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国外文献 > 1.轴承 > 2. 轴承类型与部件 > 滑动轴承

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标 题： 3D Surface Roughness Effects on Transient Non-Newtonian Response of Dynamically Loaded Journal Bearings
三维表面粗糙度对动态载荷下滑动轴承瞬态非牛顿响应的影响
作 者： K. M. JAGADEESHA
T. NAGARAJU
SATISH C. SHARMA
S. C. JAIN
关键词： Journal Bearings  [轴向轴承]
Hydrodynamic Bearings  [ 流体动力轴承]
Roughness Effects in Hydrodynamics  [ 流体力学中的粗糙效应]
Non-Newtonian Effects in Hydrodynamics  [ 流体力学中的非牛顿效应]
Viscoelasticity  [ 粘弹性]
出版年： 2012
期刊名： Tribology Transactions
摩擦学 Transactions
年卷期： 2012, vol.55, no.1
摘 要： The influence of 3D surface roughness on the transient non-Newtonian response of a dynamically loaded journal bearing under mixed lubrication is studied. A study of the transient non-Newtonian response of a dynamically loaded journal bearing under mixed lubrication condition is performed including the effects of 3D surface roughness parameters such as roughness orientation and characteristics of surface roughness of opposing surfaces and the variation of fluid viscosity across and along the fluid-film thickness due to shear thinning and viscoelastic behavior of the lubricant. The Reynolds equation is modified to include the effects of surface roughness, viscosity variation across the fluid-film, and viscoelastic properties of the lubricant. The power law model and Maxwell's model are employed to characterize shear thinning and viscoelastic properties of the lubricant, respectively. The solution of the modified average Reynolds equation is obtained using a finite element method and appropriate iterative schemes. Results are presented for a journal bearing subjected to sinusoidal loading. The bearing transient response was found to be significantly affected by the characteristics of surface roughness of opposing surfaces. The bearing with stationary roughness was observed to have good load-carrying capacity.

研究了三维表面粗糙度对混合润滑条件下动态载荷下滚动轴承瞬态非牛顿响应的影响。该研究分析了在混合润滑条件下动态载荷下滚动轴承的瞬态非牛顿响应，考虑了表面粗糙度参数（如粗糙度方向）以及相对表面粗糙度特征的影响，并探讨了由于润滑剂剪切变薄效应和粘弹性行为导致的流体黏度在薄膜厚度方向及横截面上的变化。通过修改雷诺方程，纳入了表面粗糙度、流体膜内黏度变化以及润滑剂的粘弹性特性。分别采用幂律模型和麦克斯韦模型来表征润滑剂的剪切变薄效应和粘弹性特性。利用有限元方法及适当的迭代算法求解了修正后的平均雷诺方程。结果针对正弦载荷作用下的滚动轴承进行了展示。轴承的瞬态响应受到相对表面粗糙度特性的显著影响。具有固定粗糙度的轴承表现出良好的承载能力。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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