民用飞机翼身对接斜撑板结构分析

斜撑板结构可以充分发挥分散载荷和降低区域应力水平的作用。对不同机型的斜撑板结构的传力特性进行分析,总结斜撑板结构的设计要点。并以某机型选用斜撑板结构的设计为例,提出一种斜撑板结构的改进方案(斜撑板侧边和后梁框刚性连接、下边和对接带板充分连接),并与其他两种设计方案进行对比分析。结果表明:改进方案的斜撑板结构翼上区和舱上区的剪应力分别降低了19%和23%,后梁框的集中载荷降低了67%,结构效率更高、稳定性更好。

Analysis on Trap Panel Structure for Aircraft Outer Wing-fuselage Connection

The trap panel structure is an important part of the aircraft wing body butt structure. It is located in the front end of the landing gear opening, which is connected with the rear beam, and plays the role of spreading the outer wing load to the fuselage. The study of the force transmission characteristics of the trap panel structure is conducive to the design of a reasonable and effective joint structure. The position of trap panel structure in aircraft is introduced, and how to transfer load is analyzed. It is pointed out that the trap panel structure can improve the stress distribution in the rear girder area of the wing. The situation of trap panel structure for civil aircraft is enumerated and analyzed. The trap panel structure of typical model is described, and the trap panel structure with flexible connection and rigid connection is introduced emphatically. Taking the B model as an example, the force and action of the trap panel structure are analyzed. Finally, the main points of the design of the trap panel structure are summarized.