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Theoretical investigation on hub structure design of subsea connectors

Duan, M; Zhang, K; Soares, CG; Paik, JK; (2020) Theoretical investigation on hub structure design of subsea connectors. Thin-Walled Structures , Article 107036. 10.1016/j.tws.2020.107036. (In press).

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Abstract

Subsea processing of oil/gas is performed by production system facilities, which are linked into a complete system by subsea connectors. High reliability and long service life of the connectors, defined by strict requirement of deepwater oil fields, raise the challenge of the design of the structure components to which the ASME-VIII code has been applied. The theoretical design problems of the main parameters of subsea connector's hub structure are detailed in this paper in comparison with the shortage of the ASME design method. Therefore, a new analytical model is developed, and is named stress analytical method (SAM). The hub structure is separated into two parts, i.e. a thick-walled cylinder and a hollow annular plate, and axisymmetric bending deformation problems of the thick-walled cylinder are proposed. The geometric equations, the constitutive equations, the physical equations and the equilibrium equations are developed to obtain the displacement analytical solution of the hub structure's thick-walled cylinder. The deformation continuity relationships between the thick-walled cylinder and the hollow annular plate are also established, and the analytical solutions of internal forces, displacements, rotation angles and stress components are acquired accordingly. The accuracy of SAM is investigated by comparing stress calculation results with Finite Element Method (FEM) results. A case study is carried out to compare SAM with ASME design method.

Type: Article
Title: Theoretical investigation on hub structure design of subsea connectors
DOI: 10.1016/j.tws.2020.107036
Publisher version: https://doi.org/10.1016/j.tws.2020.107036
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Subsea production system, Subsea connector, Thick-walled cylinder, Edge bending moment, Edge shear force, Axisymmetric bending deformation, Stress analytical method
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10116262
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