摘要
针对航天器中一些部件具有频率低、位移小、加速度小的振动特征,设计了专门的实验台,研究了一种结构简单的磁性液体阻尼减振器.在减振过程中,该磁性液体阻尼减振器的能量主要通过摩擦和永磁铁吸附磁性液体的弹性变形来耗散.根据能量耗散机理,通过实验研究分析了磁性液体的种类、体积及永磁铁的形状等因素对磁性液体阻尼减振器减振效果的影响.研究结果表明,在煤油基磁性液体中,柱状磁铁的减振时间随着磁性液体体积的增加而减少;环状磁铁的减振时间随磁性液体体积的增加而减少;在机油基磁性液体中,柱状磁铁的减振时间随着磁性液体体积的增加而增加,环状磁铁的减振时间随着磁性液体体积的增加而减少.
Considering that the vibration of some spacecraft components has the characteristics of microdisplacement and micro-acceleration and low frequency, a special test-bed was designed to study a magnetic fluid damper with simple structure. During the process of dampering, the main ways of energy dissipation are the friction function liquid and the elastic deformation of magnetic liquid adsorbed by permanent magnet. According to this energy dissipation mechanism, a series of experiments were carried out to explore and analyze the factors including the type of magnetic fluid, magnetic fluid volume and the shape of permanent magnet that affect the damping effect of the damper. Test results show that： ①The damping time of columnar and ring-shaped magnet decreases with the addition of kerosenebased magnetic fluid volume. ②The damping time of columnar magnet increases with the addition of engine oil-based magnetic fluid volume. ③The damping time of ring-shaped magnet decreases with the addition of engine oil-based magnetic fluid volume.
出处
《北京交通大学学报》
CAS
CSCD
北大核心
2012年第1期135-139,共5页
JOURNAL OF BEIJING JIAOTONG UNIVERSITY
基金
磁性液体阻尼减振器工程样机研制项目资助(0903)
