变频激振优化之磨机混沌态仿真与实验

发布时间：2018-06-14 19:15

本文选题：变频 + 激振　；参考：《振动与冲击》2017年20期

【摘要】：针对振动磨现有技术中粉碎效率偏低之现状,进行激振机构动力学分析,利用拉格朗日方程导出其运动方程,构建Adams仿真模型,应用优化的六频段变正弦变频激振曲线,仿真模拟出不同频段下的混沌态数值图表,如相轨图、最大Lyapunov指数变化曲线、振幅-振强分布曲线等;数值表明:各频段最大频率越大,则最大Lyaponov指数越大,混沌态越强,越有利于提高系统粉碎效率;变频激振优化营造出磨机概周期内,两端的各1/3频段高振强、大振幅交替出现,中间的1/3频段中振强、中振幅相互迭出,形成一个多频多幅、混沌态强弱交变的振动利用应力场,研制样机的实验结果验证了Adams仿真模型的有效性。
[Abstract]:In view of the low comminution efficiency in the existing technology of vibration mill, the dynamic analysis of exciting mechanism is carried out, and the equation of motion is derived by using Lagrange equation, and the Adams simulation model is constructed, and the optimized six-band variable sinusoidal frequency conversion excitation curve is applied. Simulation results show that the larger the maximum frequency, the larger the maximum Lyaponov exponent, the stronger the chaotic state, the more the amplitude and vibration intensity distribution curve, the more the phase orbit diagram, the maximum Lyapunov exponent and the amplitude vibration intensity distribution curve, etc. The simulation results show that the larger the maximum Lyaponov exponent is, the stronger the chaotic state is. The higher the system comminution efficiency is, the better the frequency conversion excitation optimizes to create a high vibration intensity at each end of the 1 / 3 frequency band of the mill, with a large amplitude alternately appearing. The intermediate 1 / 3 frequency band vibrates and the middle amplitude overlaps with each other, forming a multi-frequency and multi-amplitude. The effect of the Adams simulation model is verified by the experimental results of the chaotic state with strong and weak alternating vibration using the stress field.
【作者单位】：南京工程学院机械工程学院;黄河科技学院工学院;东南大学机械工程学院;
【基金】：国家自然科学基金面上项目(51375221) 河南省科技攻关重点计划(142102210138) 南京工学学院大学生“挑战杯”培育支撑项目(TZ20170002) 国家级/江苏省大学生实践创新训练重点项目(201611276008Z)
【分类号】：TH69

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