Threshold speed of short journal bearings considering the non-Gaussian longitudinal surface roughness
| Autor: | Zhuxin Tian, Bo Li |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 236:2138-2145 |
| ISSN: | 2041-305X 1350-6501 |
| DOI: | 10.1177/13506501221074813 |
| Popis: | During the actual machining process of journal surface, such as milling and fine turning, the surface roughness has strong non-Gaussianity. Thus, the effect of non-Gaussian longitudinal roughness on threshold speed of short journal bearings is investigated in this study. Introducing the parameters of kurtosis and skewness, the model of non-Gaussian surface roughness is established by modifying the Gaussian distribution. It is found that the non-Gaussianity of surface roughness cannot be neglected especially for the journal rotating with a larger eccentricity ratio, the error of Gaussian distribution surface reaches 19.33% when the eccentricity ratio equal 0.7. The increasing of kurtosis would reduce the threshold speed, while the increasing of skewness would enhance the threshold speed. For a larger eccentricity ratio, the effect of kurtosis and skewness on threshold speed is more distinctly. |
| Databáze: | OpenAIRE |
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