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Structural and Multidisciplinary Optimization

, Volume 57, Issue 3, pp 1149–1161 | Cite as

Optimisation of tensile membrane structures under uncertain wind loads using PCE and kriging based metamodels

  • Subhrajit Dutta
  • Siddhartha Ghosh
  • Mandar M. Inamdar
RESEARCH PAPER
  • 390 Downloads

Abstract

Tensile membrane structures (TMS) are light-weight flexible structures that are designed to span long distances with structural efficiency. The stability of a TMS is jeopardised under heavy wind forces due to its inherent flexibility and inability to carry out-of-plane moment and shear. A stable TMS under uncertain wind loads (without any tearing failure) can only be achieved by a proper choice of the initial prestress. In this work, a double-loop reliability-based design optimisation (RBDO) of TMS under uncertain wind load is proposed. Using a sequential polynomial chaos expansion (PCE) and kriging based metamodel, this RBDO reduces the cost of inner-loop reliability analysis involving an intensive finite element solver. The proposed general approach is applied to the RBDO of two benchmark TMS and its computational efficiency is demonstrated through these case studies. The method developed here is suggested for RBDO of large and complex engineering systems requiring costly numerical solution.

Keywords

Reliability-based design optimisation Tensile membrane Metamodel Polynomial chaos expansion Kriging Computation cost 

Notes

Acknowledgements

The second author (SG) would like to thank Prof. Bruno Sudret, IBK, D-BAUG, ETH Zürich, for his lectures and notes on uncertainty quantification using PCE, and for the licence of the UQLab toolbox.

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Structural Safety, Risk & Reliability Lab, Department of Civil EngineeringIndian Institute of Technology BombayMumbaiIndia
  2. 2.Department of Civil EngineeringIndian Institute of Technology BombayMumbaiIndia

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