磁流变阻尼器滞回性能试验与计算模型分析-《郑州大学学报(工学版)》

文章信息/Info

Title:: Experimental and Calculation Model Analysis on Hysteresis Properties of Magnetorheological Damper

Author(s):: ZHAO Jun; GAO Ning; LI Xiaopeng; LEI Bobo; ZHAO Yi; School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China

Keywords:: magnetorheological damper; cyclic loading; damping force; damping force-displacement curve; curve model

摘要:: 为研究磁流变阻尼器( MRD) 的力学性能,共完成了 11 组轴向往复荷载作用下 MRD 力学性能试验,分别考虑了电流大小、峰值点位移、加载速率和电流控制方式等因素的影响,分析了 MRD 阻尼力-位移曲线变化规律和各阶段特征。结果表明:轴向往复荷载作用下,MRD 峰值点阻尼力基本随电流大小呈线性增长;峰值点位移小于初始位移时,MRD 峰值点阻尼力较小,峰值点位移大于初始位移时,MRD 峰值点阻尼力较为稳定;MRD 峰值点阻尼力随加载速率的增大而增大;加载过程中关闭电流,MRD 阻尼力将迅速降低至 0 A 时阻尼力,若继续通电,则 MRD 阻尼力仍能在较短加载位移后达到稳定状态。最后,建立了考虑电流大小、峰值点位移、加载速率及电流控制方式等影响因素的 MRD 阻尼力-位移曲线计算模型,经验证,计算曲线与试验曲线能较好地吻合。关键词:磁流变阻尼器; 往复荷载; 阻尼力; 阻尼力-位移曲线; 曲线模型

Abstract:: To study the mechanical properties of magnetorheological damper (MRD) , 11 groups of MRD mechanical properties tests with axially cyclic loading were completed. The effects of current size, peak displacement, loading rate and current control mode were considered. The variation law of damping force-displacement curve and characteristics of each stage of MRD were analyzed. The results showed that the damping force at the peak point of MRD increased linearly with the current. When the peak displacement was less than the initial displacement, the MRD peak damping force was small, and when the peak displacement was greater than the initial displacement, the MRD peak damping force was relatively stable; the damping force at the peak point of MRD increased with the increase of loading rate; when the current was closed, the damping force of MRD would be rapidly reduced to 0 A. If the power was continued, the damping force of MRD could still reach a stable state after a short loading displacement. Finally, the calculation model of MRD damping force-displacement curve considering the influence factors such as current size, peak displacement, loading rate and current control mode was established. It was verified that the calculation curve was in good agreement with the experimental curve.