摘要
高方平筛在启运过程中 ,筛体会出现较大的瞬态振幅 ,且要经过长的时间才能达到稳态振动 .从动力学理论出发 ,建立系统的力学模型和动力学方程 ,并通过计算机数值仿真 ,揭示了产生这种现象的机理 ,分析了启动加速度和系统阻尼对启动过程的影响 ,给出了改善平筛启动性能的途径 .
During starting of the plansifter,the transient radius of the circle of gyration increases perceptibly as the excited frequency passes through the resonance area,and the starting process lasts for a long time until the steady motion is reached.Based on dynamic theory,a mechanical model of the system is established,and its dynamic equations are derived.By digital simulation,the phenomenon is explained,and the effect of starting acceleration and damping of system on the starting process is studied.
关键词
动力学分析
高方平筛
启动过程
数值仿真
粉料分级
square plansifter
centrifugal weight
starting process
natural frequency
digital simulation
