飞机槽型大开口结构刚度加强研究

为了飞机典型的方舱型机身大开口结构能够满足刚度设计要求，设计了一种对槽型大开口结构增加4个边梁进行刚度加强的设计方案，并构建了工程分析模型，与无开口槽型结构的弯曲刚度及扭转刚度进行了对比研究，得到了两种构型的刚度比，进一步得到了满足一定刚度指标下的边梁面积计算公式，提出了方舱型机身大开口结构刚度设计流程，可以用于方案阶段的飞机大开口结构加强设计。

Study on rigidity strengthening of aircraft slotted large opening structure

in order to meet the aircraft stiffness requirments of the typical rectagular fuselage with large opening, a design scheme of adding four side beams to the groove large opening structure to strengthen the stiffness was designed and its engineering analysis model is constructed. The bending stiffness and torsional stiffness are compared with the typical rectagular fuselage without openings.The stiffness ratio of the two kinds of configuration are obtained, and then the formula for sectional area of side beams are given under a certain stiffness index. Besides, the curves of stiffness ratio with area of side beams and the stiffness strengthen process for rectangular fuselage with large opening are also shown. This study can be used in the scheme phase of the large opening structure plane strengthen design.