Global/Local Multidisciplinary Design Optimization of Subsonic Wing

A global/local framework for multidisciplinary optimization of an aircraft wing structure has been developed. The concept of curvilinear stiffening members (spars, ribs and stiffeners) has been applied in the wing structural optimization. A global optimization framework EBF3WingOpt, which integrates the static aeroelastic, flutter and buckling analysis, has been implemented for exploiting the optimal design at the global level. The wing internal structure is optimized using curvilinear spars and ribs (SpaRibs). A two-step optimization approach, which consists of topology optimization with shape design variables and size optimization with thickness design variables, is implemented in EBF3WingOpt. A local panel optimization framework EBF3PanelOpt, which includes stress and buckling evaluation criteria, is performed to optimize the local panels for further structural weight saving. The local panel model is extracted from the global finite element model. The boundary conditions are defined on the edges of local panels using the displacement fields obtained from the global model analysis. The local panels are optimized to satisfy stress and buckling constraints. Stiffened panel with curvilinear stiffeners is implemented in EBF3PanelOpt to improve the buckling resistance of the local panels. The optimization of stiffened panels has been studied and integrated in the local optimization. The global-local optimization framework incorporates global optimization framework EBF3WingOpt and local optimization framework EBF3PanelOpt in an iterative manner. The global-local framework is developed using MATLAB and Python programming to integrate several commercial software: MSC.PATRAN for pre and post processing, MSC.NASTRAN for finite element analysis. The global-local optimization methodology is applied for NASA Common Research Model (CRM) wing. The results have shown the advantage of the multidisciplinary globallocal optimization framework in structural weight saving.

[1]  Christof Büskens,et al.  Global and Local Multidisciplinary Design Optimization of Expendable Launch Vehicles , 2011 .

[2]  Yongcun Zhang,et al.  A two-step optimization scheme for maximum stiffness design of laminated plates based on lamination parameters , 2012 .

[3]  B. Nagel,et al.  Global Local Structural Optimization of Transportation Aircraft Wings , 2010 .

[4]  T Haftka Raphael,et al.  Multidisciplinary aerospace design optimization: survey of recent developments , 1996 .

[5]  Rakesh K. Kapania,et al.  Algorithm Development for Optimization of Arbitrary Geometry Panels using Curvilinear Stieners , 2010 .

[6]  Rakesh K. Kapania,et al.  Integrated Global Wing and Local Panel Optimization of Aircraft Wing , 2015 .

[7]  Raphael T. Haftka,et al.  Response surface approximation of Pareto optimal front in multi-objective optimization , 2007 .

[8]  Karen M. Taminger,et al.  Electron Beam Freeform Fabrication: A Rapid Metal Deposition Process , 2003 .

[9]  Rakesh K. Kapania,et al.  An Artificial Neural Network Residual Kriging Based Surrogate Model for Shape and Size Optimization of a Stiffened Panel , 2013 .

[10]  Genghis Khan,et al.  Multimodal Particle Swarm Optimization: Enhancements and Applications , 2012 .

[11]  George Gerard,et al.  Introduction to structural stability theory , 1962 .

[12]  T.H.G. Megson,et al.  Aircraft structures for engineering students , 1972 .

[13]  Rakesh K. Kapania,et al.  EBF3PanelOpt: An optimization framework for curvilinear blade-stiffened panels , 2013 .

[14]  Roy Hartfield,et al.  Optimization of UAV Designs for Aerodynamic Performance using Genetic Algorithms , 2010 .

[15]  Rakesh K. Kapania,et al.  Wing-Box Weight Optimization Using Curvilinear Spars and Ribs (SpaRibs) , 2011 .

[16]  G. Kreisselmeier,et al.  SYSTEMATIC CONTROL DESIGN BY OPTIMIZING A VECTOR PERFORMANCE INDEX , 1979 .

[17]  J. Sobieszczanski-Sobieski,et al.  Multidisciplinary optimization of a transport aircraft wing using particle swarm optimization , 2004 .

[18]  Jaroslaw Sobieszczanski-Sobieski,et al.  Particle swarm optimization , 2002 .

[19]  Zafer Guerdal,et al.  Optimization of composite box-beam structures including effects of subcomponent interactions , 1994 .

[20]  Rakesh K. Kapania,et al.  Multidisciplinary Optimization of Supersonic Wing Structures Using Curvilinear Spars and Ribs (SpaRibs) , 2013 .

[21]  Anikó Ekárt,et al.  Genetic algorithms in computer aided design , 2003, Comput. Aided Des..