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Nonlinear analysis of vibration attenuation of ring-spring-resonator based meta-isolation system
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Highlights Ring-spring-resonator based nonlinear meta-isolation system was proposed. Vibration attenuation of meta-isolation system was revealed experimentally. Nonlinear meta-isolation system exhibits more excellent vibration attenuation. A nonlinear model was proposed for nonlinear vibration attenuation analysis.
Abstract Ring-spring-resonator (RSR) based nonlinear meta-isolation system (RSR-M) was proposed and its vibration attenuation characteristic was investigated experimentally and theoretically. The force–displacement hysteresis loops of the selected wire rope isolators (WRIs) exhibit softening under compression and hardening under extension, and are identified by a modified mathematical model combined with the normalized Bouc-Wen model. Frequency response curves of conventional isolation system and RSR-M−2 were calculated based on the single-degree-of-freedom (SDOF) and two-degree-of-freedom (TDOF) models, along with the fourth-order Runge-Kutta method. Shaking table experiments were carried out to evaluate the nonlinear dynamic response and vibration attenuation property of the RSR-M, which proves to be in good agreement with the numerical results of acceptable validity. Dynamic hysteresis loops and phase portraits were plotted to study the dynamic responses and stability of the RSR-M. The experimental results show that, no matter vertical or horizontal direction, the RSR-M possesses better vibration attenuation performance compared to conventional isolation system. In general, the meta-isolation vibration system provides a new reference and idea for the practice designing of the isolation system in some sense.
Nonlinear analysis of vibration attenuation of ring-spring-resonator based meta-isolation system
Graphical abstract Display Omitted
Highlights Ring-spring-resonator based nonlinear meta-isolation system was proposed. Vibration attenuation of meta-isolation system was revealed experimentally. Nonlinear meta-isolation system exhibits more excellent vibration attenuation. A nonlinear model was proposed for nonlinear vibration attenuation analysis.
Abstract Ring-spring-resonator (RSR) based nonlinear meta-isolation system (RSR-M) was proposed and its vibration attenuation characteristic was investigated experimentally and theoretically. The force–displacement hysteresis loops of the selected wire rope isolators (WRIs) exhibit softening under compression and hardening under extension, and are identified by a modified mathematical model combined with the normalized Bouc-Wen model. Frequency response curves of conventional isolation system and RSR-M−2 were calculated based on the single-degree-of-freedom (SDOF) and two-degree-of-freedom (TDOF) models, along with the fourth-order Runge-Kutta method. Shaking table experiments were carried out to evaluate the nonlinear dynamic response and vibration attenuation property of the RSR-M, which proves to be in good agreement with the numerical results of acceptable validity. Dynamic hysteresis loops and phase portraits were plotted to study the dynamic responses and stability of the RSR-M. The experimental results show that, no matter vertical or horizontal direction, the RSR-M possesses better vibration attenuation performance compared to conventional isolation system. In general, the meta-isolation vibration system provides a new reference and idea for the practice designing of the isolation system in some sense.
Nonlinear analysis of vibration attenuation of ring-spring-resonator based meta-isolation system
Shi, Dongyu (author) / Chen, Hailong (author) / He, Huguang (author) / Li, Yu (author) / An, Xiyue (author) / Jin, Fengnian (author) / Fan, Hualin (author)
Engineering Structures ; 292
2023-06-22
Article (Journal)
Electronic Resource
English
| European Patent Office | 2020