This paper documents the development of a PC-based analysis system that is simple to implement and has an efficient method for presentation of results. The system is composed of several modules that are based on industry-proven capabilities that were originally mainframe programs (in addition to several newly developed programs) and a user-friendly control program that increases the probability of proper data entry and modification. The results of rotor response to unbalance or complex damped eigenvalues can be animated for a never-before-available opportunity to fully understand and observe forward and backward whirl, mixed modes, and the dynamic mode shapes of the turbomachinery.
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Kirk et al. (1999) studied this question.