目的 针对单面机辊系在高速运行过程中可能发生的共振现象,以及共振对瓦楞纸板成型质量、设备控制和结构安全的不利影响,开展共振特性研究。通过识别关键共振转速点,为单面机运行参数优化及设备调试提供依据,从而提高设备运行稳定性与产品质量。方法 建立上瓦楞辊、下瓦楞辊及光辊的有限元模型,开展多转速瞬态动力学仿真,获取振动响应时间序列并基于响应特征分析不同转速下的动力学行为。同时,结合坎贝尔图与谐响应分析进行验证。结果 研究表明,各辊在大多数转速下振动较稳定,在特定转速附近振动呈现不规则特征且振幅明显增大。上瓦楞辊在120、180 rad/s,下瓦楞辊在180、330 rad/s,光辊在60、90、105 rad/s附近出现明显异常。上述结果与传统方法预测的临界转速基本一致。结论 通过对单面机辊系振动响应的分析,能够有效识别其共振转速区间,结果与传统方法具有良好一致性,可为设备运行参数优化与振动控制提供参考。
Abstract
The work aims to study the resonance characteristics in response to the resonance phenomenon that may occur during the operation of the roll system of the single-sided machine and its adverse effects on the forming quality of corrugated board and the structural safety of the equipment, identify the key resonance speed points to provide a basis for the operation parameter optimization and equipment commissioning of the single-sided machine, and improve the equipment operation stability and product quality. A finite element models of the upper corrugating roller, the lower corrugating roller and the smooth roller were established, and the multi-speed transient dynamic simulation was carried out to obtain the vibration response time series. The dynamic behavior at different speeds was analyzed based on the response characteristics, and verified by combining Campbell diagram and harmonic response analysis. The research showed that the vibration of each roller was stable at most speeds, and the vibration near a specific speed showed irregular characteristics and the amplitude increased significantly. The upper corrugating roller was at 120 rad/s and 180 rad/s, the lower corrugating roller was at 180 rad/s and 330 rad/s, and the smooth roller was obviously abnormal near 60 rad/s, 90 rad/s and 105 rad/s. The above results were basically consistent with the critical speed predicted by the traditional method. Through the analysis of the vibration response of the roller system of the single-sided machine, the resonance speed range can be effectively identified, and the results are in good agreement with the traditional methods, which can provide reference for the optimization of equipment operation parameters and vibration control.
关键词
单面机 /
共振转速 /
振动特性 /
动力学仿真 /
运行稳定性
Key words
single-sided machine /
resonant speed /
vibration characteristics /
dynamic simulation /
operational stability
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基金
广东省普通高校新一代信息技术重点领域专项（2021ZDZX1057）; 佛山市南海区2022年重点领域科技攻关项目（2230032004654）
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