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Modelling of pipeline integrity taking into account the fluid–structure interaction

✍ Scribed by F. B. Freitas Rachid; H. S. Costa Mattos

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 330 KB
Volume: 28
Category: Article
ISSN: 0271-2091
DOI: 10.1002/(sici)1097-0363(19980815)28:2<337::aid-fld724>3.0.co;2-6

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✦ Synopsis

Two mechanical models have been presented in this paper for structural failure prediction of piping systems conveying liquids subjected to pressure transients. One model takes into account the axial fluid-structure interaction (FSI) phenomenon between fluid and pipe motion, whereas the other refers to an extension of the well-known waterhammer formulation. Both models are described by a system of non-linear hyperbolic equations which are solved by using a numerical procedure based upon the operator splitting technique and Glimm's scheme. To implement Glimm's method, it is presented the solution of a 4 ×4 Riemann problem with discontinuous coefficients. Numerical predictions of both models are presented and compared, so that the influence of the FSI term on the failure analysis is focused on.

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2.2.2, the invariant I 3 was mistakenly identified as 'the third invariant of the Green-Lagrange strain tensor.' It should have been identified as 'the third invariant of the right Cauchy-Green deformation tensor.' The computation reported in the paper was based on that. In Section 4.1.2, the expon