Preliminary Aerostructural Optimization of a Large Business Jet

An overview of an industrial approach to the aerostructural optimization of a large business jet is presented herein. The optimization methodology is based on the integration of aerodynamic and structural analysis codes that combine computational, analytical, and semi-empirical methods, validated in an aircraft design environment. The aerodynamics subspace is analyzed with a three-dimensional transonic small disturbance code capable of predicting the drag of a complete, trimmed aircraft within engineering accuracy. The design of the wing structure is accomplished using a quasi-analytical method that defines the layout of the ribs and geometry of the spar webs, spar caps, and skin-stringer panels, and predicts the wing flexural properties and weight distribution. In addition, the prediction of operating economics as well as the integrated en route performance is coupled into the scheme by way of fractional change functional transformations. To illustrate the automated design system capabilities, the methodology is applied to the optimization of a large business jet comprising winglets, rear-mounted engines, and a T-tail configuration. The aircraft-level design optimization goal in this instance is to minimize a cost function for a fixed range mission assuming a constant maximum takeoff weight.

[1]  David Kokan,et al.  Application of MD0 to Large Subsonic Transport Aircraft , 2000 .

[2]  T. McGeer.  Wing design for minimum drag with practical constraints , 1984 .

[3]  J. Alonso,et al.  A Coupled-Adjoint Sensitivity Analysis Method for High-Fidelity Aero-Structural Design , 2005 .

[4]  Ilan Kroo,et al.  Collaborative Optimization: Status and Directions , 2000 .

[5]  F. R. Shanley,et al.  Weight-strength analysis of aircraft structures , 1960 .

[6]  Jaroslaw Sobieszczanski-Sobieski,et al.  Multidisciplinary aerospace design optimization - Survey of recent developments , 1996 .

[7]  Askin T. Isikveren,et al.  Identifying Economically Optimal Flight Techniques of Transport Aircraft , 2002 .

[8]  E. Torenbeek,et al.  Synthesis of Subsonic Airplane Design , 1979 .

[9]  Kazuhiro Nakahashi,et al.  High-Fidelity Multidisciplinary Design Optimization of Aerostructural Wing Shape for Regional Jet , 2005 .

[10]  Holt Ashley,et al.  On Making Things the Best-Aeronautical Uses of Optimization , 1982 .

[11]  Kaj Fagervik,et al.  Optimization of an , 1999 .

[12]  Richard J. Balling,et al.  Execution of Multidisciplinary Design Optimization Approaches on Common Test Problems , 1997 .

[13]  F. Kafyeke,et al.  Application of KTRAN Transonic Small Disturbance Code to the Challenger Business Jet Configuration with Winglets , 1988 .

[14]  J. Samareh.  Aerodynamic Shape Optimization Based on Free-form Deformation , 2004 .

[15]  Steve Allwright.  Technical data management for collaborative multi-discipline optimisation , 1996 .

[16]  Vicki S. Johnson,et al.  Minimizing life cycle cost for subsonic commercial aircraft , 1990 .

[17]  Robert Thomas Jones,et al.  The Spanwise Distribution of Lift for Minimum Induced Drag of Wings Having a Given Lift and a Given Bending Moment , 1950 .

[18]  Akira Oyama,et al.  Transonic Wing Shape Optimization Based on Evolutionary Algorithms , 2000, ISHPC.

[19]  Askin T. Isikveren,et al.  Parametric Modeling Techniques in Industrial Conceptual Transport Aircraft Design , 2003 .

[20]  D. J. Farrar,et al.  The Design of Compression Structures for Minimum Weight , 1949, Journal of the Royal Aeronautical Society.

[21]  M. E. Burt,et al.  Weight prediction for wings of box construction , 1955 .

[22]  Antony Jameson,et al.  Aerodynamic Shape Optimization of Complete Aircraft Configurations using Unstructured Grids , 2004 .

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

[24]  Anthony Craig,et al.  Spanload optimization for strength designed lifting surfaces , 1988 .

[25]  Fassi Kafyeke,et al.  'CFD FOR THE AERODYNAMIC DESIGN OF BOMBARDIER'S GLOBAL EXPRESS® HIGH PERFORMANCE JET" , 1997 .

[26]  Sergio Iglesias,et al.  Optimum Spanloads Incorporating Wing Structural Weight , 2001 .

[27]  Ludwig Prandtl,et al.  Applications of Modern Hydrodynamics to Aeronautics , 1923 .

[28]  E. Torenbeek.  Optimum cruise performance of subsonic transport aircraft , 1995 .

[29]  Ilan Kroo,et al.  Subsonic wing planform design using multidisciplinary optimization , 1995 .

[30]  Sean Wakayama,et al.  A simple cost related objective function for MDO of transport aircraft , 1997 .

[31]  Paul Kuhn,et al.  A Summary of Diagonal Tension Part I : Methods of Analysis , 1952 .