Dynamic response behind an accident occurred in a main WSS

摘要

This paper states an accident occurred in a real main water supply system where the pipe system suffered movements provoking major displacements and leading to the rupture of concrete support blocks. A slow closure of an isolation valve installed in a large suction pipe was the main action. During the inspection procedure after the accident it was found that one valve was slightly corroded (a very small leakage was noticed) and the non-return valve was not isolating well enough. Two numerical models are presented to get approximated solutions for 3D fluid-structure interaction problems by implementing the Galerkin method. The boundary conditions are properly defined for the pipe branch end by applying a spring-damper to suppress part of the pipe system. The one-way model was compared with the two-way model, being equally emphasised which type of integrated analysis (one-way or two-way) is more appropriate, depending on the system characteristics.