为探究活塞杆颗粒阻尼器阻尼性能，本文基于离散元-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，本文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，并通过实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。
关键词：颗粒阻尼器；比阻尼；弹簧预紧力控制；振动控制
Abstract
In order to investigate the damping performance of piston particle damping performance, this paper established a simulation model of piston particle damper based on the discrete element method-multibody dynamics 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. The 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 significantly improved damping performance under spring preload was investigated in this paper. The simulation results are verified through experiments, which provides theoretical reference for the piston particle damper in practical vibration control applications.
Keywords: particle damper; specific damping capacity; spring preload control; vibration control
关键词
颗粒阻尼器 /
比阻尼 /
弹簧预紧力控制 /
振动控制
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Key words
particle damper /
specific damping capacity /
spring preload control /
vibration control
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