VAPSIMM: A Computer Program for Vibration Analysis of Piping Systems Incorporating a Moving Medium
The theory and structure of a computer program, VAPSIMM, for the vibration and stability analysis of piping systems containing a moving medium, are outlined in this paper. VAPSIMM is based on the transfer matrix method in which the order of the transfer matrix is kept unchanged with increasing number of piping elements and complexity of the system, and every piping element is considered as a distributed-parameter model. Computed and experimental results of resonant frequencies for various flow velocities of the contained medium from a laboratory model of an elbow pipe are presented to show the accuracy. Selected computed results for three-dimensional and helical piping elements are also presented to demonstrate the capability of the program.
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