Simplified design method for shear-valve magnetorheological dampers  

作　　者：Ding Yang Zhang Lu Zhu Haitao Li Zhongxian 

机构地区：[1]School of Civil Engineering, Tianjin University [2]Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education

出　　处：《Earthquake Engineering and Engineering Vibration》2014年第4期637-652,共16页地震工程与工程振动（英文刊）

基　　金：The National Basic Research Program of China(973 Program)under Grant No.2011CB013606;the Major Research Plan of the National Natural Science Foundation of China under Grant No.91315301-06;the National Natural Science Foundation of China under Grant No.51378343;the Natural Science Foundation of Tianjin,China under Grant No.13JCZDJC35200;the Specialized Research Fund for the Doctoral Program of Higher Education of China under Grant No.20110032110042

摘　　要：Based on the Bingham parallel-plate model, a simplified design method of shear-valve magnetorheological （MR） dampers is proposed considering the magnetic circuit optimization. Correspondingly, a new MR damper with a full-length effective damping path is proposed. The prototype dampers are also fabricated and studied numerically and experimentally. According to the test results, the Bingham parallel-plate model is further modified to obtain a damping force prediction model of the proposed MR dampers. This prediction model considers the magnetic saturation phenomenon. The study indicates that the proposed simplified design method is simple, effective and reliable. The maximum damping force of the proposed MR dampers with a full-length effective damping path is at least twice as large as those of conventional MR dampers. The dynamic range of damping force increases by at least 70%. The proposed damping force prediction model considers the magnetic saturation phenomenon and it can realize the actual characteristic of MR fluids. The model is able to predict the actual damping force of MR dampers precisely.Based on the Bingham parallel-plate model, a simplified design method of shear-valve magnetorheological （MR） dampers is proposed considering the magnetic circuit optimization. Correspondingly, a new MR damper with a full-length effective damping path is proposed. The prototype dampers are also fabricated and studied numerically and experimentally. According to the test results, the Bingham parallel-plate model is further modified to obtain a damping force prediction model of the proposed MR dampers. This prediction model considers the magnetic saturation phenomenon. The study indicates that the proposed simplified design method is simple, effective and reliable. The maximum damping force of the proposed MR dampers with a full-length effective damping path is at least twice as large as those of conventional MR dampers. The dynamic range of damping force increases by at least 70%. The proposed damping force prediction model considers the magnetic saturation phenomenon and it can realize the actual characteristic of MR fluids. The model is able to predict the actual damping force of MR dampers precisely.

关 键 词：MR dampers design method magnetic saturation prediction model TESTS 

分 类 号：TU352.11[建筑科学—结构工程]