Effects of micron–nano composite iron particle powders on the tribological properties of magnetic fluids used for a nonlinear energy sink vibration absorber

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-disperse...

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Veröffentlicht in:Physics of fluids (1994) 2023-09, Vol.35 (9)
Hauptverfasser: Nie, Songlin, Gong, Fei, Ji, Hui, Zhang, Le, Ma, Zhonghai, Yin, Fanglong
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:1070-6631
1089-7666
DOI:10.1063/5.0168499