【摘要】 基于Bingham力学模型,设计、制作小尺寸旋转剪切式MR阻尼器,通过数字式特斯拉计测量励磁线圈的磁感应强度。设计了阻尼器试验装置,并对此MR阻尼器进行2种激励位移、11种输入电流和4种激励频率共88种工况的力学性能试验,根据MR阻尼力-速度滞回曲线,克服Bingham模型在零速度附近不能说明阻尼力-速度的关系,引入惯性力项方法,提出了改进滞回曲线非线性力学模型。采用智能粒子群算法辨识修正的滞回力学模型参数,通过阻尼器试验数据与修正滞回力学参数值进行对比,证明此滞回模型能很好地描述MR阻尼器强非线性的动力特性。更多还原

【Abstract】 The parameters of the MR damper are designed based on the Bingham mechanical model.The magnetic induction of the coil is measured by the digital tesla meter and the rotary shear MR damper is manufactured,which maximum damping force is about to 1 N.The damping force performances of the MR damper is totally tested in 88 conditions,including of 2 kinds of excitation displacements,11 kinds of input current,and 4 kinds of excitation frequencies.Based on the force-velocity hysteretic curves of the MR damper,the problem that Bingham model fails to capture the hysteretic curve of MR damping force and velocity around zero velocity can be solved.The hysteretic model of RSMRD is calibrated with an improved hysteretic model with an additional inertial force,where each parameter is identified by intelligent particle swarm optimization.Compared the test data of the MR damper and the calculated data of the improved hysteretic model,the results show the hysteretic model can be feasible to describe strongly nonlinear dynamic behaviors of the MR damper.更多还原