Characteristic analysis and experimental study of a high-static-low-dynamic-stiffness vibration isolation system with adjustable negative stiffness

被引：0
|
作者：
Su P. [1 ]
Wu J.-C. [1 ]
Liu S.-Y. [1 ]
Chang G.-H. [1 ]
Zhang Y.-C. [1 ]
机构：
[1] College of Power Engineering, Naval University of Engineering, Wuhan
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2023年 / 27卷 / 11期
关键词：
amplitude-frequency characteristic; averaging method; electromagnetic negative stiffness element; force transmissibility; high-static-low-dynamic-stiffness;
D O I：
10.3969/j.issn.1007-7294.2023.11.011
中图分类号：
学科分类号：
摘要：
Aiming at the problem that the design parameters of the existing high-static-low-dynamic-stiffness vibration isolators are fixed and the magnetic negative stiffness mechanism cannot be adjusted on line, a new type of electromagnetic vibration isolator with adjustable negative stiffness was designed by using permanent magnet and helical coil, and the finite element simulation analysis was carried out. Through static analysis, the mathematical expressions of force-displacement-current and stiffness-displacement-current were deduced, and the condition for the system to obtain quasi-zero stiffness characteristics at the equilibrium position was obtained.A dynamic model of the vibration isolation system with high-static-low-dynamic-stiffness was established, and the effects of different parameters on the amplitude-frequency characteristic and force transmissibility were studied by using the averaging method. The principle prototype was developed, and the test bench was built. The vibration isolation performance test was carried out. The results show that the new isolator has a wider effective vibration isolation frequency range and a lower peak transmissibility. © 2023 China Ship Scientific Research Center. All rights reserved.
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页码：1697 / 1706
页数：9
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