Research on influence of energy loss characteristics of marine particle damping
As an important way to suppress low-frequency vibration,particle damping technology can be applied to suppress low-frequency vibration of ships.In order to further study the energy dissipation mechanism of particle dampers,this paper studies the motion state and energy consumption of the particle damper at different amplitudes,different filling ra-tios,and different vibration frequencies based on discrete element method.The results show that when the particle filling ra-tio is 50％,the motion state of the particles is relatively abundant when the particles are excited at different vibration frequen-cies and amplitudes,and irregular energy consumption occurs.When the filling ratio is 70％and 90％,the energy consump-tion of the particles increases with the increase of the amplitude and frequency of vibration,especially when the particle filling ratio is 70％,the vibration frequency is 120 Hz,and the amplitude is 5 mm,the particle energy consumption reached its peak.In terms of loss factor,the 90％filling ratio is significantly higher than the 50％and 70％filling ratios when the amplitude is 1 mm-4 mm.At an amplitude of 5 mm,the 90％filling ratio was lower than that of the 70％filling ratio and higher than that of the 50％filling ratio.
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