摘要
研究了一种以电流变液为润滑介质的静压导轨系统静动态特性。利用液阻网络理论,在分析电场强度与电流变液黏性关系,综合考虑关联参数的基础上,建立了电流变液静压导轨系统的CFD计算数值模型。根据摄动理论,利用Fluent动网格技术,研究了在不同工作变量下电流变液静压导轨的静动态特性。研究结果表明:电场强度、负载因素与初始压力比等工作变量均会对电流变液静压导轨系统性能带来影响;电场强度增强会使系统流量减小,阻尼系数增大,但不会对系统静刚度带来影响;改变切削力载荷频率,导轨系统会出现共振现象,增强电场强度可显著提高系统动刚度,抑制共振时的最大振幅。实验结果与仿真数值一致,为电流变液静压导轨的设计应用提供了理论参考依据。
The static and dynamic characteristics of a hydrostatic guideway system based on the lubricating medium of electrorheological fluid were studied.A numerical model for fluid dynamics computation was established according to the hydraulic resistance network theory and in comprehensive consideration of correlated parameters and the influence of electric field intensity on the characteristics of electrorheological fluid.The static and dynamic characteristics of the hydrostatic guideway based on the electrorheological fluid with different working variables were studied by using the fluent dynamic mesh technology and the perturbation theory.The results show that the static and dynamic characteristics of the hydrostatic guideway system can be influenced by the electric filed intensity,load factor and initial pressure ratio.The system flow rate will decrease and the damping coefficient will increase with the system stiffness remaining unchanged, when the electric filed intensity is enhanced under the condition of unchanged initially designed parameters and load factors.The resonance phenomenon of the guideway system may occur when the cutting force frequency is changed.The resonance vibration can be suppressed with the dynamic stiffness being increased significantly by enhancing the electric filed intensity.The simulation results are in agreement with the experimental results,which provides a theoretical reference to the design and application of hydrostatic guideways.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第22期24-30,共7页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(51175518)
湖南省科技型中小企业技术创新基金(12C26214305029)
关键词
静压导轨
电流变液
电场强度
静动态特性
动网格
关联参数
hydrostatic guideway
electrorheological fluid
electric field intensity
static and dynamic characteristics
dynamic mesh
correlated parameters
