TY - JOUR
T1 - Experimental investigation of transients-induced fluid–structure interaction in a pipeline with multiple-axial supports
AU - Keramat, Alireza
AU - Fathi-Moghadam, Manoochehr
AU - Zanganeh, Roohollah
AU - Rahmanshahi, Mostafa
AU - Tijsseling, Arris S.
AU - Jabbari, Ebrahim
N1 - Funding Information:
All the institutions that the authors are affiliated with are acknowledged.
Publisher Copyright:
© 2019 Elsevier Ltd
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2020/2
Y1 - 2020/2
N2 - Fluid–Structure Interaction (FSI) in pipes can significantly affect pressure fluctuations during water hammer event. In transmission pipelines, anchors with axial stops have an important role in the waterhammer-induced FSI as they can suppress or allow the propagation of additional stress waves in the pipe wall. More specifically, a reduction in the number of axial stops and/or their stiffness causes significant oscillations in the observed pressure signal due to the enhancement of Poisson's coupling. To confirm these physical arguments, this research conducts experimental investigations and then processes the collected pressure signals. The laboratory tests were run on an anchored pipeline with multiple axial supports which some of them removed at some sections to emerge Poisson's coupling. The collected pressure signals are analyzed in the time and frequency domain in order to decipher fluctuations that stem from Poisson coupling and other anchors effects. The analysis of the laboratory data reveals that the pattern of the time signals of pressure is primarily affected by the stiffness and location of the supports. Likewise, the properties of structural boundaries characterize the frequency spectrum of the transient pressures, which is manifested by altering the amplitudes corresponding to dominant frequencies of the system. The study is of particular importance in practice of transient based defect detections and pipe system design.
AB - Fluid–Structure Interaction (FSI) in pipes can significantly affect pressure fluctuations during water hammer event. In transmission pipelines, anchors with axial stops have an important role in the waterhammer-induced FSI as they can suppress or allow the propagation of additional stress waves in the pipe wall. More specifically, a reduction in the number of axial stops and/or their stiffness causes significant oscillations in the observed pressure signal due to the enhancement of Poisson's coupling. To confirm these physical arguments, this research conducts experimental investigations and then processes the collected pressure signals. The laboratory tests were run on an anchored pipeline with multiple axial supports which some of them removed at some sections to emerge Poisson's coupling. The collected pressure signals are analyzed in the time and frequency domain in order to decipher fluctuations that stem from Poisson coupling and other anchors effects. The analysis of the laboratory data reveals that the pattern of the time signals of pressure is primarily affected by the stiffness and location of the supports. Likewise, the properties of structural boundaries characterize the frequency spectrum of the transient pressures, which is manifested by altering the amplitudes corresponding to dominant frequencies of the system. The study is of particular importance in practice of transient based defect detections and pipe system design.
KW - Fluid–structure interaction
KW - Frequency spectrum
KW - Pipeline supports
KW - Waterhammer
UR - http://www.scopus.com/inward/record.url?scp=85077066191&partnerID=8YFLogxK
U2 - 10.1016/j.jfluidstructs.2019.102848
DO - 10.1016/j.jfluidstructs.2019.102848
M3 - Journal article
AN - SCOPUS:85077066191
SN - 0889-9746
VL - 93
JO - Journal of Fluids and Structures
JF - Journal of Fluids and Structures
M1 - 102848
ER -