一种新型登机门开启限速装置的设计

Design of a new opening and speed limiting mechanism of passenger door

登机门是民用飞机舱门中的一个重要部件,其直接影响民用客机结构、功能的完整性和安全性。根据项目研制的需要,针对MA600飞机登机门无阻尼式自由下落导致登机门转轴及舱门损坏的问题进行原因分析,设计了一种限制登机门下落速度的新型开启限速装置。在CATIA中建立了包括登机门、登机梯、开启限速装置在内的虚拟样机模型,在MSC/ADAMS中对安装和未安装开启限速装置的登机门自由坠落进行动力学仿真分析,分析了产品不同设计参数对登机门自由坠落时间的影响,确定出了最优的结构参数,仿真结果表明:所设计的限速装置能够将登机门的坠落时间限制在6 s,有效减少登机门坠落对门体结构冲击,为后续的样件产出和试验提供理论依据。

The passenger door is an important part of the cabin door mechanism of civil aircraft,which directly affects the integrity and safety of the aircraft structure and function.A new opening and limiting device was created to control the falling speed of the passenger door after the causes of the damage to the rotating shaft of the door during the undamped free fall of the MA600 aircraft were investigated in accordance with the needs of the engineering project development.In CATIA,the open speed limiter,passenger door and boarding ladder,and virtual prototype model of the MSC/ADAMS are installed to analyze the dynamics of free falling gate opening speed limiter analysis.The simulation results demonstrate that the designed speed-limiting mechanism can limit the falling time of the gate to 6 s,effectively reduce the impact of the gate falling on the gate structure,and provide a theoretical basis for the sample output and test.