Abstract
This paper introduces a novel design of magnetic negative stiffness dampers (MNSDs) and its application to vibration suppression for stay cables. The MNSDs are composed of a number of permanent magnets properly arranged in a conductive pipe, and such configurations efficiently integrate fully passive negative stiffness mechanism and eddy-current damping in a simple and compact design. When applied to vibration suppression of stay cables, MNSDs can achieve control performance comparable to semi-active or active control. The installation of MNSD can provide considerably high damping to cable structures. Negative stiffness springs may amplify local vibration amplitude at the damper location, through which the locking effect can be overcome and significant kinetic energy can be dissipated by viscous damping. Optimal damping performance corresponding to a certain value of negative stiffness can be obtained if the damper's damping coefficient is tuned properly.
| Original language | English |
|---|---|
| Journal | International Conference on Advances in Experimental Structural Engineering |
| Volume | 2015-August |
| Publication status | Published - 1 Jan 2015 |
| Event | Joint 6th International Conference on Advances in Experimental Structural Engineering, AESE 2015 and 11th International Workshop on Advanced Smart Materials and Smart Structures Technology, ANCRiSST 2015 - Urbana-Champaign, United States Duration: 1 Aug 2015 → 2 Aug 2015 |
Keywords
- Magnetic stiffness damper
- Optimal damping ratio
- Stay cable
- Vibration mitigation
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction