Acoustic radiation response prediction of thin-walled box with particle dampers using multiphase flow theory of gas-particle

In this paper, acoustic radiation response of thin-walled box with particle dampers is predicted. First, the effect of the collisions and friction between the granular inter-particles is interpreted as an equivalent nonlinear viscous damping based on multiphase flow theory of gas-particle. Then the contribution of particle damper is estimated as an equivalent mass-damper system. And the acoustic radiation response of thin-walled box with particle dampers is predicted in the finite element method. Finally, an originality and novelty simulation method is developed to evaluate acoustic radiation response characteristics of particle damping composite structure by COMSOL. With this as a base, detailed numerical studies using the originality simulation method are also carried out to analyze the acoustic radiation response characteristics of the particle-damping thin-walled box. An experimental verification is conducted, and a good agreement between the theoretical results and the experimental data shows that the theoretical work in this paper is valid