中文摘要：

采用多重网格法和多重网格积分法对水基磁流体润滑轴承进行弹流润滑分析,在雷诺方程中考虑了热、非牛顿、磁场和时变的影响,探讨了粗糙度因素对弹流润滑性能的影响.分析中对比了轴-轴承双面和轴承单面带有正弦粗糙度时的润滑膜膜厚和压力的分布,并研究了双面都带有粗糙度相位不同时润滑膜压力和膜厚的分布.数值分析结果表明,两个表面都存在相同的粗糙度时,在波峰相对处的膜厚更小,压力更大,在波谷相对处的膜厚更大,压力更小;随着一个表面的粗糙峰远离另一个表面的粗糙峰时,膜厚和压力渡动减小,润滑膜的最小膜厚逐渐增大,最大压力逐渐减小,直到润滑膜的粗糙峰与粗糙谷相对时,膜厚和压力不在波动,最小膜厚达到最大,最大压力达到最小.然后当这个表面粗糙峰再继续接近下一个表面粗糙峰时,膜厚和压力的波动增大,润滑膜的最小膜厚又开始减小,最大压力又增大,直到润滑膜的粗糙峰与粗糙峰相对时,膜厚和压力波动最大,最小膜厚达到最小,最大压力达到最大.

英文摘要：

The elastohydrodynamic lubrication analysis （EHL） of water-based ferrofluid lubricated bearing was studied by multi-grid method and multi-grid integration method. The influence of thermal effect, non-newtonian, magnetic field and transient were considered in Reynolds equation, and the EHL property under the condition of roughness was discussed. The pressure and the film thickness distributions with two same sine roughness surfaces and one sine roughness surface were compared, and the different phases influence on the pressure and film thickness were studied under the condition of two roughness surfaces. The numerical analysis results showed that the same roughness were considered on the two surfaces, the film thickness was much thinner and the pressure was much higher in the contact area of peak and peak, the film thickness was much thicker and the pressure was much lower in the contact area of peak and valley; While one surface roughness was away from the other, the wave of pressure and film thickness became weaker, the minimal film thickness increased and the maximum pressure decreased until they do not wave in the contact area of peak and peak, the minimal film thickness became the thickest and the pressure became the lowest. Then one surface roughness was close to the other, the wave of pressure and film thickness became stronger, the minimal film thickness decreased and the maximum pressure increased until the largest wave appeared in the contact area of peak and peak, the minimal film thickness became the thinnest and the pressure became the largest.