逆变型磁流变阻尼器的设计及性能试验  

DESIGN AND EXPERIMENTAL STUDIES ON THE INVERSE CONTROL MAGNETO-RHEOLOGICAL DAMPER

作　　者：杜修力[1] 牛东旭[1] 廖维张[1] 贾鹏[1] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100022

出　　处：《振动与冲击》2006年第5期49-53,共5页Journal of Vibration and Shock

基　　金：国家杰出青年基金资助项目(50325826);国家人防办"十五"计划项目;北京市教育委员会科学技术与研究生教育建设项目资助

摘　　要：首先介绍磁流变阻尼器（Magneto—rheological Damper）的设计原理，设计制作了一种新型的阻尼器一逆变型MR（Magneto-rheological）阻尼器，并在小振动台上对其进行了性能试验，重点研究此阻尼器在高频（10～50Hz）下的工作性能，并采用修正的Bouc-Wen模型，结合试验结果，确定了其中的模型参数。所得到的结论：（1）将永久磁场和电流磁场结合起来从而实现阻尼器的逆向控制的设计思路时可行的，铜制隔磁环的设置保证了磁力线沿理论设计的路径穿行，又使线圈避免与磁流变液的长期接触腐蚀从而提高其耐久性；（2）所采用的修正的Bouc—Wen模型能较好地模拟阻尼器的高频性能，为此种阻尼器在高频波下的应用提供了理论依据；（3）试验结果表明：阻尼力一位移滞回曲线比较饱满，阻尼力一速度曲线基本符合理论假定。在15～50Hz频段内，修正的Bouc—Wen模型中的各参数取值较为稳定。A new-type damper-Inverse Control MRF Damper was designed and made based on the design principle of the magneto-rheological damper. The performance test of the MRF damper has been carried out on a small shaking table with focus on studying the working performance of the damper under high frequencies (10-50Hz). In addition, the modified Bouc-Wen model was adopted to fit the tests data. The results are as follows:(1) It is feasible for the inverse control of the damper to be implemented by combining the permanent magnetic and the electro-magnetic field. The application of the isolating magnetic hoop can assure the magnetic lines to run along the theoretical designed path, and also raise the durability of the damper by avoiding the direct contact between the coils and MR fluid. (2) The modified Bouc-Wen model can well simulate high-frequency performances of damper. It provides a theoretical foundation for application of the kind of damper under high-frequency waves. (3) It is shown from the test that the force-displacement delay curve is satiated, and the force-velocity curve coincides well with the theoretical one. The parameters of the modified Bouc-Wen model coule be taken as nearly stable values in the 15-50Hz range.

关 键 词：逆变型磁流变阻尼器 高频波 振动特性 性能试验 

分 类 号：TU315[建筑科学—结构工程]