Optimal Clearance Configuration of Fluid-Film Journal Bearings for Stability Improvement

Author:

Matsuda Koichi1,Kanemitsu Yoichi1,Kijimoto Shinya1

Affiliation:

1. Department of Intelligent Machinery and Systems, Kyushu University, 6-10-1 Hakozaki, Fukuoka 812-8581, Japan

Abstract

This paper aims to optimize a clearance configuration of fluid-film journal bearings. In order to improve stability of a rotating-machinery system, a performance index is given by summing the squared values of the attitude-angles over a region of eccentricity. A Fourier series is used to represent an arbitrary clearance configuration of a bearing, and the problem is to find the Fourier coefficients to minimize the performance index. The problem is numerically solved by a kind of the conjugate gradient method to yield a unique clearance configuration. The optimal clearance configuration is computed for various ratios of length to diameter of a bearing. A rigid-rotor system is used to verify that the designed bearing improves the system stability compared with that of a full circular bearing and to show that this optimization is more effective for shorter bearings.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Reference15 articles.

1. Oyama, A., Obayashi, S., Nakahashi, K., and Nakamura, T., 1998, “Aerodynamic Shape Optimization of a Three-Dimensional Wing by Genetic Algorithm,” Journal of the Japan Society for Aeronautical and Space Sciences, 46, pp. 682–686 (in Japanese).

2. Rodrigues, H., Guedes, J. M., Soto, C. A., and Taylor, J. E., 1999, “An Iterative Model to Design Optimal Two-Material Composite Structures,” Applied Mechanics in the Americas, 6, pp. 251–254.

3. Hashimoto, H., and Imai, T., 1995, “Tribo-Optimum-Design of High Speed Hydrodynamic Bearing Considering the Turbulent Flow in Lubricating Films,” Proceedings of the Japan Society for Mechanical Engineers Dynamics and Design conference, A, pp. 220–223 (in Japanese).

4. Byrne, J., P. Allaire, and S. Carson-Skalak, 1997, “Optimization of Fixed Pad Bearings for Load Capacity, Power Loss, and Rigid Rotor Stability,” Department of Mechanical, Aerospace, and Nuclear Engineering, University of Virginia, Charlottesville, VA, USA, preprint.

5. Hikida, R., 1998, “Optimization of Pressure-Dam Bearings for Dynamic Characteristics,” B.E. thesis, Department of Intelligent Machinery and Systems, Kyushu University, Fukuoka, Japan (in Japanese).

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