内置障碍网络颗粒阻尼器的耗能机理研究  

Energy dissipation mechanism of particle damper with built-in obstacle network

作　　者：胡寅 昝浩 郭有松 梅港伟 夏兆旺 彭子龙 HU Yin;ZAN Hao;GUO Yousong;MEI Gangwei;XIA Zhaowang;PENG Zilong(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China;Jiangsu Gongbang Vibration Control Technology Co.,Ltd.,Changzhou 213000,China)

机构地区：[1]江苏科技大学能源与动力学院,江苏镇江212003 [2]常州工邦振控科技有限公司,江苏常州213000

出　　处：《振动与冲击》2023年第15期199-209,共11页Journal of Vibration and Shock

基　　金：江苏省自然科学青年基金(BK20200995);基础加强计划技术领域基金(2020-JCJQ-JJ-228);基础加强计划重点项目(2020-JCJQ-ZD-222);热能动力技术重点实验室开放基金(TPL2020003)。

摘　　要：传统颗粒阻尼器在振动强度较高的情况下存在能量损耗效率低的缺陷,通过试验发现在颗粒阻尼器中内置三维网络结构(障碍网络)可以改善上述难题。为了探究内置障碍网络对颗粒运动状态及能量损耗的影响机理,采用离散元方法建立内置障碍网络的颗粒阻尼器数值模型并开展试验验证,研究振动参数和填充比对有无障碍网络颗粒阻尼器的耗能影响,探讨颗粒阻尼器内部颗粒碰撞及能量损耗空间分布特性。结果表明,在30~160 Hz, 2.5~25.0g振动条件及50%~90%填充比条件下,障碍网络能够改变颗粒群体运动行为以及增强其能量耗散性能;使原本对能量耗散几乎没有贡献的颗粒产生剧烈运动,参与到能量耗散过程;障碍网络使底部空间颗粒群体在一个振动周期内产生倍频的碰撞特性,极大增加能量损耗。Traditional particle damper has the disadvantage of low energy dissipation efficiency during vibration intensity being higher.Through experiments,it is found that a 3D network structure(obstacle network)built into a particle damper can improve the above problem.Here,to explore the influence mechanism of built-in obstacle network on particle motion state and energy dissipation,the discrete element method was used to establish a numerical model of particle damper with built-in obstacle network,and experiments were conducted for verification.Effects of vibration parameters and filling ratio on energy dissipation of particle damper with or without obstacle network were studied to explore spatial distribution characteristics of particle collisions and energy dissipation inside particle damper.The results showed that under vibration conditions of 30-160 Hz and 2.5-25.0 g as well as 50%-90%filling ratio,obstacle network can change motion behaviors of particle groups and enhance their energy dissipation performance;obstacle network can cause particles with little contribution to energy dissipation to undergo intense motion and participate in energy dissipation process;obstacle network causes particle group in bottom space to generate a frequency-doubling collision feature within a vibration period,so energy dissipation greatly increases.

关 键 词：颗粒阻尼 障碍网络 损耗因子 能量损耗 颗粒流态 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3