A new type of vibration isolator based on magnetorheological elastomer
A new type of vibration isolator based on magnetorheological elastomer
复制标题
DOI：
10.1016/j.matdes.2018.08.009
复制
发表时间：
2018-11-05
影响因子：
8.4
通讯作者：
Li, Lin
中科院分区：
文献类型：
--
作者：
Bastola, Anil K.;Li, Lin
在这项工作中，提出了一种基于磁流变（MR）弹性体（MRE）的新型自适应隔振器。采用一种新方法来开发这种同时施加磁场和预载的隔离器。利用磁吸引力来改变单自由度（DOF）系统中的预紧力。该系统具有这样的规定：当施加磁场时，预载将自动作用于磁流变弹性体。在这种组合载荷条件下，单个自由度系统的固有频率迅速转移到更高的频率，并且磁流变弹性体的刚度显着增加。研究发现，当施加 520 mT 的磁场时，MR 弹性体系统的刚度可增加至其原始刚度的 730 倍，这比文献报道的增强幅度明显更高。预载和磁场的综合效应是深远的，因为磁场和预载效应同时增强了磁性颗粒之间的磁相互作用。在大多数基于 MRE 的隔离器中产生更高的磁场通常是一个很大的困难。我们的研究表明，当适当的预载和适当的磁场一起应用时，即使应用相对较低的磁场强度，也可以开发出高度可调的隔离器系统。 (C) 2018 Elsevier Ltd. 保留所有权利。
In this work, a new type of adaptive vibration isolator based on magnetorheological (MR) elastomer (MRE) is presented. A new method was adopted to develop such an isolator where both a magnetic field and a preload were applied simultaneously. The magnetic attraction force was utilized to change the preload in the single degree of freedom (DOF) system. The system has such a provision that when a magnetic field is applied the preload would be automatically acting to the MR elastomer. In such a combined loading condition, the natural frequency of a single DOF system promptly shifted to a higher frequency and the stiffness of the MR elastomer was significantly increased. The stiffness of the MR elastomer system was found to be increased as high as 730 times of its original stiffness when the magnetic field of 520 mT was applied, which is a significantly higher augmentation than those reported in the literature. The combined effect of the preload and the magnetic field was profound because the magnetic interaction among the magnetic particles was simultaneously boosted by both the magnetic field and the preloading effect. It is often a large difficulty to generate a higher magnetic field in most of the MRE-based isolators. Our study showed that when a suitable preload and a suitable magnetic field are applied together, a highly tunable isolator system can be developed even with the application of a relatively lower magnetic field strength. (C) 2018 Elsevier Ltd. All rights reserved.