Automated optimisation of suction caisson foundations using a computationally efficient elastoplastic Winkler model

S. K. Suryasentana, B. W. Byrne, H. J. Burd

Research output: Contribution to conferencePaperpeer-review

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Abstract

This paper describes an automated approach for determining the optimal dimensions (length and diameter) of a suction caisson foundation subject to lateral loads, to minimise the foundation weight, whilst satisfying installation requirements, serviceability and ultimate limit states. The design problem was cast as a constrained optimisation problem. Solutions were initially developed using a graphical approach; the solution process was then repeated with an automated approach using an optimisation solver. Both approaches were feasible because a computationally efficient elastoplastic Winkler model was used to model the suction caisson foundation behavior under applied loading. The automated approach was found to be fast and reasonably accurate (when compared to more computationally expensive design procedures using three-dimensional finite element analyses). The benefits of this approach, made possible by the efficiency of the models employed, include better design outcomes and reduced design time.
Original languageEnglish
Pages932-941
Number of pages10
DOIs
Publication statusPublished - 1 Oct 2019
EventCoastal Structures Conference 2019 - Hamburg, Germany
Duration: 1 Oct 2019 → …

Conference

ConferenceCoastal Structures Conference 2019
Country/TerritoryGermany
CityHamburg
Period1/10/19 → …

Keywords

  • elastoplastic winkler model
  • suction bucket
  • suction caisson
  • offshore engineering
  • finite-element
  • optimisation

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