磁流变弹性体
传递率(结构动力学)
隔振
刚度
隔离器
结构工程
工程类
材料科学
振动
磁流变液
电子工程
物理
声学
阻尼器
作者
Dingxin Leng,Xu Zhou,Wenhao Feng,Donghong Ning,Guijie Liu
标识
DOI:10.1088/1361-665x/ada7af
摘要
Abstract This paper presents a field-tunable quasi-zero stiffness vibration isolator (QZS-VI), which is beneficial for broadening the frequency bandwidth for low-frequency mitigation. The proposed QZS-VI was constructed by embedding a magnetorheological elastomer (MRE) device into an X-shaped QZS-VI system, which fulfills the tuning capability of vibration isolation. The MRE-based X-shaped system provides tunable negative stiffness, and a vertical spring supports the isolated loadings. The restoring force and stiffness of MRE-based QZS-VI is theoretically investigated, by which the field-induced QZS range (especially a large QZS range in high current values) is analyzed. A dynamic model of MRE-based QZS-VI is established and its isolation performance is numerically studied. The results show that, by controlling the current in the MRE device coil, the system transmissibility can be greatly reduced when the isolation system is under multi-frequency excitation. Furthermore, a prototype of MRE-based QZS-VI is developed, and the verification experiment is conducted. The proposed MRE-based QZS-VI system may be considered as a controllable vibration isolation candidate for random low-frequency excitation.
科研通智能强力驱动
Strongly Powered by AbleSci AI