Comparative study of the damping performance of concentrated masses and particle dampers based on cantilever beams

This paper investigates the damping performance of the main structure with a concentrated mass and particle dampers at different particle filling rates and sinusoidal sweep amplitudes under the same mass ratio by means of a controlled experiment, with the concentrated mass and particle dampers attached to the free end of the cantilever beam. As the order increases, the effect becomes progressively weaker. For cantilevered beam structures, a reasonable design with only a small mass ratio of particle dampers can effectively suppress the vibration of the first order. For the second- and third-order bending vibration, particle dampers with high mass ratios show a better damping effect, and when the strength of the excitation reaches a certain value, the damping performance of the particle dampers is basically better than that of the concentrated mass under the same conditions. The reason for this is that particle damping not only dampens the vibration by tuning the mass but also dissipates the energy of the main structure by means of collisions, impacts, and friction between the particles or between the particles and the damper cavity.