Journal
PHYSICS OF FLUIDS
Volume 35, Issue 9, Pages -Publisher
AIP Publishing
DOI: 10.1063/5.0168499
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This study developed a novel magnetic compound fluid (MCF) to create a magnetic fluid nonlinear energy sink (MF-NES) with optimum energy consumption efficiency. By mixing differently sized iron particles, the friction coefficient was reduced, significantly enhancing the effectiveness and sensitivity of the MF-NES mechanism, particularly in response to low-frequency vibrations.
Low-frequency vibration control is a crucial challenge within the realm of fluid physics, and in this paper, a novel magnetic compound fluid (MCF) has been developed to produce a magnetic fluid nonlinear energy sink (MF-NES) with optimum energy consumption efficiency. The mixed doping of bi-dispersed nano-sized iron particles (NIPs) and micrometer-sized carbonyl iron particles (CIPs) can generate a load-bearing structure between the inertial mass and the MF-NES shell with a reduced friction coefficient. The effectiveness and sensitivity of the MF-NES mechanism is significantly enhanced, particularly in responding to low frequency vibrations. To predict and quantify the friction coefficient of the MF, a novel hybrid approach combining data handling and a genetic algorithm model was developed and rigorously validated through empirical data obtained from the experiments and demonstrated that the bi-dispersed NIPs/CIPs MCF had a notably lower friction coefficient, making it adept at responding to low-frequency and even ultra-low-frequency vibrations.
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