Multi-Physics Analysis of a Magnetorheological Brake with Double Coils Placed on Side Housing
Multi-Physics Analysis of a Magnetorheological Brake with Double Coils Placed on Side Housing
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DOI：
10.4028/www.scientific.net/kem.739.252
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发表时间：
2017-06
期刊：
影响因子：
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通讯作者：
Wen-jun Meng;Siqing Wu;Baoluo Liu;Yao Wang
中科院分区：
文献类型：
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作者：
Wen-jun Meng;Siqing Wu;Baoluo Liu;Yao Wang
采用多学科耦合场分析方法，对侧壳上安装双线圈的汽车磁流变制动器的温度分布进行了研究。首先，采用一个新的表观粘度定义来连接磁场、流体动力学和温度场之间的联系。然后，建立了制动器的动力学模型，对制动盘的转动规律和制动总时间进行了评估。最后，基于Maxwell方程、Naiver-Stokes方程和共轭热传导方程，采用序贯耦合方法建立了多物理模型。结果表明，在稳态时，磁流变液制动器在零磁场下的整体温度分布比较均匀，最大温差约为9.7℃。制动过程中，径向和轴向的温度变化规律基本一致，最大温度出现在轴向工作间隙，最大值为113℃，低于所选磁流变液的最高允许工作温度。研究结果可为磁流变液制动器的设计提供参考。
This paper presents a multidiscipline coupled-field analysis method to study the temperature distribution of an automotive magnetorheological brake with double coils placed on side housing. First, a new apparent viscosity definition was employed to connect the communication of magnetic field, fluid dynamics, and temperature field. Then, the dynamic model of the brake was established to evaluated the rotation law of the brake disk and the total brake time. At last, multi-physics modeling was established with sequencetial coupling methods, which were based on the Maxwell equations, Naiver-Stokes equations and conjugate heat transfer equations. The results indicate that the overall temperature distribution of the MR brake is relatively uniform at a zero magnetic field during the steady state, and the maximum temperature difference is about 9.7°C. During braking process, the temperature variation regularity for radial and axial points is basically the similar, and the maximum temperature appears in the axial working gap, the maximum value is 113°C which is less than the maximum allowable working temperature of the chosen MR fluid. The results can be taken as reference to the design of the MR brake.