Impact of Particle Packing Density on the Frequency Response of an Additively Manufactured Particle Damper

This paper explores the influence of particle packing density on the frequency response characteristics of particle dampers fabricated using Laser Powder Bed Fusion (LPBF). This study experimentally validates that packing density can be used as a post-printing technique to target specific modal resonances in a system. Central to this investigation is the development of a model that describes the behavior of a particle damper under sinusoidal excitation. It effectively captures the complex interactions between the particles and the damper’s housing as they respond to various vibrational stimuli. The model utilizes a continuous transfer function approach using an input-output relationship. The paper highlights the potential advantages of using LPBF-manufactured particle dampers over conventional damping systems. These include enhanced flexibility in material integration, the ability to manufacture complex geometries, acoustic emission mitigation, and lower maintenance needs.