空间飞行器磁性液体阻尼减振器减振性能的研究  

Damping performance of magnetic fluid dampers in spacecrafts

作　　者：朱姗姗[1,2] 李德才[1] 崔红超[1] 杨晓雪[2] 

机构地区：[1]北京交通大学机械与电子控制工程学院,北京100044 [2]北京工业职业技术学院机电工程学院,北京100042

出　　处：《振动与冲击》2017年第10期121-126,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(51375039);北京市自然基金(4142046);教育部创新团队发展计划(IRTl3046)

摘　　要：结合弹性悬臂梁的振动微分方程,根据牛顿第二定律和液体的连续性方程,设计了两种用于空间飞行器的磁性液体阻尼减振器的外形结构,分析其对减振性能的影响;并且通过采用不同直径的永磁体、不同的磁性液体饱和磁化强度、不同磁性液体注入量实验分析对比减振器的消振时间,得出不同振动频率下,永磁体直径尺寸、磁性液体饱和磁化强度以及磁性液体注入量均存在最佳值。为用于空间站飞行器中许多低频率、小位移的太阳能帆板、卫星天线的磁性液体阻尼减振器结构优化提供了一定的依据。According to the vibration differential equation of cantilever,and the continuum equation of fluid,two kinds of magnetic fluid dampers mainly used in spacecrafts were designed.It is proved that different shape of damper,different diameter of permanent magnetic,different saturated magnetization intensity of magnetic fluid and different quantity of magnetic fluid have influences on the damping performance based on the experiments for comparing the time duration for vibration vanishing.It is also concluded that the diameter of permanent magnetic,saturated magnetization intensity of magnetic fluid and quantity of magnetic fluid own their optimal values at different vibration frequency.The results provide the base for structural optimization of magnetic fluid dampers which could be of great significance for the design of spacecrafts with low frequency and small amplitude vibration.

关 键 词：磁性液体 阻尼 减振器 减振性能 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3