Summary A novel axial eddy current damper by using rack and gear mechanism (RGA‐ECD) was proposed. A 500 kN RGA‐ECD prototype was manufactured and tested, and its nonlinear damping performance was systematically studied. First, the configuration of the RGA‐ECD was introduced in detail, and its axial force was theoretically derived. Second, an RGA‐ECD prototype with a target damping force of 500 kN at the velocity of 0.5 m/s was designed and manufactured, and a series of tests on the prototype were conducted. In the test, the maximum damping force of this prototype is 507 kN at the velocity of 0.509 m/s, which achieves the design goal. It appears that the tested results are in good agreement with the numerical results obtained from COMSOL Multiphysics when the loading velocity is less than 0.377 m/s. When the loading velocity is greater than 0.377 m/s, the maximum relative difference between the tested and numerical results is within 10.8%. The hysteresis curves of the prototype are relatively smooth, and the repeatability is also excellent, which indicates that the mechanical properties of the RGA‐ECD are considerably stable and reliable. Third, the effectiveness of the RGA‐ECD in mitigating seismic responses of base isolated structures was investigated by comparing it with fluid viscous damper. The results show that the RGA‐ECD can be adopted as an alternative to the fluid viscous damper for seismic vibration control, and there is a force‐limiting characteristic for the RGA‐ECD, which can prevent the damage of the damper and controlled structure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.