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Optimization Method of Wing Planform Considering Structural Weight

LI Yu-fei;BAI Jun-qiang;WANG Dan;JU Long;School of Aeronautics,Northwestern Polytechnical University;  
Using engineering beam theory to estimate the wing structure,combined with aerodynamic estimation formula and flight performance estimation formula builds the wing plane shape optimization system. Comparing with the traditional method which uses the empirical equations,this method takes the influence of nacelles,landing gear,fuel,the weight load itself into consideration,so it has a relatively high accuracy. The aim of this paper is to optimize the planar shape of the wing for a wide- body airliner layout,by considering aerodynamic structure. Firstly,we use some certain geometric shape of the plane to parameterize the layout. Then,making the aerodynamics characteristics and structure weight to one deign goal: take- off gross weight by using the method that solving aerodynamic and structural weight coupled. Finally,find the best result by using the genetic algorithm optimization. Comparing to the original take off gross weight,the simulation result reduces 174 kg,which indicates that this method has a certain reference value for aircraft conceptual design to quickly determine the shape of wing plane.
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