中文摘要：

为了准确分析颗粒阻尼（NOPD）的能量耗散机理,拓宽颗粒阻尼在工程中的应用范围,根据分子动理论基本原理,建立非阻塞性颗粒阻尼能量耗散的定量模型。在振动流化床颗粒系统研究成果的基础上,认为当阻尼器内部的颗粒充分流化时,颗粒之间的物质输运和能量耗散由颗粒之间的碰撞主导;将阻尼器内部颗粒的运动与气体分子的运动进行类比,建立非阻塞性颗粒阻尼的能量守恒方程;通过求解颗粒系统的广义温度,得到非阻塞性颗粒阻尼能量耗散功率的定量模型。研究结果表明,颗粒阻尼的能量耗散功率随着颗粒直径的增大、颗粒层数的增多、材料密度的增加以及振动强度的提高逐渐提高。与现有模型相比,提出的模型颗粒阻尼的能量耗散功率不依赖颗粒内部速度梯度,因而具有更大的实际应用范围,也为更精确地描述非阻塞性颗粒阻尼的能量耗散机理提供了一种新的思路。

英文摘要：

To investigate energy dissipation mechanism of non-obstructive particle damping（NOPD）accurately,the kinetic theory is employed to establish a quantitative analysis model.When the particles of NOPD are uniformly fluidized,the mass transport and energy exchange are dominated by the collisions among the particles.Solving the energy conservation equation of the NOPD,the temperature and the energy dissipation power of NOPD are obtained.The theoretical results show that NOPD energy dissipation power rises with the increasing particle diameter,layer number,material density and vibration amplitude.Compared with the previous analysis models of NOPD,the proposed model does not depend on the velocity gradient of particles,which widens the practical applications,and provides a new way to revealing energy dissipation mechanism of NOPD.