某机床计算模态分析及其实验验证

发布时间：2018-06-21 06:24

本文选题：机床 + 模态分析　；参考：《组合机床与自动化加工技术》2017年02期

【摘要】：为了优化机床的动态性能,进一步提高机床的加工精度和加工效率,分别利用计算模态分析方法和实验模态分析的方法对一数控机床的动态特性进行了研究。得到了该机床的前三阶模态的固有频率,阻尼比和振型。通过对计算和实验结果的对比分析发现前三阶固有频率误差分别为8.7%,9.8%和8.1%,阻尼比误差分别为18%,9.3%和17%,模态振型基本一致。发现在低阶时计算模态分析准确度较高,该机床的薄弱环节为其立柱。提出的方法和得到的结论可应用于机床动态特性的设计与研究中。
[Abstract]:In order to optimize the dynamic performance of the machine tool and further improve the machining accuracy and efficiency of the machine tool, the dynamic characteristics of a numerical control machine tool were studied by using the computational modal analysis method and the experimental modal analysis method respectively. The natural frequencies, damping ratios and modes of the first three modes of the machine are obtained. It is found that the first three natural frequency errors are 8.79.8% and 8.1%, the damping ratio errors are 189.3% and 17%, respectively, and the modal modes are basically the same. It is found that the accuracy of calculation modal analysis is high at low order, and the weak link of the machine tool is its column. The proposed method and conclusions can be applied to the design and study of the dynamic characteristics of machine tools.
【作者单位】：华南理工大学广州学院汽车与交通工程学院;
【基金】：广东省质量工程项目(51-SC150201) 华南理工大学广州学院青年科研基金项目(XQ114016)
【分类号】：TG502

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