Finite Element Analysis of a Steel Catenary Riser Transporting Gas-Liquid Slug Flow

Autores

  • Igor Fortuna Lima da Silva UFRJ - Universidade Federal do Rio de Janeiro
  • Carlos Eduardo da Silva LAMCE/COPPE/UFRJ
  • Leandro Gazoni LAMCE/COPPE/UFRJ
  • José Luis Drummond Alves LAMCE/COPPE/UFRJ
  • Jian Su LASME/COPPE/UFRJ

DOI:

https://doi.org/10.55592/cilamce.v6i06.8129

Palavras-chave:

Steel Catenary Riser, Riser Transporting Fluid, Slug Flow, Finite Element Method, Dynamic Analysis

Resumo

Steel catenary risers (SCRs) are main offshore structures that transport produced oil and gas from the seabed to floating units such as floating production storage and offloading (FPSO) units. This work analyzes the dynamic behavior of a steel catenary riser transporting internally a gas-liquid slug flow. A finite element formulation for computing elastic large displacement in planar and spatial frames, with consistent numerical implementation, is presented using Updated and Total Lagrangian approaches. To account for geometric changes as external forces are applied, the nonlinear solution is linearized in steps, each representing a load or time step. However, nonlinear terms are included to calculate the stiffness matrix due to the presence of large deformations. The Newmark numerical integrator was used, coupled with the Newton-Raphson method. The two-phase slug flow is model as a homogeneous mixture with timewise and spatially varying density. Numerical results are in good agreement with available experimental data in literature. The effects of the slug flow parameters on the dynamic behavior of the steel catenary riser are investigated.

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Publicado

2024-12-02

Edição

Seção

Advances in Solid and Structural Mechanics