FENG Yuli1，ZHAO Xianqiong1，LONG Hui1,2，HUANG Dayong1，LIU Chi1
(1.College of Mechanical and Electrical Engineering，Central South University，Changsha 410083，China;2. School of Physics and Mechanical & Electrical Engineering, Shaoguan University, Shaoguan 512005, China)
Abstract: To improve the energy dissipation of particle damper，dynamic experiment about binary particles was designed. We adopted the steady state power flow method to calculate the power loss of particle system and analyzed the flow patterns and energy consumption of binary particle system under the state of layering and mixing. The results show that the other kind of particles increase the internal non-uniformity of particle system which intensify the internal collision and friction of particle system. It can be seen that binary particles have higher energy consumption level than homogeneous particles no matter in hierarchical or mixed case. When binary particles are layered, different diameter ratio will get different energy levels and it will reach the optimal energy consumption at the diameter ratio of 1.67. Those particles with smaller mass bottom or greater quantity of small particles contained can obtain further energy dissipation. When binary particles are mixed, the mixed degree does not affect the energy loss. The binary mixed particles have more significant promotion effect of energy consumption under the condition of large amplitude and high frequency excitation. And the optimal quality of the smaller balls increases with the rise of amplitude.
Keywords: binary particles； particle damping； vertical harmonic excitation； dissipation of energy
中图分类号：TB34 文献标志码：A
文章编号：1008-5548(2019)04-0012-06
DOI:10.13732/j.issn.1008-5548.2019.04.002
收稿日期： 2019-01-16，修回日期：2019-02-25，在线出版时间：2019-04-23 10:22。
基金项目：国家自然科学基金项目，编号：51374241。
第一作者简介：冯玉立(1993—)，男，硕士研究生，研究方向为颗粒阻尼减振特性的研究与应用。E-mail：fengyuli@csu.edu.cn。
通信作者简介：赵先琼(1965—)，女，教授，博士，博士生导师，研究方向为机械振动与疲劳强度分析。E-mail：csuzxq@csu.edu.cn。
