Structural Design And Optimization Of A Large-span Flexible Wing Analog Bean

In order to simulate the real hydraulic pipes environment in aircraft wing, it is verynecessary to fabricate a test system, simple in structure relatively and capable ofsimulating the wing’s deformation influence on the hydraulic pipes. This paper studiesthe structural design and optimization design of a large-span flexible wing analog beamin the system, and finally an optimal structure is concluded.Firstly, the key technology involved in the optimization design is discussed. Thenthe optimization design process based on Pro/e and Ansys Workbench is explored. Thepaper mainly studies the collaborative simulation technology between Pro/e and AnsysWorkbench to realize the modeling and transferring of parameters and expounds thedesign of experiments technique in the optimization module Design Explorer.Secondly, a structure optimization design example of a typical I-shaped simplysupported beam is completed. Then a mathematical model of an optimization problemfor the simply supported beam is built. Thereby a comparison of optimization resultsobtained by the multi-objective genetic algorithm with Ansys Workbench and thegradient optimization method with Isight is made. An understanding of themulti-objective genetic algorithm and an application of the optimization technology inAnsys Workbench are deepened through the example.Thirdly, a structural design for the wing analog beam is made. Three schemeswhich are respectively an aluminum tube beam model with uniform cross-sections, asteel plate beam model with uniform cross-sections and a steel plate beam model withvariable cross-sections are proposed. Then the steel plate beam model with variablecross-sections is picked as the initial scheme after their verifications through the finiteelement simulation analysis.Finally, an optimization design for the initial scheme based on the steel plate beammodel with variable cross-sections is conducted. A bi-objective mathematical modelconsidering both sizing optimization and shape optimization for the wing analog beamis built and then its response surface analysis and optimization analysis are made. Lastlyan optimal solution is picked from the Pareto optimal solution aggregate obtained by themulti-objective genetic algorithm optimization. The analysis result indicates that in asatisfaction of strength requirement premise, the accuracy of the deformation displacement curve fitting for the wing analog beam is greatly improved.