管路减振用磁流变阻尼器设计与性能研究

Design and Performance Study of Magnetorheological Fluid Damper for Pipeline Vibration Control

针对流体动力管路减振降噪需求,提出了一种应用于流体动力管路振动控制的双出杆剪切阀式磁流变阻尼器设计方法.以磁流变阻尼器Bingham模型为基础,将磁流变阻尼器结构设计与磁路设计相结合,推导了阻尼器结构参数的计算公式.采用COMSOL对磁流变阻尼器电磁场进行了仿真,并计算了磁流变阻尼器在不同控制电流下的剪切应力.根据所提出的磁流变阻尼器设计方法及管路振动控制需求,研制了磁流变阻尼器样机,并对样机进行了动态力学性能测试.测试结果表明:磁流变阻尼器性能参数与理论设计要求基本一致,证明了该设计方法的正确性和可行性,并且采用该优化设计方法能够简化磁流变阻尼器设计过程和减小磁流变阻尼器体积.

To meet the requirements of vibration and noise reduction in hydraulic pipeline,a design method of double-outlet shear-valve magnetorheological(MR)damper was proposed.Based on the Bingham model of MR damper,combining the structural design of the MR damper with the design of the magnetic circuit,the calculation formula of the structural parameters of the damper was deduced.A finite element analysis software COMSOL was selected to simulate the electromagnetic field.An accurate and simple computational method based on the simulation model was established to calculate the viscous stress and shear stress under different control current.According to the proposed design method,a prototype of MR damper was developed,and the dynamic mechanical properties of prototype were tested.The test results show that the performance parameters of the MR damper are basically identical with the theoretical design values,which proves the correctness and feasibility of this design method,and the design method can simplify the design process and reduce the volume of MR damper.