重力参数对非阻塞性颗粒阻尼减振特性的影响  

Influences of Different Gravity on Damping Performances of Non-obstructive Particle Dampers

作　　者：张超[1,2] 侯炳坤 黑晓涛 王雷[1,2] 陈天宁[3] ZHANG Chao;HOU Bingkun;HEI Xiaotao;WANG Lei;CHEN Tianning(Hubei Agricultural Machinery Engineering Research and Design Institute,Hubei University of Technology,Wuhan 430068,China;Hubei Province Agricultural Equipment Intelligent Engineering Technology Center,Hubei University of Technology,Wuhan 430068,China;School of Mechanical Engineering,Xi′an Jiaotong University,Xi′an 710049,China)

机构地区：[1]湖北工业大学农业机械工程研究设计院,武汉430068 [2]湖北工业大学湖北省农机装备智能化工程技术研究中心,武汉430068 [3]西安交通大学机械工程学院,西安710049

出　　处：《噪声与振动控制》2024年第1期64-69,167,共7页Noise and Vibration Control

基　　金：国家重点研发计划资助项目(2017YFD0700304-03);湖北省自然科学基金资助项目(2018CFB281)。

摘　　要：针对非阻塞性颗粒阻尼(Non-obstructive Particle Damping,NOPD)在微重力、超重及离心等非常态环境中减振效果较差的问题,采用重力加速度表征这些非常态物理环境,利用离散元法(Discrete Element Method,DEM)研究重力参数对NOPD减振特性的影响,同时还分析NOPD最优填充比及最优粒径比等结构参数在不同重力条件下的变化规律。研究表明,重力加速度在0.7~1.0 g之间时NOPD减振效果最好。在微重力环境下,当重力参数变化时,NOPD最优填充比为0.85,最优粒径比为0.45。而当重力加速度大于1 g时,NOPD最优填充比及最优粒径比均随重力加速度的增加而减小,且其最优范围也均有所扩大。To improve the damping performances of non-obstructive particle damper(NOPD)in abnormal environments such as the micro-gravity conditions,hyper-gravity environments and centrifugal environments,the discrete element method(DEM)is adopted to investigate the effects of different gravity on the damping performances of NOPD,and the structural parameters such as the optimal filling ratio and the optimal diameter rate of particles under different gravity conditions are also analyzed.The results show that the damping effects of NOPD are the best when the gravity acceleration is between 0.7 and 1.0 g.In addition,in the micro-gravity environments,the optimal filling ratio and the optimal diameter rate of particles remain constants no matter the change of gravity parameters,which are 0.85 and 0.45,respectively.When the gravity acceleration is greater than 1.0 g,the optimal filling ratio and the optimal diameter rate of particles and cavity of NOPD decrease with the increase of gravity acceleration,and their optimal ranges are expanded.

关 键 词：振动与波 非阻塞性颗粒阻尼 非常态物理环境 重力参数 填充比 粒径比 

分 类 号：TB535[理学—物理]