PROCESS FROM A BUMP FOR A WHEELED MACHINE WITH HYDRO-PNEUMATIC SUSPENSION

A mathematical model of the process of wheel detachment from bumps for a wheeled machine with hydropneumatic suspension, which has a new kinematic scheme, is presented. Kinematic and dynamic separations, calculation of the moment of their onset, dynamics of wheel movement during the separation process and the moment of its meeting with an unevenness and restoration of contact of the tire with the road are considered. Accurate kinematic and power factors are calculated, including the characteristics of the elastic hinges of the suspension arms. Analytical dependences of the calculation of displacement and speed of movement of the pneumohydraulic spring rod, as well as the angle and speed of rotation of the lower lever in the process of separation of the wheel from the ground were obtained. The differential equation of the movement of the wheel in the process of separation from the unevenness was formulated. The obtained results will allow to ensure high accuracy of mathematical modeling of the movement of a wheeled vehicle over unevenness when studying the smoothness of the course, the load of the power plant, transmission and undercarriage components, as well as ensuring the controllability and stability of the movement.