Innovative Hamburger-Shaped Eddy Current Damper Designed for Wind-Induced Vibration Control of Civil Structures
Publication: Journal of Structural Engineering
Volume 150, Issue 9
Abstract
In this paper, an innovative hamburger-shaped eddy current damper (HSECD) is presented to mitigate the responses of civil structures subjected to wind excitations. The damper’s capacity to dissipate energy is significantly enhanced through a two-phase configuration of permanent magnets (PMs) and two transmission devices: a ball-screw assembly and a bevel gear group. The improved eddy current damper (ECD) solves the problem that the low damping density of traditional ECDs hinders their application to the field of vibration control for civil structures. First, the construction details of this novel HSECD are elaborated, and its principle is discussed through theoretical analysis and numerical simulation. Subsequently, a prototype of the HSECD was fabricated, and cyclic tensile–compressive tests were conducted to investigate its mechanical performance. Furthermore, the temperature effect on the damper’s maximum output force was analyzed, and more than 10% performance degradation was detected in tests with a continuous loading of 1,250 s, while the damper performance quickly reached a steady state after a certain decline. A theoretical model of the HSECD was then established to simulate its hysteretic characteristics, and the accuracy was verified by comparing it with the test data, where their energy error was only 1.9%. Finally, the application of the HSECD to both a single-degree-of-freedom (SDOF) simplified system and a jacking engineering system demonstrates its excellent control performance because the reduction ratios of their peak displacement were as high as 31.1% and 40.9%, respectively. These results highlight the significant practical value of the HSECD in mitigating the wind-induced vibrations for engineering structures.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was supported by the National Natural Science Foundation of China (Grant Nos. 52027811 and 52078104).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 150 • Issue 9 • September 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Sep 24, 2023
Accepted: Feb 29, 2024
Published online: Jun 21, 2024
Published in print: Sep 1, 2024
Discussion open until: Nov 21, 2024
ASCE Technical Topics:
- Business management
- Coastal engineering
- Coastal processes
- Coasts, oceans, ports, and waterways engineering
- Continuum mechanics
- Damping
- Dynamics (solid mechanics)
- Eddy (fluid dynamics)
- Engineering mechanics
- Forces (type)
- Hydraulic engineering
- Hydraulic structures
- Innovation
- Motion (dynamics)
- Ocean currents
- Practice and Profession
- Solid mechanics
- Structural control
- Structural dynamics
- Structural engineering
- Structural health monitoring
- Vibration
- Water and water resources
- Wind forces
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