柔性铰链近场超声悬浮滑块动特性系数研究

doi:10.3901/JME.2018.19.096

机械工程学报 ›› 2018, Vol. 54 ›› Issue (19): 96-101.doi: 10.3901/JME.2018.19.096

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柔性铰链近场超声悬浮滑块动特性系数研究

马希直, 霍波波, 李苗苗

南京航空航天大学机电学院南京 210016

收稿日期:2017-02-18 修回日期:2017-08-19 出版日期:2018-10-05 发布日期:2018-10-05
通讯作者: 马希直(通信作者),男,1964年出生,博士,副教授。主要研究方向为流体润滑理论。E-mail:meexzma@nuaa.edu.cn
基金资助:
国家自然科学基金资助项目（51475229）。

Research on the Dynamic Characteristics of NUSL Flexible Hinge Slider

MA Xizhi, HUO Bobo, LI Miaomiao

School of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016

Received:2017-02-18 Revised:2017-08-19 Online:2018-10-05 Published:2018-10-05

摘要/Abstract

摘要： 应用可压缩气体动力润滑理论建立了柔性铰链超声挤压膜滑块的动、静特性系数模型，并应用数值方法对模型进行求解，获得了高频激励条件下柔性铰链气体挤压膜滑块的动、静特性系数。讨论了悬浮高度、激励振幅以及激励频率对动特性系数的影响。根据分析发现，这些参数都对挤压膜特性有着显著的影响。悬浮高度越高，挤压膜刚度和阻尼越小。激励振幅越大，挤压膜刚度和阻尼越大。而频率的影响几乎呈线性关系，频率越高，刚度和阻尼越大，挤压膜刚度和阻尼都随着频率的增加而增加，最后对这种结论进行了解释。

关键词: 超声近场悬浮, 动特性系数, 气体挤压膜, 柔性铰链

Abstract: A complete analytical model of the static and dynamic characteristics of an ultrasonic flexible hinges squeeze film bearing is established on the basis of the compressible gas hydrodynamic lubricating theory. With the nonlinear numerical methods model is solved. Dynamic characteristics of the air ultrasonic squeeze film at specific cases are obtained, and the effects of the exciting amplitude, frequency and film thickness on dynamic characteristics are discussed. According to the results evaluated, exciting amplitude, frequency and film thickness influence the dynamic properties significantly. The dynamic characteristics increase with the increase of exciting amplitude and frequency, while the dynamic characteristics of air ultrasonic squeeze film decrease with the increase of film thickness. The effect of frequency is almost linear. The exciting frequency is higher, the stiffness and the damping is bigger. The stiffness and damping of the squeeze film increase with the increase of frequency. The reasons leading the results are presented.

Key words: dynamic characteristics, flexible hinge, gas squeeze film, near field ultrasonic levitation

中图分类号:

TH117

马希直, 霍波波, 李苗苗. 柔性铰链近场超声悬浮滑块动特性系数研究[J]. 机械工程学报, 2018, 54(19): 96-101.

MA Xizhi, HUO Bobo, LI Miaomiao. Research on the Dynamic Characteristics of NUSL Flexible Hinge Slider[J]. Journal of Mechanical Engineering, 2018, 54(19): 96-101.

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柔性铰链近场超声悬浮滑块动特性系数研究

Research on the Dynamic Characteristics of NUSL Flexible Hinge Slider

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