Under the actual marine environment, slender risers suffer from external ocean current and internal flowing fluid. When the viscosity of internal fluid is included, the riser’s nonlinear dynamic response is worthy of extra concern. This paper adopts a force-decomposition model to simulate VIV hydrodynamic forces, the embroil force, relative inertia force and Coriolis force induced by internal flow are included in the motion equation of marine riser. The internal fluid viscosity in essence affects the relative inertia force and Coriolis force, and its effect has to be considered. The comparable ideal flow with Ui = Ui, max/2 brings the dynamic response closer to the laminar flow case than that with Ui = Ui, max, while Ui = Ui, max/2 underestimates the fatigue damage with internal laminar flow. Generally, the internal laminar flow effect on structural cumulative fatigue damage is more significant than that on dynamic response.
Internal laminar flow effect on the nonlinear dynamic response of marine risers under uniform ocean current
Ships and Offshore Structures ; 17 , 6 ; 1382-1391
2022-06-03
10 pages
Article (Journal)
Electronic Resource
Unknown
Taylor & Francis Verlag | 2023
|Dynamic Response of Marine Risers to Wave-Crest Loads
British Library Conference Proceedings | 1999
|Dynamic response of risers conveying fluid
Tema Archive | 2000
|Nonlinear free vibrations of marine risers/pipes transporting fluid
Tema Archive | 2005
|Nonlinear dynamic and bilinear fatigue reliability analyses of marine risers in deep offshore fields
Taylor & Francis Verlag | 2018
|