입자 충돌 댐퍼를 장착한 시스템의 진동 해석 및 실험

Abstract

A particle impact damper (PID), one of the most effective passive dampers, is introduced in this study, and an algorithm to simulate the behavior of a system with PID is proposed. The PID suppresses the vibration of a structure by attaching a container with multiple particles inside to the area where the largest amplification occurs. When the system vibrates, the particles inside the container move freely, and the kinetic energy is attenuated due to collisions between the container and the particles and between the particles. The discrete-time state-space equation is used to develop a computer algorithm that simulates the motion of the system with the PID, with the particles aligned in a row. A free vibration experiment of a single degree of freedom system with PID is performed to validate the algorithm's performance. The displacements of the system and particles are measured through the free vibration experiments and compared with simulation results. There is good agreement between experimental data and simulation results.