Prediction of vibration response and acoustic radiation of a thin-walled box with particle dampers using multiphase flow theory of gas-particle

In this paper, vibration response and acoustic radiation of a thin-walled box with particle dampers are predicted. First, the effects of the collisions and friction between the granular inter-particles are interpreted as an equivalent nonlinear viscous damping based onmultiphase flow theory of gas-particle. Then the contribution of particle damper is estimated as an equivalent mass-damper system. Next, the model for the thin-walled box with particle dampers is implemented in the finite element method using COMSOLMultiphysics Software. Finally, the vibration response and acoustic radiation of a thin-walled box with particle dampers based onmultiphaseflowtheory are predicted using such original and novel simulationmethod. An experimental verification is conducted and a good agreement is obtained between the theoretical results and the experimental data.