Optimum design of stiffened conical shells with natural frequency constraints

Singiresu S Rao, E. S. Reddy

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

The design optimization of axially loaded, simply supported stiffened conical shells for minimum weight is considered, The design variables are thickness of shell wall, thicknesses and depths of rings and stringers, number/spacing of rings and stringers. Natural frequency, overall buckling strength and direct stress constraints are considered in the design problems. Optimization results are obtained by placing the stiffeners inside as well as outside the conical shell. In both these cases, the independent effects of behavior constraints are also studied. The optimum designs are achieved with one of the standard nonlinear constrained optimization techniques (Davidon-Fletcher-Powell method with interior penalty function formulation) and few optimal solutions are checked for the satisfaction of Kuhn-Tucker conditions.

Original languageEnglish
Pages (from-to)103-110
Number of pages8
JournalComputers and Structures
Volume14
Issue number1-2
DOIs
StatePublished - Jan 1 1981
Externally publishedYes

Fingerprint

Stringers
Natural Frequency
Natural frequencies
Shell
Constrained optimization
Stress Constraints
Kuhn-Tucker Conditions
Buckling
Interior Penalty
Ring
Penalty Function
Constrained Optimization
Nonlinear Optimization
Optimization Techniques
Spacing
Optimal Solution
Optimization
Formulation
Optimum design
Design

ASJC Scopus subject areas

  • Computer Science Applications
  • Computational Mechanics

Cite this

Optimum design of stiffened conical shells with natural frequency constraints. / Rao, Singiresu S; Reddy, E. S.

In: Computers and Structures, Vol. 14, No. 1-2, 01.01.1981, p. 103-110.

Research output: Contribution to journalArticle

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