A multidisciplinary optimization using semi-analytical sensitivity analysis procedure and multilevel decomposition

Aditi Chattopadhyay, N. Pagaldipti

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

This paper addresses the development of a multidisciplinary optimization procedure using an efficient semi-analytical sensitivity analysis technique and multilevel decomposition for the design of aerospace vehicles. A semi-analytical sensitivity analysis procedure is developed for aerodynamic design sensitivities. Accuracy and efficiency of the sensitivity analysis procedure is established through comparison of the results with those obtained using a finite difference technique. The optimization problem, with the integration of aerodynamics and structures, is decomposed into two levels. Optimization is performed for improved aerodynamic performance at the first level and improved structural performance at the second level. Aerodynamic analysis is performed by solving the three-dimensional parabolized Navier Stokes equations. A nonlinear programming technique and an approximate analysis procedure are used for optimization. The procedure developed is applied to design the wing of a high speed aircraft. Results obtained show significant improvements in the wing aerodynamic and structural performance when compared to a reference or baseline wing configuration. The use of the semi-analytical sensitivity technique provides significant computational savings.

Original languageEnglish (US)
Pages (from-to)55-66
Number of pages12
JournalComputers and Mathematics with Applications
Volume29
Issue number7
DOIs
StatePublished - Apr 1995

Keywords

  • Computational fluid dynamics
  • Multidisciplinary
  • Multilevel decomposition
  • Optimization
  • Semi-analytical
  • Sensitivity analysis

ASJC Scopus subject areas

  • Modeling and Simulation
  • Computational Theory and Mathematics
  • Computational Mathematics

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