飞机机翼-机身连接结构受力特性分析研究

Research on Mechanical Behavior of Connection between Wing and Fuselage

机翼-机身连接结构作为飞机设计中最重要的一环,应当准确分析其受力特性,合理设计其连接结构。基于有限元计算结果对A、B两种机翼-机身连接结构形式进行受力特性研究,分析表明B结构的机翼后梁后梯形板(或A结构前三角板)分担了部分载荷,减轻了后梁站位加强框承受的载荷。B结构连接刚度相对柔性,减小了后梁处协调变形的影响。A结构设计了后三角板,通过后三角板将起落架部分机构与机身的连接,后三角板分担了部分起落架载荷,对于机身的内力均匀分布是有利的。

The connection between wing on mechanical behavior at Wing-Fuselage and fuselage is very significant in aircraft design. It is necessary to study connection. This paper gives two FE models （A and B） associated with different variants on Wing-Fuselage connection. The resuhs show that ： 1 ） The trapezoidal panel of model B （ or front triangle panel of model A） bears a part of load, reducing the load of the function of frame at rear spar position. Because the Wing-Fuselage connection of model B is more softly, the problem of deformation compatibility at rear spar position will be relieved; 2）The rear triangle panel of model A is beneficial for fuselage panel which is bearing the force from main landing gear, but maybe more weight will be paid.