中文摘要：

为了考察MR阻尼器工作时的温度特征,对其瞬态温度场进行了多场耦合仿真与试验。基于MR阻尼器工作过程的能量转化,计算热学参数,建立非稳态多场耦合仿真模型。用FLUENT软件求解MR阻尼器瞬态温度场,用温度传感器监测MR阻尼器外壁温升,对比分析仿真与试验结果,并讨论综合散热系数的影响。研究表明,MR阻尼器瞬态温度场呈现以活塞为中心向两端盖递减的梯度分布,5000s后逐渐趋于稳定;仿真与实测数据高度拟合,偏差小于6%;综合散热系数主要影响1000s后的温度变化,从7.06提高到30.11时,阻尼器最终温度下降24.35%。研究结果可为MR阻尼器结构参数优化与散热系统设计提供参考。

英文摘要：

In order to investigate the temperature field characteristics of MR （Magneto-rheological） damper in working process, the transient temperature field is analyzed by multi-field coupling simulation and test. Based on the energy transformation of the MR damper working process, the thermal parameters are calculated, and the transient multi-field coupling simulation model is established. Using FLUENT as the solver, the transient temperature field of MR damper are simulated. Temperature sensors are used to measure the temperature of the external wall of the MR damper. The simulation results and the test results are compared, and the effect of the integrated heat transfer coefficient is discussed. The results show that the distn＇bution on transient temperature field of MR damper is gradient with the piston as the high temperature center, and diminishing to both cover ends. The temperature will gradually stabilized at about 5 000 s. The simulation results coincide with the test very well, the deviation is 6%. The integrated heat transfer coefficient mainly affects the temperature change after 1 000 s, while it is increased from 7.06 to 30.11. The final temperature is restrained of 24.35%. The research results can provide reference for the structural optimization and heat dissipation design of MR dampers.