表面粗糙度对使用耦合应力流体润滑的瑞利阶梯轴承动态性能的影响

IF 0.8 4区 综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES
N. B. Naduvinamani, Ashwini Angadi
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引用次数: 0

摘要

本文通过挤压作用分析了表面粗糙度对瑞利阶梯轴承动态性能的影响。薄膜区域的非牛顿润滑剂为耦合应力流体。粗糙度是一个具有非零均值、方差和偏度的随机变量。利用耦合应力流体的斯托克构成方程和随机表面粗糙度理论,得到了改进的平均雷诺方程。对于体积流量,稳态特性和动态特性以闭合形式表达,并使用 Mathematica 软件通过辛普森法则进行数值求解。非牛顿耦合应力流体增强(减弱)了稳定承载能力、动态刚度和动态阻尼系数,同时,与牛顿情况相比,负(正)倾斜表面粗糙度要求减少(增加)体积流量。研究了轴承特性相对增加的百分比。研究结果与光滑情况下的结果进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Surface Roughness Influence on the Dynamic Performance of Rayleigh Step Bearing Lubricated with Couplestress Fluid

Surface Roughness Influence on the Dynamic Performance of Rayleigh Step Bearing Lubricated with Couplestress Fluid

Surface Roughness Influence on the Dynamic Performance of Rayleigh Step Bearing Lubricated with Couplestress Fluid

In the present paper, we have analyzed the surface roughness influence on the dynamic performance of Rayleigh step bearing by taking the squeezing action. The non-Newtonian lubricant in the film region considered is a couplestress fluid. A stochastic random variable with a non-zero mean, variance and skewness characterizes the roughness. The improved averaged Reynolds type equation is obtained using constitutive Stoke’s equations for couple stress fluid and stochastic surface roughness theory. For volume flow rate, steady-state characteristics and dynamic characteristics are derived in closed-form expression and are solved numerically by Simpson rule using Mathematica software. The non-Newtonian couplestress fluid enhances (diminishes) the steady load carrying capacity, the dynamic stiffness, and the dynamic damping coefficients, also a decrease (increase) in the volume flow rate is required for negatively (positively) skewed surface roughness in accordance with the Newtonian case. The relative percentage increase in bearing characteristics is studied. The results are considered with that of the smooth case.

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来源期刊
CiteScore
2.60
自引率
0.00%
发文量
37
审稿时长
>12 weeks
期刊介绍: To promote research in all the branches of Science & Technology; and disseminate the knowledge and advancements in Science & Technology
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