基于有限元气体静压主轴模态分析
卢诗毅，刘强，姚建华，刘震
（广东工业大学 机电工程学院，广东 广州 510006）
摘要：为了分析气体静压主轴的动态性能，研究气体静压主轴的设计合理性和高速稳定性，建立了气体静压轴承刚度的模型，应用FLUENT对气体静压轴承进行了流体分析，计算出了气体静压轴承的支撑刚度。在此基础上应用ANSYS Workbench对气体静压主轴进行模态分析，得到了气体静压主轴的各阶固有频率以及其相应振型。分析结果表明了气体静压主轴的共振频率随着轴承刚度的增加而增加，引起气体静压主轴的临界速度远远大于设计的最高速度，说明气体静压主轴设计是合理可靠的。
关键词：FLUENT；气体静压主轴；模态分析；ANSYS Workbench；有限元
中图分类号：O242.21 文献标志码：A doi：10.3969/j.issn.1006-0316.2017.04.005
文章编号：1006－0316 (2017) 04－0019－05
Modal Analysis of Aerostatic Spindle Based on ANSYS
LU Shiyi，LIU Qiang，YAO Jianhua，LIU Zhen
( School of Electro-mechanical Engineering, Guangdong University of Technology,Guangzhou 510006, China )
Abstract：In order to analyze dynamic performance of aerostatic spindle, study on its high-speed stability, the stiffness of aerostatic bearing model was established. The stiffness of aerostatic bearing was figured out by FLUENT which used for fluid analysis. Each natural frequency and principal mode of vibration is obtained by modal analysis of ANSYS Workbench. The results show that the resonance frequency of the aerostatic spindle increases when stiffness of the bearing increase, and resonance velocity higher than the max velocity of design. It indicates that design of aerostatic is reasonable and reliable.
Key words：FLUENT；aerostatic spindle；modal analysis；ANSYS Workbench
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收稿日期：2016－11－14
作者简介：卢诗毅（1990－），男，广东湛江人，硕士研究生，主要研究方向为超精密加工。
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