Structure Scheme Design And Optimization Of Large Aircraft Under Wing Hanger

The under wing hanger is the connecting part of the aircraft engine and the wing,which is mainly used to transfer the load of the engine and isolate the engine vibration.Large aircraft wing hanger is designed and optimized in this paper.The strength and vibration characteristics of the hanger is also researched.The structure of the under wing hanger is mainly researched from the following three aspects:(1)Referring to the existing hanger structure,the statically indeterminate structure is selected and design a scheme of under wing hanger structure The finite element model of the under wing hanger is set up,including the beam structure model and the solid model.and the model of the post-torsion hanger is established.Among them,the beam structure model is used for size and shape optimization,and the solid model is used for the strength,vibration characteristics analysis and topology optimization of the wing hanger.(2)In order to ensure the safety of the aircraft,the hanger structure must have sufficient strength characteristics.The load of different working conditions of the hanger is introduced,and the strength characteristics of the hanger are analyzed and verified under the condition of the limit load.On this foundation,the windmill of abnormal working condition is analyzed,and the load of the windmill is classified.Under windmill working condition,the strength and vibration characteristics of the hanger are verified.(3)The structure of the wing hanger is optimized.With the variable of section size and the lightest weight as the optimization objective,the size optimization of beam structure model is carried out.The hanging point location is also optimized,with the hanging point location as the optimization objective and the minimum stress as the evaluation standard.Finally,the shape of the hanger is topologically optimized,which obtain the optimal material distribution structure,and the optimization results are compared and verified.