Layout optimization design on truss rib structure of civil aircraft center wing

doi:10.19936/j.cnki.2096-8000.20240828.011

Abstract

Abstract: In the lightweight design process of civil aircraft center wing, the truss rib can be used to replace the traditional web rib. However, the research on truss rib structure the center wing lacks quantitative analysis currently, and reasonably arrange the connecting rod structure of truss ribs has become an important engineering issue. Therefore, in order to obtain the optimal structural efficiency of the truss rib, this article proposed 10 configurations of truss rib connecting rod structure with the same diameter. An optimization model is established using HyperSizer, with the minimum structural quality as the optimization objective, and the number of truss rib connecting rods and the connection method as the design variables. By comparing the internal force distribution and structural efficiency of different structure configurations, the influence law of the truss rib is obtained. The results show that when the number of truss rib is less than 9, the weight of the truss rib and the wing panel tend to converge, with a weight reduction of 16.1%. Meanwhile, when the connection scheme is adopted between the truss ribs and the front spar, the truss ribs can share the load borne by the web of front spar, reducing the weight of the front spar and improving the overall structural efficiency of the center wing.

Key words: center wing, truss rib structure, connecting rod stucture, structure layout, optimization design, composites

CLC Number:

TB332

LI Ming, FAN Weichao, SUN Qian, YANG Dongjin, JU Xiangwen, FANG Yaning, WU Ju. Layout optimization design on truss rib structure of civil aircraft center wing[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(8): 75-83.

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