| Summary: | 碩士 === 國立成功大學 === 造船及船舶機械工程學系 === 90 === The purpose of this paper is determining the whirling frequency of rotor systems, mounted on oil-film bearings. The rotor is described by a series of shafts and disks. Transfer matrix methods are used to determine the characteristic determinant of system.
In this paper we use the beam of two dimensions to introduce the basic theorem of the transfer matrix method. Then, we use the theory of the beam of three dimensions to derive the transfer matrices of shafts, disks and oil-filmed bearings. Finally, we use the transfer matrix method to determine the characteristic equations, and the minimum corresponding eigenvalues are the whirling frequencies of the rotor-bearing system. In this paper we have the summary discussing with the whirling frequency and critical speed.
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