目的 为分析印刷机递纸滚筒在高速运行下的动态性能与共振风险,确保其工作安全与可靠。方法 基于ANSYS软件对建立的递纸滚筒的有限元模型进行模态分析,获取其前6阶固有频率与振型;同时,采用YSV测试系统与力锤激励法进行试验模态分析,通过布置加速度传感器测量振动响应,将试验结果与仿真结果对比,以验证模型准确性,并计算临界转速。结果 仿真与试验获得的固有频率相对误差均小于4%,振型吻合良好。一阶试验模态固有频率为177.75 Hz,据此计算得到一阶临界转速为10 665 r/min,该滚筒实际工作转速小于200 r/min,远低于临界转速。结论 研究验证了有限元模型的可靠性,并证实递纸滚筒在当前工作转速下运行安全,不会发生共振,满足使用要求。
Abstract
The work aims to investigate the dynamic performance and potential resonance risk of the delivery roller in printing presses under high-speed operation to ensure safe and reliable performance. A finite-element model of the roller was developed in ANSYS to obtain the first six natural frequencies and corresponding mode shapes. Experimental modal analysis was then carried out using a YSV testing system and hammer excitation, with acceleration sensors deployed to record vibration responses. The experimental results were compared with the simulation outcomes to verify the model accuracy, and the critical rotational speed was subsequently calculated. The relative error between simulated and experimental natural frequencies was found to be less than 4%, and the mode shapes exhibited good agreement. The first-order natural frequency measured in the experiment was 177.75 Hz, corresponding to a calculated first-order critical speed of 10 665 r/min. As the actual operating speed of the delivery roller was below 200 r/min, which was far lower than the critical speed. These findings validate the reliability of the finite-element model and confirm that the roller operates safely without resonance risk under current working conditions and meets practical operational requirements.
关键词
递纸滚筒 /
有限元分析 /
模态分析 /
临界转速 /
共振
Key words
paper delivery roller /
finite element analysis /
modal analysis /
critical rotational speed /
resonance.
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基金
北京印刷学院校级项目（Ea202406,KYCPT202508）; 北京市属高等学校高水平科研创新团队建设支持计划项目（BPHR20220107）
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