Affiliation:
1. Department of Mechanical Engineering, University of Wollongong, NSW 2500, Australia
Abstract
The traditional harmonic excitation method was modified to estimate 16 dynamic force coefficients of two misaligned journal bearings. To avoid the effects of different running conditions on the estimated coefficients, two harmonic forces with different frequencies were excited on the rotor simultaneously and all data were acquired during one test run. The excitation forces and their displacement responses were transferred to the frequency domain in which eight linear (complex) equations are derived. All 16 bearing force coefficients can then be obtained by solving these simultaneous linear equations through one operation. Applicable experimental procedures and data processing techniques are presented. The force coefficients of two circular journal bearings with two axial grooves each are estimated and correlate well with theoretical values when misalignment is considered. Various experimental errors are discussed and the uncertainty in the estimated coefficients is analyzed.
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference10 articles.
1. Kostrzewsky
G. J.
, and FlackR. D., 1990a, “Accuracy Evaluation of Experimentally Derived Dynamic Coefficients of Fluid Film Bearings Part I: Development of Method,” Tribology Transactions, Vol. 33.1, pp. 105–114.
2. Kostrzewsky
G. J.
, and FlackR. D., 1990b, “Accuracy Evaluation of Experimentally Derived Dynamic Coefficients of Fluid Film Bearings Part II: Case Studies,” STLE Tribology Transactions, Vol. 33.1, pp. 115–121.
3. Lund, J. W., and Thomsen, K. K., 1978 “A Calculation Method and Data for the Dynamic Coefficients of Oil-Lubricated Journal Bearings,” Topics in Fluid Bearing and Rotor Bearing System, ASME, pp. 1–28.
4. Parkins
D. W.
, 1979, “Theoretical and Experimental Determination of the Dynamic Characteristics of a Hydrodynamic Journal Bearing,” ASME JOURNAL OF LUBRICATION TECHNOLOGY, Vol. 101, pp. 129–139.
5. Qiu, Z. L., 1994 “A Theoretical and Experimental Research on the Static and Dynamic Characteristics of Hydrodynamic Journal Bearings,” PhD thesis, University of Wollongong, Australia.
Cited by
16 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献