Study on Vibration Damping and Energy Dissipation Mechanism of Fan Pipelines Based on Particle Dampers with Built-in Grid

A vibration control method based on built-in grid particle dampers was studied to address the vibration issue in draught fan pipelines. A coupled simulation using discrete element method and multibody dynamics software was employed to establish a particle energy dissipation model. The impact of the built-in grid on particle motion and energy dissipation was visualized and analyzed. Additionally, a pipeline vibration experimental platform was constructed to investigate the effect of damper quantity and grid size on pipeline vibration control under different excitation conditions. The results indicate that the built-in grid damper exhibits a superior vibration reduction effect on various vibration peaks, significantly outperforming particle dampers without grid. The optimal vibration reduction effect is achieved with two dampers, and when the grid count is 8, the damper can achieve a maximum vibration control effect of 78% on the pipeline, surpassing the other two grid sizes. The built-in grid effectively enhances the damping performance of the damper under high excitation, providing a new approach for the improvement of particle dampers.