Characteristic Analysis and Optimum Design of Small Size Fluid Film Bearing Spindle Subjected to External Vibrations

本研究的目的是利用最佳化设计方法，改善小型油膜轴承主轴的特性。本文首先建立了油膜轴承主轴的振动分析模型，然后利用优化设计方法计算了设计变量的最优组合。从优化设计结果中发现，轴承槽深公差对振动特性的影响较大，采用无公差优化设计方法存在接触危险。并进行了实验验证，理论结果与实验结果吻合较好。

The objective of this research work is to improve the characteristics of small size fluid film bearing spindle by using the optimal design method. In this study, firstly a vibration analysis model of fluid film bearing spindle are made and then the optimum combination of design variables are calculated using the optimal design method. From the results of optimum design, it is found that the influence of tolerance of the bearing groove depth on vibration characteristics and there is danger of contact using the optimal design method without tolerance. Moreover, the experimental verification is conducted and good agreements are seen between the theoretical results and experimental ones.