新型双活塞磁流变阻尼器的理论分析与实验研究  

Analysis and tests for a novel double-piston MR damper

作　　者：王强[1] 陈照波[1] Ahmadian Mehdi 刘文涛[1] 

机构地区：[1]哈尔滨工业大学机电工程学院,哈尔滨150001 [2]弗吉尼亚理工大学机械工程系

出　　处：《振动与冲击》2015年第21期144-149,169,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(10972065;11372083)

摘　　要：针对空间柔性桁架结构振动半主动控制的需要,提出了一种重量轻、结构紧凑的双活塞磁流变阻尼器。基于磁流变液流变特性和流体动力学理论,通过分析阻尼器节流通道内的流场情况,建立了阻尼力与活塞速度之间的关系。给出了适用于阻尼器初始设计的简化阻尼力计算方法,准静态测试的结果验证了计算方法的正确性。针对动态测试实验结果中输出力在去程和回程的不对称问题,提出了一种改进的非对称双曲正切模型。结果表明,改进模型能够准确描述新型阻尼器的动力学特性,在去程和回程都有很高的建模精度。Here,a novel double-piston magnetorheological （MR）damper was proposed,its lightweight and compact size features made it especially suit for lightweight space flexible truss structures＇vibration semi-active control. The fluid dynamic analysis of the damper was conducted using Bingham plastic model and the fluid dynamics theory. Based on a proper hypothesis,a simplified damping force calculation method fit for preliminary design phase was proposed.Tests were designed and performed to obtain the damper＇s hysteretic behavior under different drive currents. Aiming at the damper tests＇output force asymmetry problem at go stroke and return-one,an improved asymmetric hyperbolic tangent model was presented.Comparative study results showed that the improved model can describe precisely the dynamic hysteretic behavior of this double-piston MR damper under different drive currents;it has a higher modeling accuracy at go-stroke and return-one simultaneously.

关 键 词：磁流变阻尼器 磁流变液 Bingham模型 非对称双曲正切模型 

分 类 号：TB383[一般工业技术—材料科学与工程] O373[理学—流体力学]