A novel design of a magnetorheological (MR) damper is developed, fabricated, modeled, and tested. The design includes some features that enhance the magnetic characteristics of the damper. The iron–cobalt–vanadium “Vacoflux-50” alloy and the “AMT-Smartec+” MR fluid, whose magnetic characteristics have been predicted to enhance the performance of the damper, are used in the new design. Moreover, the location of the MR fluid region in the piston construction has been chosen so that the magnetic field maximizes. To evaluate the impact of the proposed design improvements, an approach to modeling the performance of a previously tested MR damper of a different design, different magnetic material, and different MR fluid has been developed. The approach combines a finite element analysis (FEA) of the magnetic circuit and a nonlinear analytical model of fluid flow. The results of the FE/analytical approach have been validated using the available published results of the same damper. Hence, the approach has been used to predict the performance of the same damper due to the use of the proposed design improvements. The FE/analytical approach accounts for the nonlinear characteristics caused by the magnetic saturation of materials and the effects of fluid compressibility and aeration in the damper. It has been found that the implementation of the proposed design features leads to a remarkable increase in the magnetic field and the fluid yield stress. Also, the inclusion of the nonlinear magnetic and fluid flow characteristics have been found to affect the magnetic field distribution and the fluid yield stress greatly.

中文翻译：

---

具有增强磁特性的磁流变阻尼器的磁路分析和流体流动建模

开发、制造、建模和测试了磁流变 (MR) 阻尼器的新颖设计。该设计包括一些增强阻尼器磁特性的功能。新设计中使用了铁钴钒“Vacoflux-50”合金和“AMT-Smartec+”MR 流体，其磁性特性已被预测可提高阻尼器的性能。此外，已选择活塞结构中 MR 流体区域的位置，以使磁场最大化。为了评估提议的设计改进的影响，已经开发了一种对先前测试过的不同设计、不同磁性材料和不同 MR 流体的 MR 阻尼器的性能进行建模的方法。该方法结合了磁路的有限元分析 (FEA) 和流体流动的非线性分析模型。有限元/分析方法的结果已经使用相同阻尼器的可用公布结果进行了验证。因此，由于使用了所提出的设计改进，该方法已被用于预测相同阻尼器的性能。有限元/解析方法考虑了由材料磁饱和引起的非线性特性以及阻尼器中流体可压缩性和充气的影响。已经发现，所提出的设计特征的实施导致磁场和流体屈服应力的显着增加。还，