Optimization of complex configuration of catenary risers buoyancy modules

Optimization of complex configuration of catenary risers buoyancy modules

Authors

  • Marcos Diego Siqueira Verçosa Arruda Universidade Federal de Alagoas
  • Michele Agra de Lemos Martins Universidade Federal de Alagoas
  • Eduardo Nobre Lages Universidade Federal de Alagoas

DOI:

https://doi.org/10.5433/1679-0375.2012v33n2p149

Keywords:

Structural optimization, Catenary riser in complex configuration, Genetic Algorithm, Sequential Quadratic Programming

Abstract

Risers are pipes that conduct oil and gas from the subsea wellhead to the floating production unit. For such structures, the pre-sizing approach is usually based on a trial-and-error methodology, fairly dependent on the designer’s experience. The use of catenary risers in complex configuration brings the advantage of overcoming the challenges imposed by deep-water fields for oil exploitation. On the other hand, pre-sizing complexity increases as new design variables are added to define the geometrical parameters of the buoyancy modules attached to a riser intermediary segment. This work presents the pre-sizing approach of catenary risers in complex configuration using optimization techniques for the definition of the riser static equilibrium configuration. Thus, the optimization problem is numerically represented and formulated resulting in a computational application that couples the framework DOOLINES, a simulator for the static and dynamic analysis of mooring lines and risers, with the MATLAB® optimization toolbox, for managing this process, applying a hybrid method, starting with the application of Genetic Algorithms followed by the Sequential Quadratic Programming. A case study is presented and discussed to demonstrate the functionality of this applicative that produces the optimal result according to an objective performance measure.

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Author Biographies

Marcos Diego Siqueira Verçosa Arruda, Universidade Federal de Alagoas

Graduação - Engenharia Civil - 2011 - UFAL

Mestrado - Engenharia Civil/Estruturas - Iniciado em 2012 - UFAL

Michele Agra de Lemos Martins, Universidade Federal de Alagoas

Graduação - Engenharia Civil - 2008 - UFAL

Mestrado - Engenharia Civil/Estruturas - 2011 - UFAL

Eduardo Nobre Lages, Universidade Federal de Alagoas

Graduação - Engenharia Civil - 1989 - UFAL

Mestrado - Engenharia Civil/Estruturas - 1992 - PUC-Rio

Doutorado - Engenharia Civil/Estruturas - 1997 - PUC-Rio

Published

2012-11-30

How to Cite

Arruda, M. D. S. V., Martins, M. A. de L., & Lages, E. N. (2012). Optimization of complex configuration of catenary risers buoyancy modules. Semina: Ciências Exatas E Tecnológicas, 33(2), 149–164. https://doi.org/10.5433/1679-0375.2012v33n2p149

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Original Article
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