NOPD的椭球状散体元建模

THREE DIMENSIONAL ELLIPSOIDAL ELEMENT DEM MODEL OF NOPD

提出了能模拟不同颗粒形状的微颗粒组合体的椭球状散体元模型，从理论上解决了椭球单元的接触判断及运动学、动力学问题。采用该模型对NOPD复合阻尼结构进行了动力学计算，计算结果与实验结果具有很好的一致性，为进一步研究NOPD的阻尼机理提供了一种理论分析方法。

A three-dimensional ellipsoidal DEM (Discrete Element Method) model is established for non-obstructive particle damping (NOPD). The model lays down a theoretical base for judgment of contact between ellipsoids and kinematic and dynamic analysis of the ellipsoids. The dynamic behavior of composite structures of NOPD is studied using this model. It is shown that the computational results are in very good agreement with those of experiments.