Galloping suppression of a suspended cable with wind loading by a nonlinear energy sink
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In this paper, an adaptive and passive galloping suppression of a suspended linear cable is investigated. The limit cycle oscillation (LCO) of cable due to nonlinear wind loading is effectively eliminated by a lightweight, easy-to-make attachment: nonlinear energy sink (NES). Analytical mechanism of LCO is explored by using harmonic balance method, implying that NES is valid for LCO suppression under any wind speed. Finally, the influences of mass ratio, damping, stiffness and location of NES on vibration suppression are highlighted in detail.
KeywordsSuspended cable Nonlinear energy sink Wind loading Galloping Vibration suppression
This study is funded by the National Natural Science Foundation of China (Grant No. 11302145), Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20130032120035) and Tianjin Research Program of Application Foundation and Advanced Technology (Grant No. 15JCQNJC04900).
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