Accession Number : ADA311908

Title :   Enhanced Aircraft Design Capability for the Automated Structural Optimization System. Phase 1.

Descriptive Note : Final rept. 6 Dec 94-31 Jan 96,

Corporate Author : ACTA INC TORRANCE CA

Personal Author(s) : Hasselman, Timothy K. ; Chen, Xiaoguang ; Herendeen, David L. ; Neill, Douglas J. ; Ewing, Mark S.

PDF Url : ADA311908

Report Date : 31 JAN 1996

Pagination or Media Count : 119

Abstract : This report documents the results of an STTR Phase 1 feasibility study to investigate potential enhancements to the 'Automated Structural Optimization System (ASTROS).' The scope of this feasibility study included (1) developing a robust design capability through probabilistic design optimization, (2) expanding the multidisciplinary optimization (MDO) capabilities of ASTROS, and (3) lining the three primary design stages, i.e., conceptual, preliminary, and detail design. A new method for reliability-based optimization was devised to account for modeling uncertainty in design optimization. Modeling uncertainty is quantified on the basis of ground vibration test and analysis data for generically similar structures. The new method yields the same degree of accuracy as existing methods for a small fraction of the cost. A framework for including manufacturing detail and manufacturing constraints in ASTROS was formulated. A genetic optimization algorithm for optimizing the layout and sizing of structural framing members was demonstrated, thereby helping to automate the interface between conceptual and preliminary design.

Descriptors :   *OPTIMIZATION, *AIRCRAFT DESIGN, DATA BASES, AERODYNAMIC CONFIGURATIONS, MATHEMATICAL MODELS, ALGORITHMS, FIGHTER AIRCRAFT, UNCERTAINTY, VIBRATION, PARAMETRIC ANALYSIS, AIR FORCE RESEARCH, COMPUTER AIDED DESIGN, FINITE ELEMENT ANALYSIS, STRUCTURAL ANALYSIS, COST ESTIMATES, FEASIBILITY STUDIES, STRUCTURAL RESPONSE, CONVERGENCE, DESIGN CRITERIA, AIRCRAFT MODELS, TRANSPORT AIRCRAFT, AERODYNAMICS, NONLINEAR PROGRAMMING, CANTILEVER BEAMS, STRUCTURAL ENGINEERING, WING BOXES.

Subject Categories : Aerodynamics
      Aircraft
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE