Farayandno

Farayandno

Modeling of piping system with dynamic vibration absorber using CAESAR II

Document Type : Original research

Authors
mahdi karimi 1
arash sharifi 2
Naghmeh firoozfam 3
mehrdad shemshadi 4
1 Department of Mechanical Engineering, Bu-Ali Sina University, Hamedan, Iran
2 Department of maintenance, Oil refinery, Kermanshah, Iran
3 Mathematics teacher, Department of Education, Kermanshah, Iran
4 Department of engineering, Oil refinery, Kermanshah , Iran
10.22034/farayandno.2023.556155.1875
Abstract
Vibrations exceeding the permissible limits in piping systems causes cyclic loads that lead to fatigue, damage, and fracture. The present study addresses vibration reduction in an actual piping system in a petroleum refinery. CAESAR II was used to model the piping system based on the maximum displacement and the corresponding frequency. The stresses exerted on the flanges and supports, displacements, natural frequencies, and system mode shapes are obtained from dynamic analysis. To reduce vibrations, we propose a cantilever beam with a lumped mass at the free end (named a “beam DVA” in this paper) as the vibration absorber. CAESAR II’s dynamic analysis results indicate that using an optimal beam DVA can lower pipe displacement by 73%. Next, the beam DVA is constructed and installed in the actual piping system to validate the modeling results. Experimental measurements show that installing the beam DVA reduces the vibration level of the pipe by 69%. Hence, a good agreement exists between the modeling and experimental results.
Keywords
Vibration
Piping System
CAESAR II
Vibration Absorber
[1] Energy Institute, Guidelines for the Avoidance of Vibration Induced Fatigue Failure in Process Pipework, 2nd ed., 2008.
[2] G. B. Song, P. Zhang, L. Y. Li, M. Singla, D. Patil, H. N. Li., 2016. "Vibration Control of a Pipeline Structure Using Pounding Tuned Mass Damper," American Society of Civil Engineers (ASCE), J. Eng. Mech, Article ID04016031.
[3] Seongkyu Chang, Weipeng Sun, Sung GookCho and Dookie Kim., 2016. "Vibration Control of Nuclear Power Plant Piping System Using Stockbridge Damper under Earthquakes," Hindawi Publishing Corporation Science and Technology of Nuclear Installations; Vol. 2016, Article ID5014093.
[4] Yap Huey Tyng, Ong Zhi Chao, Kong Keen Kuan, Zubaidah Ismail, "Similitude Study of an in-Service Industrial Piping System under High Flow Induced Vibration", Journal of Mechanical Science and Technology, Published by Springer. Vol. 31, pp. 3705-3713, 2018.
[5] Mehrdad Shemshadi, Mahdi Karimi, Farzad Veysi, "A Simple Method to Design and Analyze Dynamic Vibration Absorber of Pipeline Structure Using Dimensional Analysis", Journal of Shock and Vibration, Vol. 202, 2018.
[6] M. Jamuna, and K. Ramanathan., "Design and Analysis of Piping System with Supports Using CAESAR-II," International Journal of Computer and Systems Engineering, 10(5), pp. 980-984, 2016
[7] Bhagwat B. Kedar, and Jayshri S. Gulave., "Mitigations to Flow Induced Vibration (FIV) in Control Valve Piping System using Visco-Elastic Damper & Neoprene pads, International Journal of Science Technology & Engineering, 3(7), pp. 40-46, 2017.
[8] Anestis P. and MohamdI A., "Piping Evaluation of Flow Induced Vibrations using Harmonic Loads," Proc. Pressure Vessels and Piping Conference, Prague, Czech Republic, 2018.
[9] Verein Deutscher Ingenieure, Düsseldorf, VDI 3842:2004-6 Vibrations in piping systems, 2004.