Abstract
Following development of machine design, mathematical models of the machine have to be improved. The most convenient methods are those which create models of separated sub-systems or sub-structures and then assemble them into a whole system. In this way the analysis is clearer, gives opportunities to check and correct dynamical properties of each sub-system before synthesizing and enables the design of better matched systems. It facilitates also on-site correction as the problem subsystem can be easier identified. The purpose of this paper is to present the method of sub-system modelling, show the method of fluid-film force representation, which characterizes a journal bearing for any dynamic conditions, combine this bearing characteristics with component mode synthesis for stability analysis of rotor-bearing system and to demonstrate the application of the computer system MULTI, developed for the IBM-PC for vibration analysis with an example of a vertical pump.
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