Topology optimization including inequality buoyancy constraints

R. Picelli, R. Van Dijk, W. M. Vicente, R. Pavanello, M. Langelaar, F. Van Keulen

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

Abstract

This paper presents an evolutionary topology optimization method for applications in design of completely submerged buoyant devices with design-dependent fluid pressure loading. This type of structures aid rig installations and pipeline transportation in all water depths in offshore structural engineering. The proposed optimization method seeks the buoy design that presents higher stiffness, less material and a prescribed buoyancy effect. A hydrostatic fluid is used to simulate the underwater pressure and the polymer buoyancy module is considered linearly elastic. Both domains are solved with the finite element method. From the initial design domain, solid elements with low strain energy are iteratively removed until a certain prescribed volume fraction. The studied case consists in a buoy for supporting subsea oil pipelines, in which the inner diameter is constant and the outer shape and interior holes are defined by the optimization algorithm. A new buoyancy constraint is introduced in order to guarantee a satisfactory buoyancy effect.

Original languageEnglish
Title of host publicationProceedings WCCM 2014, ECCM 2014 and ECFD 2014
EditorsA Huerta, E Onate, X Oliver
Place of PublicationBarcelona, Spain
PublisherInternational Center for Numerical Methods in Engineering
Pages3590-3601
ISBN (Electronic)9788494284472
Publication statusPublished - 2014
EventJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014 - Barcelona, Spain
Duration: 20 Jul 201425 Jul 2014

Conference

ConferenceJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014
CountrySpain
CityBarcelona
Period20/07/1425/07/14

Keywords

  • BESO method
  • Buoyancy
  • Buoyant structures
  • Subsea buoyancy modules
  • Topology optimization

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