Investigation on the influence of the structural characteristics of particle dampers on its damping performance

Abstract

Under the condition of vertical harmonic excitation, the influence of two structural characteristics of the damping rod and the inner wall on the damping characteristics of the damper is studied. The force signal and acceleration signal of the damper under different excitation conditions are measured through experiments.The damping characteristics such as effective mass, loss power and loss factor of the damper are analyzed by the steady-state energy flow method. The experiment results indicate that, on the basis of ordinary particle dampers, adding damping rods can intensify the friction and extrusion of particles and rods, thereby enhancing the energy dissipation performance. By pasting rubber material on the inner wall of the damper, the soft inner wall can consume the acoustic energy during collision, enhance the energy consumption during collision, and improve the damping effect.

Experimental study on damping characteristics of the particle dampers with damping rod and soft inside wall

“…The steady-state energy flow method can be used to calculate the steady-state input power of the system [1]. For harmonic excitation, the input power P in can be obtained from the following equation.…”

“…A soft inside wall particle damper with a damping rod is a passive vibration control technology [1]. It utilizes the collision, extrusion, and friction between particles and the damping rod and soft wall surface during the vibration process of the system to convert the mechanical energy of the system into heat energy and sound energy, resulting in the damping effect, thus significantly improving the damping of the system structure.…”