民用飞机外翼、中央翼下壁板对接结构分析及试验研究

Structural Analysis and Experiment Study on Lower Panels' Joint of the Wing and Center Wing for Civil Aircraft

对接结构设计是飞机机翼结构设计的重要环节,其设计的优劣关系到飞机的使用寿命和安全性能。在分析国外先进民用客机外翼与中央翼对接结构型式的基础上,设计了两种机翼下壁板与对接肋的连接型式,并对其连接强度和失效模式进行了研究。利用商业有限元软件ANSYS研究拉伸载荷下对接结构的承载能力,根据计算结果针对对接型式进行试验研究,研究其破坏模式及钉载分配。最后,比较分析了两种不同结构型式的破坏模式和载荷分配,为关键连接区的结构细节设计提供方法支持。

The design of wing connection joint is one of the major parts in an aircraft wing design. The quality of the joints plays an important role in the operation safety and use life of an aircraft. Based on the center- outer wing connection joint design of foreign advanced civil aircrafts, two joint specimens were designed for the wing lower panels and joint rib. The connect strength and failure mode of joint specimens were studied. The failure process of the flange/skin interface was simulated by using the cohesive element in the commercial software ANSYS. The re- search results indicated the debonding starting position of different joint specimens. The bearing capacity of joint specimens under pulling force and the bear strength of ibolts were also researched. Finally an effective method was suggested for the design of composite key connection areas after comparing the two structural failure modes and load quantum.