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Efficient System Reliability Analysis by Finite Element Structural Models

[+] Author Affiliations
Bruno Gaspar, C. Guedes Soares

Technical University of Lisbon, Lisbon, Portugal

Arvid Naess, Bernt J. Leira

Norwegian University of Science & Technology, Trondheim, Norway

Paper No. OMAE2011-49950, pp. 693-702; 10 pages
doi:10.1115/OMAE2011-49950
From:
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 2: Structures, Safety and Reliability
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4434-2
  • Copyright © 2011 by ASME

abstract

In principle, the reliability of complex structural systems can be accurately predicted through Monte Carlo simulation. This method has several attractive features for structural system reliability, the most important being that the system failure criterion is usually relatively easy to check almost irrespective of the complexity of the system. However, the computational cost involved in the simulation may be prohibitive for highly reliable structural systems. In this study a new Monte Carlo based method recently proposed for system reliability estimation that aims at reducing the computational cost is applied. It has been shown that the method provides good estimates for the system failure probability with reduced computational cost. By a numerical example the usefulness and efficiency of the method to estimate the reliability of a system represented by a nonlinear finite element structural model is demonstrated. To reduce the computational cost involved in the nonlinear finite element analysis the method is combined with a response surface model.

Copyright © 2011 by ASME

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