A quasi-linear method for frictional model in helical layers of bent flexible risers. (January 2017)

• Record Type: Journal Article
• Authors: Zhou, Yang; Vaz, Murilo Augusto
• Is Part Of: Marine structures. Volume 51(2017)
• Page Start: 152
• Page End: 173
• Publication Date: 2017-01
• Subjects: Flexible risers -- Bending behaviour -- Quasi-linear method; Naval architecture -- Periodicals; Offshore structures -- Periodicals; Architecture navale -- Périodiques; Structures offshore -- Périodiques; Naval architecture; Offshore structures; Periodicals; 620.4162
• DOI: 10.1016/j.marstruc.2016.10.004
• Languages: English
• ISSNs: 0951-8339

Abstract

Abstract: This paper deals with the behaviour of two helical layers of bent flexible risers. An analytical model with frictional effects is developed to summarize the mechanical behaviour of helical armour wires. To ensure a unified process of calculation, all formulas are simplified to build up a system of quasi-linear partial differential equations. The numerical solution is determined by finite difference method. Appropriate results are shown in the paper. The geometrical quantities, slips and stresses are matched with other analytical results and found valid. Highlights: An analytical model with frictional effects in helical layers of bent flexible risers is proposed. The derivation is clearly and detailedly demonstrated to show the principle of the mathematical model. All formulas are simplified to build up a system of quasi-linear partial differential equations. The numerical results explain the mechanical behavior and displacements of helical wires.