Dynamic loads in piping systems are mainly caused by transient phenomena generated by operating conditions or installed equipment. In most cases these dynamic loads may be modeled as harmonic excitations e.g. pulsating flow. On the other hand, when designing piping systems under dynamic loads, it’s a common practice to neglect strong nonlinearities such as shocks and friction between pipe and support surfaces, mainly because of the excessive cost in terms of computational time and the complexity associated with the integration of the nonlinear equations of motion. However, disregarding these nonlinearities for some systems may result in overestimated dynamic amplitudes leading to incorrect analysis and designs. This paper presents a numerical approach to calculate the steady-state response amplitudes of a piping system subject to harmonic excitations and considering dry friction between the pipe and the support surfaces, without performing a numerical integration. The proposed approach permits the analysis of three dimensional piping systems where the normal forces may vary in time and is based in the Hybrid Frequency-Time Domain method (HFT). Results of the proposed approach are compared and discussed with those of a full integration scheme, confirming that HFT is a valid and computationally feasible option.
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ASME 2013 Pressure Vessels and Piping Conference
July 14–18, 2013
Paris, France
Conference Sponsors:
- Pressure Vessels and Piping Division
- Nondestructive Evaluation Engineering Division
ISBN:
978-0-7918-5567-6
PROCEEDINGS PAPER
Dynamic Response of a Piping System Under Harmonic Excitations Considering Pipe-Support Friction With Variable Normal Loads
José Argüelles,
José Argüelles
Sinclair Knight Merz Ltd., Santiago, Chile
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Euro Casanova
Euro Casanova
Universidad Simón Bolívar, Caracas, Venezuela
Search for other works by this author on:
José Argüelles
Sinclair Knight Merz Ltd., Santiago, Chile
Euro Casanova
Universidad Simón Bolívar, Caracas, Venezuela
Paper No:
PVP2013-97595, V003T03A083; 11 pages
Published Online:
January 17, 2014
Citation
Argüelles, J, & Casanova, E. "Dynamic Response of a Piping System Under Harmonic Excitations Considering Pipe-Support Friction With Variable Normal Loads." Proceedings of the ASME 2013 Pressure Vessels and Piping Conference. Volume 3: Design and Analysis. Paris, France. July 14–18, 2013. V003T03A083. ASME. https://doi.org/10.1115/PVP2013-97595
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