以矿物油碟式分离机的关键部件主轴为研究对象,通过建立主轴有限元模型,进行模态分析,得到主轴前10阶模态固有频率。在此基础上进行了谐响应分析,得到23.5 Hz、133 Hz、400 Hz、931 Hz这4种频率下的位移和应力情况。模拟结果表明,在工作转速时,最大弯曲应力和位移都满足要求,没有发生共振现象。 Taking the main shaft of the mineral oil disc separator as the research object, the modal analysis of the spindle finite element model was established, and the first 10 modes natural frequency of the main shaft was obtained. On this basis, the harmonic response analysis was carried out, and the displacement and stress under the four frequencies of 23.5 Hz, 133 Hz, 400 Hz and 931 Hz were obtained. The simulation results show that the maximum bending stress and displacement meet the requirements at the operating speed, and no resonance phenomenon occurs.