客改货货舱门口框锁钩接头构型研究

The Latch Hook Configuration of Cargo D oor Surrounding Fram e Assem bly for Passenger to Freighter

在某客改货货舱门口框结构中,下主槛梁平面布局与地板平行,且低于地板横梁,需考虑在锁钩接头上设计连接件对地板横梁提供支撑或锁钩接头直接对地板横梁提供支撑。在框站位处,支撑地板横梁的锁钩接头受断框结构影响,导致其结构形式复杂。对几种波音空客成熟机型货舱锁钩接头在装配、受力特性、制造工艺和损伤容限性等方面进行分析比较,针对某客改货货舱口框特殊布局,对锁钩接头构型及其界面进行设计。旨在为客改货货舱口框锁钩接头构型提供一种设计思路。

In cargo door surrounding frame assembly for Passenger to Freighter（ PTF）,the lower main sill is parallel with the floor and lower than floor beam. It needs to design the fittings on the latch hook fitting to support the cross beam of floor panel,or the latch hook fitting supports the cross beam of floor panel directly. The latch hook fitting supporting the cross beam of floor panel is complicated,influenced by the cut-frame at the frame station. Referring to the latch hooks design of Boeing and Airbus mature aircraft cargo bay,this paper analyzes and compares the latch hooks design in assembly,mechanical characteristics,manufacturing process,damage tolerance and so on. Considering the special layout of the cargo door surrounding frame assembly for PTF,this paper makes a design of the latch hook configuration and its interface. Its goal is to provide a design idea for the latch hook configuration for cargo door surrounding frame assembly for PTF.