基于载荷流的高速烟支切割系统结构减振方法

Structural Vibration Reduction Method of High Speed Cigarette Maker System Based on Load Flow

目的为解决独立驱动烟支切割装置高速作业时振动过大的难题,开展系统模态分析与结构减振研究。方法建立烟支切割系统数字模型,开展有限元模态分析,提取前5阶固有频率和振型,研究模态对烟支切割性能的影响规律。设计烟支切割系统模态试验,验证计算模态的可靠性,最后提出基于载荷流的加强筋优化设计方法,实现结构减振。结果有限元仿真计算各阶模态频率与试验模态各阶频率误差在5%以内,而改进后的烟支切割系统一阶固有频率提高了14%,有效避开了刀盘激励频率范围。结论原高速烟支切割装置作业时振动过大的主要原因是一阶固有频率在刀盘激励频率范围内,发生了共振。改进后的烟支切割系统刀盘激励频率有效避开了共振区间,烟支生产质量可得到提高,为高速烟支切割系统结构减振设计提供了技术支撑。

To reduce excessive vibration in an independently driven cigarette maker under high speed,the work aims to study the modal analysis and vibration absorption of the device.The digital model of the cigarette maker was built,and the modal analysis was analyzed by finite element method.The intrinsic frequencies and vibration modes of the first five orders were extracted to investigate their effects on the cigarette maker performance.The modal test of the cigarette maker was designed to verify the reliability of the calculated modes.The optimization design method of reinforcement based on load flow was proposed to realize the structural vibration reduction.The error between the modal frequencies calculated by finite element simulation and the experimental modal frequencies for each order was less than 5%,while the intrinsic frequency of the first order by the improved cigarette maker system increased by 14%,effectively avoiding the excitation frequency range of the cutter head.The main reason for the excessive vibration of the original high speed cigarette maker is that the first-order intrinsic frequency resonates within the excitation frequency range of the cutter head.The excitation frequency of the improved cigarette maker system effectively avoids the resonance range,and the quality of cigarette production can be improved,which provides technical support for the structural vibration reduction design of high speed cigarette maker system.