Equivalent parameter method for impact between two balls with fine particles
DU Yan-chen1; WANG Shu-lin2
1 School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2 School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
Abstract：Impact damping with fine particles as damping agent (IDFPDA) exhausts vibration energy by means of the plastic deformation of fine particles. In order to quantitatively study energy dissipation in the impact damping, equivalent parameters are used in the existing model of impact between two balls to rapidly predict the energy dissipation in particle clamping in a single period. FEM analysis on the impact between two balls covered by fine particles show good agreement with the results from the equivalent parameter method. Further results from the equivalent parameter method show that the energy dissipation in particle clamping is much more than that in collision without particles under the same initial conditions, which implies that the performance of the IDFPDA is better than the conventional impact damping and agrees well with the existing experimental results. By means of FEM, we discuss the effects of parameters, including diameter ratio of particle to ball, particle material and particle amount in collision area, on the energy dissipation of impact between two balls with fine particles, and further demostrate the rationality of the equivalent parameter method. The study provides a useful tool to predict the damping analysis for IDFPDA and simulate the vibro-impact damping system.
杜妍辰;王树林. 等代参数法预测颗粒夹击过程中的能量损耗[J]. , 2011, 30(12): 160-163.
DU Yan-chen;WANG Shu-lin. Equivalent parameter method for impact between two balls with fine particles. , 2011, 30(12): 160-163.
2011, Vol. 30 
