The Energy Consumption And Simulation Research Of Particle Damper

Non obstructive particle damping (Non-obstructive Particle Damping, the NOPD) is a new type of passive vibration control technology which is in the field of vibration control in the 1990s. The technology gain the best damping effect by appropriate part issued a small cavity or attaching additional cavity in the right position which fills a certain number of particles in the engineering systems or the mechanical system. Because of small changes to the original structure, without adding additional mass, low cost, wide range of application environments, good damping, vibration isolation and shock and by selecting a reasonable punch location to reduce the stress concentration, it is widely used in various fields.The thesis fist introduced the basic principle of the discrete element method and algorithm, built the NOPD DEM model and based on the PFC3D software to bulid a simulation of particle damper model. Then the impact of particle damper energy dissipation was analyzed by different particle size, different grain filling rate, different particle materials and mixed particle of different materials under different rotational speeds in the vertical plane, the horizontal pane and the horizontal plane of constant speed rotation vibration reciprocating cycle according to the established simulation models.The particle damper energy consumption is introduced, and it is used to quantitatively analyze damping effect of each case. Secondly the influence of the diffenent particle damper shape and size is ansys in the different filling rate. Finally, the study when the particle damper is in the vertical plane and the horizontal plane transverse acceleration is rotated, the damper is still valid and the operating characteristics of the work.In summary, the article fully consider all parameters on the energy impact dampers, and through theoretical analysis and simulation results of a combination of methods in-depth study of the particle damper energy dissipation characteristics in order to promote particle damper technology in practical engineering the application provides a theoretical basis and guiding principles.