Simulation model for the determination of energy losses during vibrations of the working equipment of a earth-moving machine in the transport mode

Abstract

Abstract A simulation model for a earth-moving machine is developed using a motor grader as an example. The model comprises a chassis base frame, a front balancing bridge, rear balancing carts and working equipment – a traction frame with a moldboard. These elements are included in the form of separate moving elements. The simulation model allows the vibrations of the machine units to be explored while it moves along the microrelief of a reference surface, as well as the energy loss due to friction in the suspension elements of the working equipment to be determined. Using this simulation model, the amount of energy accumulated with the help of improved suspension devices for the working equipment of the motor grader can be assessed. This allows for the combination of the vibration damping of the working equipment in the transport mode and the oscillation energy accumulation. The effect of the stiffness and viscous friction coefficients of the hydraulic cylinders for raising and lowering the moldboard with a device for dynamic vibration damping and the accumulation of their energy on the total amount of energy spent on dissipation in the hydraulic components of the working equipment suspension elements is established. The resulting graphical functional dependence allows the optimization of the parameters of the hydraulic, mechanical and electrical parts of the system of the vibration damping and energy storing device to be implemented.