As an essential and critical step, magnetic circuit model is usually implemented in the design of efficient and compact magnetorheological (MR) devices, such as MR dampers and MR elastomer isolators. Conventional magnetic circuit analysis simplifies the analysis by ignoring the magnetic flux leakage and magnetic fringing effect. These assumptions are sufficiently accurate in dealing with less complicated designs, featuring short magnetic path lengths such as in an MR damper. However, when dealing with MR elastomer devices, such simplification in magnetic circuit analysis results in inaccuracy of dimensioning and performance estimation of the devices due to their sophisticated design and complex magnetic paths. Modelling permanent magnets also imposes challenges in the magnetic circuit analysis. This work proposes an improved approach to include magnetic flux fringing effect in magnetic circuit analysis for MR elastomer device. An MRE-based isolator containing multiple MRE layers and both a permanent magnet and an exciting coil is used in this paper as a case study. The results are compared to those of conventional magnetic circuit modeling and finite element analysis to demonstrate the effectiveness of the proposed approach.

中文翻译：

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具有永磁体和电磁体的叠层磁流变弹性体装置的改进磁路分析

作为必不可少的关键步骤，磁路模型通常用于设计高效紧凑的磁流变 (MR) 设备，例如 MR 阻尼器和 MR 弹性体隔离器。传统的磁路分析通过忽略漏磁和磁边效应来简化分析。这些假设在处理不太复杂的设计时足够准确，具有较短的磁路长度，例如在 MR 阻尼器中。然而，在处理 MR 弹性体设备时，由于其复杂的设计和复杂的磁路，磁路分析中的这种简化会导致设备的尺寸和性能估计不准确。永磁体建模也给磁路分析带来了挑战。这项工作提出了一种改进的方法，将磁通边缘效应包括在 MR 弹性体装置的磁路分析中。本文使用一个基于 MRE 的隔离器作为案例研究，该隔离器包含多个 MRE 层以及一个永磁体和一个励磁线圈。将结果与传统磁路建模和有限元分析的结果进行比较，以证明所提出方法的有效性。