OpenPulse: Open Source Software for Pulsation Analysis of Pipeline Systems

Vargas, J. G. Laboratório de Vibrações e Acústica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

Tuozzo, D. M. Laboratório de Vibrações e Acústica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

Kulakauskas, L. V. Q. Laboratório de Vibrações e Acústica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

Fernandes, A. Laboratório de Vibrações e Acústica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

Lenzi, A. Laboratório de Vibrações e Acústica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

Hulse, E. R. Laboratório de Vibrações e Acústica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

Silva, O. M. Laboratório de Vibrações e Acústica, Universidade Federal de Santa Catarina, Florianópolis, SC, Brazil

Abstract

Acoustically Induced Vibration (AIV) can be a cause of failure in gas pipeline systems pressurized by reciprocating compressors. OpenPulse is an open-source software written in Python for numerical modelling of low-frequency AIV. It allows to import the geometry of the pipe system, insert materials properties, set sections, and import pressure/acceleration/force loads (from measurements or theory). The computational procedure performs a time- harmonic acoustic response analysis of the respective ID acoustic domain using the Finite Element Transfer Matrix Method (FETM). The resulting pressure field is applied as a distributed load over the respective structural piping system, modeled with the Timoshenko beam theory and the Finite Element Method (FEM), in order to run a structural time-harmonic response analysis. In addition to simply boundary conditions as constraints on displacements, OpenPulse allows to insert lumped springs, masses and dampers along the domain. This strategy is presented using a simple application with a particular set of boundary conditions, where nodal pressure and displacement frequency plots are presented at some points of the system.

Keywords:

acoustically-induced vibration

pulsation

FEM

FETM.

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