Optimized design method for initial size of thin-wall structure for wings and body of aircraft

Abstract

The invention relates to an optimized design method for the initial size of a thin-wall structure for wings and a body of an aircraft. According to the method, the scheme of a thin-wall stiffened plate for the wings and a body of the aircraft in the early stage of the project is determined based on a thin-wall project beam theory. The design of the initial size of the thin-wall stiffened plate isa work with challenge and judgment property, and the subsequent design work is directly influenced when the initial size designed and defined by the scheme is reasonable or not. The ideal thin-wall structure needs to adequately meet the design requirements of static strength design, fatigue damage tolerance design, manufacturing, maintaining and the like. By simplifying any one of an analytical method or a to-be-analyzed structure in the design process of the initial size, the cost benefit of the project can be increased. By further introducing manufacturing and maintaining requirements in thepremise that the static strength requirement is satisfied under the condition that the strength requirement is satisfied, the relatively optimized initial size can be acquired. By defining the initial size of the structure according to the design requirements of manufacturing, maintaining and the like under the condition that the strength requirement is satisfied, the optimized design method canmeet the lightweight design requirement of the structure, and the design efficiency is improved.

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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