Multiobjective optimization in structural design with uncertain parameters and stochastic processes

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

The application of multiobjective optimization techniques to structural design problems involving uncertain parameters and random processes is studied. The design of a cantilever beam with a tip mass subjected to a stochastic base excitation is considered for illustration. Several of the problem parameters are assumed to be random variables and the structural mass, fatigue damage, and negative of natural frequency of vibration are considered for minimization. The solution of this three-criteria design problem is found by using global criterion, utility function, game theory, goal programming, goal attainment, bounded objective function, and lexicographic methods. It is observed that the game theory approach is superior in finding a better optimum solution, assuming the proper balance of the various objective functions. The procedures used in the present investigation are expected to be useful in the design of general dynamic systems involving uncertain parameters, stochastic process, and multiple objectives.

Original languageEnglish (US)
Pages (from-to)1670-1678
Number of pages9
JournalAIAA Journal
Volume22
Issue number11
DOIs
StatePublished - 1984
Externally publishedYes

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Multiobjective optimization
Random processes
Structural design
Game theory
Cantilever beams
Fatigue damage
Random variables
Vibrations (mechanical)
Natural frequencies
Dynamical systems

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Multiobjective optimization in structural design with uncertain parameters and stochastic processes. / Rao, Singiresu S.

In: AIAA Journal, Vol. 22, No. 11, 1984, p. 1670-1678.

Research output: Contribution to journalArticle

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