Topological optimization method and system for flexible skin cellular support body of morphing aircraft

Abstract

The invention discloses a topological optimization method and a system for a flexible skin cellular support body of a morphing aircraft, and the method comprises the steps: carrying out the geometricmodeling of a quarter unit cell, and obtaining a first geometric model; constructing a difference model of the first geometric model, obtaining an initial value of xe, and obtaining a first target function according to the initial value of xe; performing first iterative operation on the initial value of the xe to obtain a second result of the xe, obtaining a second target function according to thesecond result of the xe, and judging whether a difference value between the first target function and the second target function is converged in a set range; if yes, ending the calculation, and generating an optimized topological parameter; and if not, carrying out second iterative operation on the second result of the xe to obtain a third result of the xe, and obtaining a third target function according to the third result of the xe until a difference value between two adjacent target functions is converged in a set range. According to the method, the optimal structure of the flexible skin cellular support body of the morphing aircraft under different load working conditions and constraint conditions can be obtained.

Description

technical field [0001] The invention relates to the technical field of variant aircraft, in particular to a topology optimization method and system for a flexible skin cell support body of a variant aircraft. Background technique [0002] As a multi-form aircraft, morphing aircraft has good flight performance in a large airspace range, and has obtained characteristics that traditional fixed-wing aircraft do not have, and has become the basis for the breakthrough development of a new generation of aerospace vehicles. The flexible skin, as an important deformation part of the variant wing airfoil, plays a decisive role in the change of the aerodynamic performance of the variant aircraft. The flexible skin should have a certain degree of flexibility to achieve smooth transition between different airfoils, and at the same time bear the aerodynamic load during flight, which puts forward extremely high requirements for the structural design of the flexible skin. [0003] Among th...

AI Technical Summary

Problems solved by technology

However, the flexible skin based on the above-mentioned single structure has problems such as insufficient deformation capacity, and cannot adapt to various work requirements in an optimal working state, which reduces the working efficiency of the flexible skin.

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