中速磨煤机-基础耦合体系振动测试与减振研究(Ⅱ)——有限元分析

Vibration test and shock absorption research on medium-speed mill-foundation coupled system(Ⅱ)——Finite element analysis

根据中速磨煤机现场振动测试数据,采用ANSYS程序建立中速磨煤机-基础耦合体系的有限元模型,分别进行了弹簧隔振基础和非隔振基础中速磨煤机的模态分析和谐响应分析。有限元计算结果和现场测试结果基本一致。分析了隔振器数量、基础台板与磨煤机质量比对磨煤机振动的影响,探讨了中速磨煤机减振的措施。研究表明,应该建立中速磨煤机-基础耦合体系模型进行振动计算。为了达到良好的隔振效果,建议将中速磨煤机弹簧隔振基础的最大水平振动位移控制为50μm,质量比控制为3.0±0.2。

According to the vibration test data of medium-speed mill,a mill-foundation coupled finite element model is established using ANSYS.The modal and harmonic response of medium-speed mill with spring vibration-isolated foundation and non-isolated vibration foundation are analyzed.The calculation results are basically in accordance with the test results.The influence of the number of vibration isolator and the ratio of foundation bedplate to equipment on the vibration of mill is analyzed.The shock absorption measures of medium-speed mills are discussed.The study shows that medium-speed mill-foundation coupled system model should be established for vibration calculation.To get good vibration isolation effect,the maximum horizontal vibration displacement of medium-speed mill with spring vibration-isolated foundation is suggested as 50μm,and the ratio of foundation bedplate to equipment as 3.0±0.2.