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Theoretical and Experimental Parametric Study on Tuned Liquid Sloshing Damper

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This paper presents a parametric study on tuned liquid sloshing damper (TLD), which has been carried out theoretically and experimentally. Theoretically, the governing differential equation of the equivalent mechanical model is solved using Fourier expansion-based differential quadrature method. The obtained solution shows good agreement with the experimental results. Experimentally, a simple test rig is designed and constructed in order to acquire free vibration of a pendulum like platform with an attached liquid slosh damper. Different parameters, i.e. the liquid filling ratio, the liquid viscosity and the tank shapes, are studied theoretically and experimentally in order to investigate the damping capacity of the supplementary damper. It can be concluded that Fourier expansion-based differential quadrature method has been reliable and efficient in solving the proposed problem, as the liquid viscosity increases damping capacity increases for all shapes of the tanks, the rectangular tank is the most effective shape on damping capacity with respect to the considered shapes.  Filling ratio plays an important role in controlling both of settling time and damping coefficient, where 16% filling ratio provides the most damping capacity. Generally, the TLD has been more effective for structures with low damping ratios where structural acceleration decreases with the introduction of the TLD.
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Sloshing; Differential Quadrature; Free Vibration; Dynamic Response; Mechanical Model

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