- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHANG Ming, LI Hongtao, CUI Haodong, SUN Feng, XU Fangchao, ZHANG Lei. Modeling and Characteristic Analysis of an Electromagnetic Isolation System with High Static Stiffness and Low Dynamic Stiffness[J]. Journal of Southwest Jiaotong University, 2024, 59(4): 858-866. doi: 10.3969/j.issn.0258-2724.20230365
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Traditional linear vibration isolation system fails to achieve a lower initial vibration isolation frequency after setting the dimensional parameters. To address this issue, this article presented an electromagnetic vibration isolation system with variable stiffness based on the structure of a permanent magnet nested in an electromagnetic coil. To be specific, the system was characterized by high static stiffness and low dynamic stiffness. The mathematical model of the magnetic force of the system was created using the molecular current method. In addition, the strongly nonlinear dynamic model of the single-degree-of-freedom passive vibration isolation system was established by fully considering the quadratic and cubic nonlinear stiffness terms in the mechanical model of the vibration isolation system. The article used the incremental harmonic balance (IHB) method to solve the dynamic model and analyze the influence of excitation, current, and other factors on the displacement transmissibility of the system. An experimental test system was then created to validate the effectiveness of the proposed vibration isolation system. The experimental results and theoretical calculation demonstrate that the initial vibration isolation frequency of the system is reduced by 19.25% after introducing the current. This expands the frequency range of vibration isolation and improves system adaptability to different vibration sources.
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