• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

›› 2006, Vol. 42 ›› Issue (4): 173-178.

• 论文 • 上一篇    下一篇

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冲击载荷作用下磁流变阻尼器的建模与分析

侯保林;MEHDI Ahmadian   

  1. 南京理工大学机械工程学院;弗吉尼亚理工学院与州立大学机械工程系
  • 发布日期:2006-04-15

MODELING AND ANALYSIS OF A MAGNETO-RHEOLOGICAL SHOCK DAMPER

HOU Baolin;MEHDI Ahmadian   

  1. School of Mechanical Engineering, Nanjing University of Science and Technology Department of Mechanical Engineering, Virginia Polytechnic Institute and State University
  • Published:2006-04-15

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摘要： 以某12.7 mm机枪的磁流变(MR)后坐阻尼器为研究对象，基于Herschel-Bulkley本构模型，建立了该MR后坐阻尼器的轴对称一维层流模型。运用ANSYS软件，对该阻尼器的MR阀进行了磁场有限元分析，求得了环状间隙间MR流体的磁通密度。将MR流体流动模型和MR阀有限元结果相结合，建立了不同磁场作用下阻尼力随活塞速度的变化规律，利用这些规律对该阻尼器的落锤撞击试验和实弹射击试验进行了数值仿真。理论与试验结果的对比指出，在低磁场作用的情况下，理论与试验结果具有较好的一致性。

关键词: 冲击, 磁流变阻尼器, 数值仿真

Abstract: A magneto-rheological (MR) shock damper for a 12.7 mm machine gun test application is discussed. Based on Herschel-Bulkley shear model, a one-dimensional axisymmetric laminar flow model of the MR damper is constructed. The finite element analysis of magnetic field of the MR valve of the damper is done via ANSYS package, and the magnetic flux density of the annular duct of the MR valve is obtained. Combining the MR fluid flow model and the FEM model of the MR valve, the relation curves of damping force and piston velocity of the MR damper is computed. Using the force-velocity characteristics of the MR damper, a drop-mass impact test and a 12.7 mm gun firing test for the MR recoil damper is numerically simulated. The theoretical and experimental results are compared, and it indicates that good consistency between test and simulation can be achieved when applied magnetic field is low.

Key words: Shock load, Magneto-rheological (MR) damper, Numerical simulation

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