基于ANSYS的薄膜干燥器转子系统振动特性分析

ANSYS-based vibration characteristic analysis on rotor system of film dryer

运用ANSYS软件对A=0.4 m2薄膜干燥器转子系统三维模型进行模态分析,提取转子的前4阶固有频率和振型,求得相应的临界转速;在模态分析的基础上,用Full法对转子进行谐响应振动分析,研究偏心(c=2.5 mm)与质量不平衡(m=0.1,0.2kg)对转子振动的影响,并分析不同轴承刚度对转子系统的固有频率和振动特性的影响。结果表明:偏心、不平衡质量等对转子振动响应影响较大;轴承刚度对转子固有频率和振动特性有一定影响。

The modal analysis was carried out based on the 3Dsolid model of the A=0.4 m2 film dryer rotor by the ANSYS software,the first four orders of system inherent frequencies and vibration forms were initially attained,the critical speeds of main shaft were calculated;The harmonic response analysis was carried out based on the modal analysis of the rotor by the Full method,the influence of the eccentricity（c=2.5 mm）and the unbalance mass（m=0.1,0.2kg）on the rotor vibration were analyzed,and the bearing stiffness was changed to analyze the inherent frequency and vibration characteristic of the rotor system.the results show that：the eccentricity and the unbalance mass have great influences on the rotor vibration response;the bearing stiffness has a certain effect on the inherent frequency and vibration characteristic of the rotor.