Experimental Investigation on Vibration Control of a Suspended Particle-Tuned Liquid Damper

The particle-tuned liquid damper (PTLD) can combine the functions of baffles and energy-dissipating materials, such as highly viscous liquids, by integrating the particle dampers into a conventional tuned liquid damper (TLD). However, the particles distributed only at the bottom of the container can...

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Bibliographic Details
Published inSustainability Vol. 14; no. 20; p. 13085
Main Authors Lu, Zheng, Zhou, Mengyao, Ren, Hongmei
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.10.2022
Subjects
Baffles
Construction industry
Containers
Control engineering
Dampers
Damping
Dissipation
Energy
Engineering research
Excitation
Parametric analysis
Posttransplant lymphoproliferative disorders
Seismic engineering
Seismic response
Shake table tests
Vibration
Vibration control
China
Canada
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Summary:The particle-tuned liquid damper (PTLD) can combine the functions of baffles and energy-dissipating materials, such as highly viscous liquids, by integrating the particle dampers into a conventional tuned liquid damper (TLD). However, the particles distributed only at the bottom of the container cannot drive the motion of water in the middle layer to function effectively. Therefore, a suspended particle-tuned liquid damper (SPTLD) is proposed in this study and its effectiveness and reliability are examined compared with the conventional TLD through shaking table tests. Based on the experimental results, a parametric analysis of the SPTLD is further conducted to investigate the damping mechanism of the SPTLD, including the number of particles, the excitations with various amplitudes, and the use of suspended versus floating particles in liquid. The test results revealed that SPTLD successfully controlled the structural acceleration responses under seismic excitations with good reliability; the peak acceleration response was reduced by 67.4% and the RMS value was reduced by 75.9%. In the SPTLD, the particles filled in the container can drive more liquid to effectively participate in the sloshing motion, and the superimposed damping effects involving collisions and the energy-dissipation mechanisms of buoyancy and hydraulic resistance in the SPTLD lead to an improvement in the vibration control performance. Furthermore, the comparison of SPTLD and the floating particle-tuned liquid damper (FPTLD) demonstrates the better availability of SPTLD in practical applications, especially for some slender structures with limited plane space on the top floor.
ISSN:2071-1050
2071-1050
DOI:10.3390/su142013085