飞机机翼-机身连接结构受力特性分析研究

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。

Research on Mechanical Behavior of Connection between Wing and Fuselage

The connection between wing and fuselage is very significant in aircraft design. It is necessary to study on mechanical behavior at Wing Fuselage connection. This paper gives two FE models (A and B) associated with different variants on Wing Fuselage connection. The results 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.