Nowadays, the automotive industry is oriented toward the production of new generation devices, such as magnetorheological fluid (MR fluid) dampers, which have a proven simplicity of design combined with reduced maintenance. Being devices powered by steady-state electric current, MR fluid dampers develop steady-state magnetic induction fields with associated steady-state thermal stresses and a consequent constant yield stress. In this work, an asymmetric MR damper has been studied using the finite-element method (FEM). Specifically, since steady-state electric current circulates in the coil of the device, a magneto-static analysis of the device and particularly of the strip of MR fluid contained therein is performed using the FEM. Furthermore, as the device is subject to heating during operation, a thermo-static analysis was also carried out using finite elements when different external temperatures were considered. Both analyses, performed by ANSYS ToolbBox, highlighted the areas of the device most subject to magnetic stress providing useful indications on the influence of temperature both on the magnetization of the magnetic particles and on the MR fluid as a whole.

中文翻译：

---

磁流变流体阻尼器的磁热静力学研究：有限元分析

如今，汽车行业正致力于生产新一代设备，例如磁流变流体 (MR 流体) 阻尼器，这些设备具有经过验证的设计简单性和更少的维护。作为由稳态电流供电的设备，MR 流体阻尼器会产生稳态磁感应场，并产生相关的稳态热应力和随之而来的恒定屈服应力。在这项工作中，使用有限元方法 (FEM) 研究了非对称 MR 阻尼器。具体地，由于稳态电流在装置的线圈中循环，所以使用FEM执行装置的静磁分析，特别是其中包含的MR流体条的静磁分析。此外，由于设备在运行过程中会受到加热，当考虑不同的外部温度时，还使用有限元进行了恒温分析。这两项分析均由 ANSYS ToolbBox 执行，突出显示了最易受磁应力影响的设备区域，提供了有关温度对磁性粒子磁化和整个 MR 流体影响的有用指示。