Optimal Design Method for Initial Dimensions of Aircraft Wing and Fuselage Thin-walled Structures

Abstract

The initial size optimization design method of the aircraft wing and fuselage thin-walled structure is based on the theory of thin-walled engineering beams to determine the wing and fuselage thin-walled reinforced panel scheme at the initial stage of the aircraft project. The initial size design of thin-walled and reinforced panels is a challenging and judgmental task. Whether the initial size defined in the scheme design is reasonable will directly affect the subsequent design work. The ideal panel structure should fully meet the design requirements of static strength design, fatigue damage tolerance design, manufacturing and maintenance. During the initial dimensioning process, simplification of either the method of analysis or the structure to be analyzed will improve project cost-effectiveness. In the scheme design stage, on the premise of satisfying the static strength requirements, the manufacturing and maintenance requirements can be further introduced to obtain a more optimized initial size. Under the condition that the strength requirements are met, the initial size definition of the structure is carried out through the design requirements of manufacturing and maintenance, which not only meets the requirements of the lightweight design of the structure, but also improves the design efficiency.

Description

technical field [0001] The invention relates to a method for designing initial dimensions of thin-walled structures of aircraft wings and fuselages such as military aircraft, civil aircraft, space shuttles, and rockets, which can be used for the initial dimension design of general thin-walled reinforced structures, and belongs to the field of thin-walled structure design methods. Background technique [0002] Due to the needs of modern engineering for safety and economy, thin-walled structures widely appear in various engineering structures, such as aviation, aerospace, bridges, shipbuilding, construction and other fields. Thin-walled structures have significant advantages in terms of strength, stiffness, weight and economy, and lighter structural weight can be obtained under the condition of meeting the requirements of strength and stiffness. [0003] The design, manufacture and test technology of thin-walled reinforced structure of aircraft wing and fuselage is one of the ...

AI Technical Summary

Problems solved by technology

Due to time constraints and lack of data, strength engineers did not get involved enough in the scheme formulation and design process, could not provide one or several optimization schemes that meet the strength requirements, and relied too much on Patran&Nastran finite element analysis software

The main reason is that the designers have not thoroughly studied the stiffness and strength of thin-walled structures, and lack of understanding of the assembly and maintenance of wall panels.

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