中文摘要：

磁性颗粒沉淀影响了磁流变阻尼器的动力性能及稳定性。在颗粒沉淀机理与阻尼器力学模型分析基础上,以MTS810测试系统的加载激励信号,对剪切阀式磁流变阻尼器进行阻尼力、耗能、时间响应、激振-阻尼力响应性的动力性能试验,比较了在不同励磁电流下,颗粒沉淀、半沉淀、均匀三种不同状态的力学影响。试验结果表明,颗粒沉淀对磁流变阻尼器工作稳定性、阻尼力响应性及减振效果产生较大影响,并为阻尼器结构参数优化及工程实际应用提供有效参考价值。

英文摘要：

The deposition of magnetic particles in MR Fluids degrades the dynamic performance and stability of Magnetorheological（MR） dampers.Based on the deposition mechanism of particles and the mechanical model of shear-valve MR damper,dynamic performance tests are carried out to study the damping force,energy dissipation and dynamic responsiveness under the conditions of deposition,half deposition and uniform distribution of magnetic particles in MR Fluids respectively.The performance tests were performed on a material testing system 810（MTS 810） machine with a variety of excitations.The results show that deposition of magnetic particles significantly influence the stability,dynamic responsiveness and damping effect of MR dampers.The study will be helpful in optimizing structural parameters of MR dampers and engineering application of the dampers.