Skip to main content Accessibility help
Internet Explorer 11 is being discontinued by Microsoft in August 2021. If you have difficulties viewing the site on Internet Explorer 11 we recommend using a different browser such as Microsoft Edge, Google Chrome, Apple Safari or Mozilla Firefox.

Chapter 14: Reliability-Based Design Optimization

Chapter 14: Reliability-Based Design Optimization

pp. 493-522

Authors

, University of California, Berkeley
Resources available Unlock the full potential of this textbook with additional resources. There are Instructor restricted resources available for this textbook. Explore resources
  • Add bookmark
  • Cite
  • Share

Extract

Chapter 14 develops methods for reliability-based design optimization (RBDO). Three classes of RBDO problems are considered: minimizing the cost of design subject to reliability constraints, maximizing the reliability subject to a cost constraint, and minimizing the cost of design plus the expected cost of failure subject to reliability and other constraints. The solution of these problems requires the coupling of reliability methods with optimization algorithms. Among many solution methods available in the literature, the main focus in this chapter is on a decoupling approach using FORM, which under certain conditions has proven convergence properties. The approach requires the solution of a sequence of decoupled reliability and optimization problems that are shown to gradually approach a near-optimal solution. Both structural component and system problems are considered. An alternative approach employs sampling to compute the failure probability with the number of samples increasing as the optimal solution point is approached. Also described are approaches that make use of surrogate models constructed in the augmented space of random variables and design parameters. Finally, the concept of buffered failure probability is introduced as a measure closely related to the failure probability, which provides a convenient alternative in solving the optimization subproblem.

Keywords

  • Buffered failure probability
  • Constrained optimization
  • Cost function
  • Decoupling
  • Design parameters
  • Expected cost
  • Optimal design
  • Sampling
  • Surrogate models.

About the book

Access options

Review the options below to login to check your access.

Purchase options

eTextbook
US$106.00
Hardback
US$106.00

Have an access code?

To redeem an access code, please log in with your personal login.

If you believe you should have access to this content, please contact your institutional librarian or consult our FAQ page for further information about accessing our content.

Also available to purchase from these educational ebook suppliers