An experimental investigation of an inertial viscous damper and its damping effect on a cable

LIU Jing1,LIANG Dong1,2

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (8) : 93-101.

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PDF(1796 KB)
Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (8) : 93-101.

An experimental investigation of an inertial viscous damper and its damping effect on a cable

  • LIU Jing1,LIANG Dong1,2
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Abstract

A prototype of the inertial viscous damper for stay cables, composed of rack and pinion, inertial element, and viscous damping element, is fabricated, and detailed experimental investigation of stay cables' vibration control is carried out. A cable-damper system considering sag, internal damping characteristics, pinion's inertia, shaft's inertia, and bearing's damping characteristics was established. The numerical analysis was carried out using the Improved Galerkin method. The novel damper's performance parameters, energy dissipation capacity, and vibration control effect on cables are discussed. The comparison between experimental and numerical investigation shows that the inertial viscous damper produces apparent negative stiffness in the vibration damping of the cable, and the displacement amplification effect has a significant positive impact on the vibration damping effect. The Improved Galerkin method can be adopted in the analysis of cable-inertial viscous damper system, and the algorithm does not depend on the selection of initial values. The theoretical results are in good agreement with the experimental results, verifying the calculation method's accuracy in this study. The inertial viscous damper has a good damping effect on cable vibration.

Key words

Inertial viscous damper / Improved Galerkin's method / Numerical calculation / Cable test / Damping performance

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LIU Jing1,LIANG Dong1,2. An experimental investigation of an inertial viscous damper and its damping effect on a cable[J]. Journal of Vibration and Shock, 2022, 41(8): 93-101

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