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建立振动筛系统的力学模型与运动微分方程，通过MATLAB软件分析振动筛系统的运动状态。利用数值模拟的方法，在一定的参数下，以转速为参数画出其幅频特性曲线图，结合轴心轨迹图和波形图分析振动筛筛网的运动特性。“,”Analyzing the motion state of vibration screen by Matlab software,a mechanical model and differential equation of vibration screen are established.By using the numerical simulation method. Under certain parameters,making speed as the parameter to draw amplitude-frequency characteristic curve,combined with chart of axes track and wave forms graph to analyze motion of vibration screen system.