Research On Dynamics Analysis Of Large Vibration Screen And Topology Optimization Of Side Panel

For now, the vibrating screen is in the direction of large-scale. The large vibrating screen can improve the efficiency of production, reduce the equipment's cost and improve the economic. But with the large vibrating screen coming, its size and the exciting force increases. In order to increase the structure's stiffness and strength, what often occurs on the vibrating screen's side panel and other structural components is stress and deformation get bigger, at the same time, cracks and fatigue failure often occurs. The large vibrating screen's working reliability depends on its dynamic characteristics. The dynamic characteristics and optimization analysis have great importance to the large vibrating screen.In this paper, we use topology optimization methods for vibration optimal design. Under the given conditions, making sure the location and number of voids within the structure, the connected topology methods, the external load passed to structure, to make sure the target of the structure is called topology optimization.The large linear vibrating screen is considered as the object of study. Firstly, a vibrating screen's model is established. Then, kinematics analysis is fulfilled to determine the process parameters. The finite element analysis model of the whole system and main components is built by ANSYS software. Modal and harmonic response analysis of the whole system and main components is fulfilled. The low-levels natural frequencies and mode shapes, dynamic stress and deformation results are gotten. The natural frequency of the beams, expected beams, discharged beams and spring supports are far away from the working frequency. Dynamic stress and deformation of the machine and the main components are in the allowable range. According to the pseudo density distribution of the topology optimization, the stiffeners would be rewired. The topology optimization model of side panel stiffeners which were based on the goal of maximizing the lateral stiffness of side panel stiffeners was established,then, the stiffeners would be rewired Based on the variable density method of topology optimization theory. Compared with the original side panel structure, the new side panel's dynamic stress was reduced, Vibration displacement was reduced, too. The new side panel's strength, stiffness, natural frequencies were better than which stiffeners are empirically arranged. Using nominal stress method (S-N), the side panel and beams' fatigue life analysis is fulfilled by MSC. Fatigue software. Both have reached the minimum requirements for fatigue life based on the results. Side plate into the edge of the middle position is the most prone to fatigue damage. The middle position of the beam is the most prone to fatigue damage. The topology optimization results were fully verified.