用于提高剪力墙性能的大尺度磁流变阻尼器的力学性能研究  

Research on mechanical properties of large-scale magnetorheological damper for improving the performance of shear wall

作　　者：阮晓辉 边会婷[1] 赵军[1] 龚兴龙[2] 朱全力 RUAN Xiaohui;BIAN Huiting;ZHAO Jun;GONG Xinglong;ZHU Quanli(School of Mechanics and Safety Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China;Department of Modern,Mechanics University of Science and Technology of China,Hefei 230027,Anhui,China)

机构地区：[1]郑州大学力学与安全工程学院,河南郑州450001 [2]中国科学技术大学近代力学系,安徽合肥230027

出　　处：《实验力学》2020年第5期759-770,共12页Journal of Experimental Mechanics

基　　金：国家重点研发计划政府间科技合作重点专项(2016YFE0125600);中国博士后基金(2019M652579);河南省高等学校重点科研项目计划(20B130003)资助

摘　　要：本文设计了一种用于提高剪力墙性能的大尺度磁流变阻尼器(Magnetorheological damper,MR damper),首先对大尺度磁流变阻尼器的力学性能进行理论分析,然后加工磁流变阻尼器,对其力学性能进行实验测试;根据理论分析和实验测试结果,研究磁流变阻尼器对剪力墙性能的影响规律。研究结果表明,该阻尼器可以提高剪力墙的耗能能力,同时还可以提高剪力墙的刚度和承载能力。根据磁流变阻尼器的工作原理和剪力墙的工作方式,本文研究中所涉及的磁流变阻尼器采用旋转剪切模式,最大设计扭矩为200N·m。首先通过理论分析和数值计算,确定阻尼器各部分的尺寸和材料选择。其次通过数值仿真的方法,分析阻尼器内部的磁场分布,并根据仿真结果对阻尼结构进行进一步地优化。依据理论分析、数值计算和仿真的结果,加工、组装磁流变阻尼器。利用万能试验机测试阻尼器在不同工况下的力学性能,并对测试结果进行研究分析。测试结果表明,本文所设计的磁流变阻尼器输出最大扭矩达到210N·m,且在不同工况下工作性能稳定,满足预期研究目标。最后,本文建立了剪力墙的力学模型,通过等效的方式,将磁流变阻尼器等效为一个阻尼力耦合到剪力墙上,通过数值仿真的方法,研究了磁流变阻尼器性能对剪力墙整体性能的影响,仿真结果显示本文设计的磁流变阻尼器可以增强剪力墙的刚度和承载力,且使剪力墙的耗能能力提高4.87%。A large-scale magnetorheological(MR)damper is designed for improving the performance of share wall.The theoretical and experimental methods are used to study the mechanical properties of the damper.The results indicate that the MR damper can effectively enhance the energy-dissipating capacity,the rigidity and the bearing capacity of the shear wall.The MR damper works in the shear mode of the MR fluid.The designed torque of the MR damper is about 200N·m.The sizes and materials of each part of the damper are designed according to the theoretical analysis and numerically calculated results.The distribution of the magnetic field inside the damper is optimized by the finite element method.Then,the MR damper is fabricated.The mechanical properties of the MR damper are tested by the universal tension and torsion testing machine under different conditions,such as different current,different angle amplitude and so on.The tested results indicate that the maximal torque provided by the MR damper is up to 210N·m and the mechanical properties of the damper are stable.At last,the mechanical model of the shear wall is established by the simulation method and the MR damper is coupled in the shear wall by the equivalent method.The influence of the MR damper on the mechanical properties of shear wall is studied by the finite element method.The simulated results indicate that the MR damper could enhance the mechanical properties of shear wall.The energy-dissipating capacity of shear wall increases by 4.87%using the MR damper.

关 键 词：磁流变液 磁流变阻尼器 扭矩 剪力墙 耗能能力 

分 类 号：O34[理学—固体力学] O37[理学—力学]