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Compound Mass Liquid Column Damper for Attenuating the Vibration of the Structures
Technical Paper
2020-01-5047
ISSN: 0148-7191, e-ISSN: 2688-3627
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Event:
Automotive Technical Papers
Language:
English
Abstract
This study deals with the mitigation of the vibration of the structure using a
compound mass liquid column damper (MLCD). To study the damping efficiency of
the MLCD, the mathematical model of the single degree of freedom structure
integrated with MLCD including the damping due to the moving mass in the
horizontal portion of the damper is derived. The equivalent-damping factor of
the MLCD is determined by simulating the interaction between the moving mass and
the liquid using the fluid-structure interaction (FSI) technique. A 3D FSI model
is solved numerically using the ANSYS Workbench-CFX package. The global search
optimization algorithm is applied to find the optimum tuning frequency and the
optimum mass diameter ratio over a wide range of mass ratio and excitation
amplitude. The optimization issue is solved with considering the limits of the
maximum displacement of the liquid and the mass. Design charts for the optimum
parameters and their corresponding performance index for the mass ratio from 3%
to 10% and excitation intensity from 0.1% to 2% are presented. The results
obtained show that the efficiency of the MTCD to mitigate the structure
vibration is higher than that for the traditional liquid damper especially for
excitation intensity factor over than 1 %. The efficiency of the MLCD to reduce
the structure vibration reached about 95% using the proposed optimum
parameters.
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Authors
Citation
Younes, M., "Compound Mass Liquid Column Damper for Attenuating the Vibration of the Structures," SAE Technical Paper 2020-01-5047, 2020, https://doi.org/10.4271/2020-01-5047.Also In
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