Study of Cable Vibration Control Based on Eddy Current Damper
Installing mechanical dampers at the ends is one of the main methods for cable vibration reduction for cable-stayed bridges.However,traditional mechanical dampers rely on liquid media.Leakage and other diseases are prone to occur after long-term service,which will affect mitigation effect that can be achieved.Eddy current dampers rely on electromagnetic effects to generate damping force without relying on liquid media,thereby avoiding leakage and other issues in mechanism.Thus,it is a reliable implementation method for suppressing cable vibration.Firstly,basic structure and mechanical model of the new eddy current damper is explored.Then,an optimization design method is established with multi-modal vibration being taken into consideration.Finally,on-site verification of the eddy current damper cable is carried out relying on a project practice,and the control effect is analyzed.The research results indicate that eddy current dampers are suitable for cable vibration reduction requirements,and the proposed design method is able to improve damping levels of multiple modes significantly.
bridge engineeringstay cableseddy current damperoptimization design methodmultiple modesdamping level
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