Multidisciplinary optimization procedure for high speed aircraft using semi-analytical sensitivity analysis procedure and multilevel decomposition

N. Pagaldipti, J. R. Narayan, Aditi Chattopadhyay

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A multidisciplinary design optimization procedure is developed for the simultaneous improvement of sonic boom, aerodynamic and structural performance of high speed aircraft. The coupled problem is decomposed into two levels of optimization. At the first level, optimization is performed for simultaneous reduction in sonic boom and improvements in aerodynamic performance using a nonlinear programming technique. An advanced CFD solver is used to evaluate the supersonic flow field about high speed aircraft configurations. Sonic boom analysis is performed using an extrapolation procedure. The wing structural performance is improved at the second level using a hybrid optimization technique that solves the problem with both continuous and discrete design variables. The wing load carrying member, modeled as a composite box beam, is analyzed using a quasi one dimensional, finite element model. A discrete semi-analytical sensitivity analysis technique is employed for evaluating the aerodynamic and sonic boom design sensitivities. In both levels, the Kreisselmeier-Steinhauser function approach is used to formulate the optimization problems. Results obtained show significant improvements in the sonic boom, the aerodynamic and structural performance, compared to a reference configuration. The use of the semi-analytical sensitivity procedure for calculating aerodynamic and sonic boom sensitivities offers significant savings in computing time.

Original languageEnglish (US)
Title of host publicationCollection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
PublisherAIAA
Pages1479-1493
Number of pages15
Volume3
StatePublished - 1996
EventProceedings of the 1996 37th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Part 4 (of 4) - Salt Lake City, UT, USA
Duration: Apr 15 1996Apr 17 1996

Other

OtherProceedings of the 1996 37th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Part 4 (of 4)
CitySalt Lake City, UT, USA
Period4/15/964/17/96

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ASJC Scopus subject areas

  • Architecture

Cite this

Pagaldipti, N., Narayan, J. R., & Chattopadhyay, A. (1996). Multidisciplinary optimization procedure for high speed aircraft using semi-analytical sensitivity analysis procedure and multilevel decomposition. In Collection of Technical Papers - AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference (Vol. 3, pp. 1479-1493). AIAA.