A tunable high-static-low-dynamic stiffness vibration isolator
A tunable high-static-low-dynamic stiffness vibration isolator
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DOI：
10.1016/j.jsv.2009.11.001
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发表时间：
2010-04-26
影响因子：
4.7
通讯作者：
Liu, K.
中科院分区：
文献类型：
--
作者：
Zhou, N.;Liu, K.
本文研制了一种新型隔振器。所研制的隔振器具有高静低动刚度（HSLDS）的特性，可以被动或半主动工作。通过将机械弹簧与由一对电磁铁和永磁体构成的磁弹簧并联连接，获得了隔离器的HSLDS特性。机械弹簧是一种结构梁，其刚度表现为硬化行为。磁弹簧的刚度可以是正的或负的，这取决于电流到电磁铁的极性。当电磁铁电流为零时，得到无源HSLDS隔离器。在刚度特性研究中，建立了各弹簧的解析模型，确定了各弹簧的调优参数。利用刚度模型，对设计优化问题进行了研究。在实验研究中，对该隔振器的隔振效果进行了验证。实验验证了隔离器的解析固有频率。在被动模式和半主动模式下，测量了位移传递率与激振频率的关系。研究了隔离器的在线调谐能力。2009爱思唯尔有限公司版权所有。
In this study, a novel vibration isolator is developed. The developed isolator possesses the characteristics of high-static-low-dynamic stiffness (HSLDS) and can act passively or semi-actively. The HSLDS property of the isolator is obtained by connecting a mechanical spring, in parallel with a magnetic spring that is constructed by a pair of electromagnets and a permanent magnet. The mechanical spring is a structural beam whose stiffness exhibits a hardening behavior. The stiffness of the magnetic spring can be positive or negative, depending on the polarity of the current to the electromagnets. A passive HSLDS isolator is obtained when the electromagnet current is zero. In the stiffness characterization study, the analytical model for each of the springs is established and the tuning parameters are identified. Using the stiffness models, the design optimization issues are investigated. In the experimental study, the effectiveness of the isolator for vibration isolation is tested. The analytical natural frequencies of the isolator are validated experimentally. The relationships between the displacement transmissibility and the exciting frequency are measured both under the passive mode and under the semi-active mode. The on-line tuning capability of the isolator is investigated. (C) 2009 Elsevier Ltd. All rights reserved.