臺灣博碩士論文加值系統

本文探討表面粗糙度效應，對於一有限長之部分頸軸承的擠壓薄膜性能之影響。由動量方程式及連續方程式導出雷諾方程式，同時使用隨機模式（Stochastic Models）進一步推導出用以描述均勻等向性（Uniform, Isotropic）粗糙度之隨機雷諾方程式。在解出擠壓薄膜之壓力分佈後，進而可計算出表面粗糙度效應對擠壓薄膜性能之影響。研究結果不管在承載重量或反應時間方面，皆顯示表面粗糙度效應，對擠壓薄膜性能有負面之影響。

The present study examines the surface roughness effects on the squeeze film characteristics of a finite partial journal bearing. We can derive the Reynolds’ equation from the momentum equations and the continuity equation and further adopt the stochastic models to develop the stochastic Reynolds’ equation describing the uniform, isotropic roughness. After obtaining the pressure distribution of the squeeze film, we can calculate the surface roughness effects on the squeeze film characteristics. The results of the study show that the surface roughness effects have negative influence both on the load-carrying capacity or the time-height relationship.

中文摘要
英文摘要
誌謝
目錄
圖目錄
符號說明
第一章 導論
1-1 研究動機與目的
1-2 文獻回顧
1-3 全文架構
第二章 理論分析
2-1 機構描述及基本假設
2-2 統御方程式與邊界條件
2-3 雷諾方程式
2-4 隨機理論
2-5 擠壓薄膜性能
第三章 結果討論
3-1 擠壓薄膜之壓力
3-2 擠壓薄膜之承載重量
3-3 擠壓薄膜之反應時間
3-4 結果比較
第四章 結論與展望
參考文獻
附錄A 隨機理論
附錄B 無限長之部份頸軸承
簡歷

1. Davies, M. G., The Generation of Pressure Between Rough Fluid Lubircated, Moving, Deformable Surfaces, Lubrication Engineering, pp. 246, June 1963.
2. Burton, R. A., Effect of Two-dimensional, Sinusoidal Roughness on the Load Support Characteristics of a Lubricant Film, ASME Journal of Basic Engineering, Vol. 85, pp. 258, June 1963.
3. Tzeng, S. T., and Saibel, E., Surface Roughness Effect on Slider Bearing Lubrication, ASLE Trans., Vol. 10, pp.334, 1967.
4. Christensen, H., and Tonder, K., Tribology of Rough Surfaces: Stochastic Models of Hydrodynamic Lubrication, SINTEF Rep., No. 10/69-18, 1969.
5. Christensen, H., Stochastic Models for Hydrodynamic Lubrication of Rough Surfaces, Proc. Instn. Mech. Engrs., Vol. 55, pp. 1013-1025, 1969-70.
6. Christensen, H., Some Aspects of the Functional Influence of Surface Roughness in Lubrication, WEAR, pp. 149-162, 1971.
7. Christensen, H., and Tonder, K., The Hydrodynamic Lubrication of Rough Bearing Surfaces of Finite Width, ASME Journal of Lubrication Technology, Vol. 93, pp. 324-330, 1971.
8. Christensen, H., and Tonder, K., The Hydrodynamic Lubrication of Rough Journal Bearings, ASME Journal of Lubrication Technology, pp. 166-171, Apr. 1973.
9. Tonder, K., Simulation of the Lubrication of Isotropically Rough Surfaces, ASLE Trans., Vol. 23, No. 3, pp. 326-333, July 1980.
10. Patir, N., and Cheng, H. S., An Average Flow Model for Determining Effects of Three-dimensional Roughness on Partial Hydrodynamic Lubrication, ASME Journal of Lubrication Technology, Vol. 100, pp. 12-17, 1978.
11. Patir, N., and Cheng, H. S., Application of Average Flow Model to Lubrication Between Rough Sliding Surfaces, ASME Journal of Lubrication Technology, Vol. 101, pp. 220-230, 1979.
12. Majumdar, B. C., and Hamrock, B. J., Surface Roughness Effect on Finite Oil Journal Bearings, NASA Tech., Memo. No. 82639, 1981.
13. Greenwood, J. A., and Tripp, J. H., The Contact of Two Nominally Flat Rough Surfaces, Proc. Inst. Mech. Engrs., Vol. 1985, pp. 625-633, 1970-71.
14. Majumdar, B. C., and Ghosh, M. K., Stability of a Rigid Rotor Supported on Rough Oil Journal Bearings, ASME Journal of Tribology, Vol. 112, pp. 73-77, 1990.
15. Ramesh, J. and Majumdar, B. C., Stability of Rough Journal Bearings Using Nonlinear Transient Method, ASME Journal of Tribology, Vol. 117, pp. 691-695, October 1995.
16. Ram Turaga, Stochastic FEM Model of One-dimensional Hydrodynamic Bearings with Rough Surfaces, WEAR, pp. 221-227, 1996.
17. Paul C. Warner, Static and Dynamic Properties of Partial Journal Bearings, ASME Journal of Basic Engineering, pp. 247-257, June 1963.
18. Yu, T. S., and Szevi, A. Z., Partial Journal Bearing Performance in the Laminar Regime, ASME Journal of Lubrication Technology, pp. 94-100, 1975.
19. Vinay Kumar, The Load-carrying Capacity of Plain Finite Partial Journal Bearings in the Turbulent Regime, WEAR, pp. 261-273, 1980.
20. Oscar Pinkus and Beno Sternlicht, Basic Differential Equations, Theory of Hydrodynamic Lubrication, pp. 6, 1972.
21. Lin, J. R., Squeeze Film Characteristics of Long Partial Journal Bearings Lubricated with Couple Stress Fluids, Tribology International, Vol. 30, No. 1, pp. 53-58, 1997.
22. Lin, J. R., Squeeze Film Characteristics of Finite Journal Bearings: Couple Stress Fluid Model, Tribology International, Vol. 31, No. 4, pp. 201-207, 1998.