冲击载荷下磁流变阻尼器内部磁场动态数值计算与瞬态试验测试  

Dynamic numerical simulation analysis and transient experimental test of internal magnetic field for magneto-rheological damper during the impact

作　　者：杨辉静[1] 陈巍[1] 陈冬[1] Yang Huijing;Chen Wei;Chen Dong(Hebei Chemical&Pharmaceutical Vocational Technology College,050026,Shijiazhuang,China)

机构地区：[1]河北化工医药职业技术学院,石家庄050026

出　　处：《应用力学学报》2020年第4期1756-1762,I0026,共8页Chinese Journal of Applied Mechanics

基　　金：河北省教育厅青年基金项目(QN2018206)。

摘　　要：重点探究冲击载荷作用下,磁流变阻尼器磁回路动态时变特性。本文设计了双出杆三级独立式磁流变阻尼器,并自行研制了硅树脂基磁流变胶(MRG),对其进行稳态剪切测试,得到了Herschel-Bulkley模型中稠度系数k和非牛顿指数n随磁感应强度变化的规律;进而在冲击载荷作用下,对阻尼器内部磁场展开理论分析和数值仿真计算。分析结果表明:MRG-70在不同磁感应强度下的流动曲线符合Herschel-Bulkley剪切稀化模型;阻尼器内部存在散磁通,磁力线并非垂直穿过有效工作间隙,小部分磁力线在非工作区域形成了弱闭合磁回路,并且组合线圈产生的耦合磁场具有高度非线性和时变性。This paper focused on the research the dynamic time-varying characteristics of magneto-rheological damper magnetic loop under impact load, independent three stage magneto-rheological damper of double rod is designed. The silicone-based magneto-rheological gel(MRG) is prepared and the steady shear test is carried out to obtain the consistency coefficient k and the non-Newtonian index of the Herschel-Bulkley model. Theoretical analysis and numerical simulation of the internal magnetic field of the damper under impact load are carried out. Results show the flow curves of MRG-70 under different magnetic induction intensities conform to the Herschel-Bulkley shear thinning model. There is a scattered magnetic flux inside the damper. The magnetic field line is not perpendicular to the effective working gap, and a small part of the magnetic field line in the non-working area to form a weak closed magnetic circuit. The coupling magnetic field generated by the combined coil with a high degree of non-linear and time variability.

关 键 词：冲击载荷 磁流变胶 磁流变阻尼器 非线性 时变性 

分 类 号：TB381[一般工业技术—材料科学与工程]