摘要
为探究活塞杆颗粒阻尼器阻尼性能,该研究基于离散元-多体动力学耦合分析方法(discrete element method-multibody dynamics,DEM-MBD),建立了活塞杆颗粒阻尼器仿真模型。通过数值模拟,研究活塞杆颗粒阻尼器颗粒材料特性、颗粒尺寸、活塞杆埋入深度及振动幅值和频率对阻尼性能的影响规律。研究结果表明,颗粒间摩擦效应、活塞杆埋入深度对阻尼性能影响显著,碰撞恢复系数对阻尼性能无影响,并发现振动位移与颗粒粒径相等时阻尼效果达到局部最优值。基于以上结论,该研究进一步研究了一种弹簧预紧力作用下显著提升阻尼性能的活塞杆颗粒阻尼器模型,并通过试验对仿真结果进行了验证,为活塞杆颗粒阻尼器在实际振动控制应用中提供理论参考。
In order to investigate the damping performance of piston particle damping performance,a simulation model of a piston particle damper was established based on the discrete element method-multibody dynamics(DEM-MBD)coupling method.Through numerical simulation,particles material characteristics,particles size,piston embedding depth,vibration amplitude,and frequency on the damping performance of the piston particle damper were investigated.Results show that the coefficient of friction between particles and piston embedding depth have significant effects on the damping performance,and the coefficient of restitution has no effect on the damping performance.It is found that the damping performance has a local optimal solution when the vibration displacement and particle size are equal.Based on the above conclusions,a piston particle damper model that significantly improved damping performance under spring preload was investigated in this paper.Simulation results were verified through experiments,which provide theoretical reference for piston particle dampers in practical vibration control applications.
作者
王朝
高静
尹忠俊
WANG Chao;GAO Jing;YIN Zhongjun(School of Mechanical Engineering,University of Science and Technology Beijing,Beijing 100083,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第20期168-175,共8页
Journal of Vibration and Shock
关键词
颗粒阻尼器
比阻尼
弹簧预紧力控制
振动控制
particle damper
specific damping capacity
spring preload control
vibration control
