TY - JOUR
ID - 3338
TI - Fluid-structure interaction due to water-hammer in a pressurized pipeline considering geometrical non-linear behavior of the pipe wall
JO - Amirkabir Journal of Civil Engineering
JA - CEEJ
LA - en
SN - 2588-297X
AU - Mashak, Mohammad Ali
AU - Keramat, Alireza
AD - Department of Hydraulics, Faculty of Civil Engineering, University of Gondi Shapour, Dezful, Iran
AD - Hydraulics, Civil Engneering, Gondi Shapur, Dezful, Iran
Y1 - 2020
PY - 2020
VL - 52
IS - 7
SP - 1651
EP - 1670
KW - Fluid-Structure Interaction
KW - non-linear finite element
KW - Structural stability
KW - Frequency domain solution
KW - water hammer
DO - 10.22060/ceej.2019.15464.5962
N2 - The research investigates a fluid filled pipeline that is connected to a tank at its upstream and to a valve in the downstream and undergoes forces of water hammer due to sudden closure of the valve. The aim is to study the possibility of instability in this pipeline when there are large lateral displacements with small strains. As conventional dynamic analysis models of beams which are based on the infinitesimal strain theory (ε=∂u⁄∂x) cannot reflect the effect of large lateral displacements, in this study axial stresses are modeled as linear stresses and strains are modeled by so called von Karman nonlinear strains. The resulting partial differential equations are solved in the time domain by the finite elements method. The linearized equation of lateral vibration is made dimensionless and then it is solved in the frequency domain so as to plot dimensionless frequencies versus the dimensionless fluid velocities which represent the stability of the pipeline. The results provides useful diagrams to anticipate possible pipeline instability induced by fluid velocity.
UR - https://ceej.aut.ac.ir/article_3338.html
L1 - https://ceej.aut.ac.ir/article_3338_4a58036f77e1f55888f72ded821969bb.pdf
ER -