Structure Optimization And Research On The Impact Damage Of Composite Airtight Aircraft Door

Composite material has high special strength and special stiffness, which is more and morewidely used in modern aircraft from minor construction to major construction. The research objectof this paper is composite airtight aircraft door, researching the optimization and impact damage ofcomposite aircraft door is valuable to engineering applications.Two-level optimization method is used in this paper, firstly three kinds of reinforced structuretypes of airtight doors are selected, the structure parameters of different reinforced structure typesis optimized. Through Latin experimental design, the sample points of variable geometryparameters are selected by ISIGHT, then parametric modeling is realized by PCL language, andunder the constraint of strength, stiffness and stability of aircraft door, structure parameters forevery sample points are optimized by NASTRAN, aiming at the minimum of weight. Bycomparing weight characteristics of three different structure types, finally [-type reinforcedstiffened plate of airtight doors is selected as its final structure type, and all structural parametersare given.The impact damage of airtight aircraft door was studied by the software of ABAQUS. Severaltypical locations on the [-type reinforced stiffened are selected for its impact damage analysis, thesize of specimen is standard, the influence of impact damage on amount of energy size, stiffen andlocation is studied. Then the residual strength of [-type reinforced stiffened plate after impact wasresearched.