The vibration amplitude,vibration direction and other dynamic response characteristics at different positions of the vibrating screen body are inconsistent,if the motion of the entire screen body is regarded as the same,there will be some errors in the process of improving the vibrating screen body.A dynamic model was established to reflect the vibration amplitude and direction at different positions of the vibrating screen,the fourth-order Runge-Kuta method was used to solve the model,the vibration characteristics of the vibrating screen body were analyzed,and the multi-objective optimization study on the vibration trajectory was carried out by Non-dominated Sorting Genetic Algorithm Ⅱ(NSGA-Ⅱ).The results showed that the corresponding vibration characteristics of different positions of the vibrating screen were beneficial to the screening of materials;After multi-objective optimization,the vibration direction and angle of the feed position was basically the same,and the amplitude decreased slightly,while the characteristics of high frequency and low amplitude were also conducive to the screening operation;The vibration angle of the discharge position was obviously reduced,and the amplitude was basically unchanged,which could further strengthen the screening effect of the material.
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