Zhu Chang-sheng
College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China.
J Zhejiang Univ Sci. 2003 Sep-Oct;4(5):514-9. doi: 10.1631/jzus.2003.0514.
A disc-type magneto-rheological fluid damper operating in shear mode is proposed in this paper, which is based on the special characteristics of the magneto-rheological (MR) fluid with rapid, reversible and dramatic change in its rheological properties by the application of an external magnetic field. The magnetic field of the disc-type MR fluid damper is analysed by the finite element method; the controllability of the disc-type MR fluid damper on the dynamic behaviour of a rotor system; and the effectiveness of the disc-type MR fluid damper in controlling the vibration of a rotor system, are studied in a flexible rotor system with an over-hung disc. It is shown that the magnetic flux density of the disc-type MR fluid damper in the working areas can significantly change with the applied current in the coil; and that the dynamic behavior of the disc-type MR fluid damper can be varied by the application of an external magnetic field produced by a low voltage electromagnetic coil. The disc-type MR fluid damper can significantly change the dynamic characteristics of a rotor system, provided that the location of the disk-type MR fluid damper is carefully chosen. The disc-type MR fluid damper is a new actuator with good dynamic characteristics for rotating machinery.
本文提出了一种工作在剪切模式下的盘式磁流变液阻尼器，它基于磁流变（MR）液的特殊特性，即通过施加外部磁场，其流变特性会迅速、可逆且显著地变化。采用有限元方法分析了盘式磁流变液阻尼器的磁场；在一个带有悬臂盘的柔性转子系统中，研究了盘式磁流变液阻尼器对转子系统动态行为的可控性以及盘式磁流变液阻尼器在控制转子系统振动方面的有效性。结果表明，盘式磁流变液阻尼器工作区域的磁通密度会随着线圈中施加的电流而显著变化；并且通过由低压电磁线圈产生的外部磁场的施加，盘式磁流变液阻尼器的动态行为可以改变。只要精心选择盘式磁流变液阻尼器的位置，它就能显著改变转子系统的动态特性。盘式磁流变液阻尼器是一种用于旋转机械的具有良好动态特性的新型执行器。
