Passenger door frame stop fitting is an important component to transfer loads from passenger door to air-frame.The interfacial contact state between stop fitting and door stop greatly affects the load-carrying efficiency and structural reliability.In the interfacial contact process,there exists surface contact deviations from ideal design po-sition between stop fitting and door stop.In order to evaluate the effect of contact deviation on load carrying capaci-ty of door frame stop fitting,an automatic parametric analysis procedure was established by integrating ABAQUS and fatigue analysis tool based on Isight platform.By quantifying stochastic variable with probability distribution model,Monte Carlo sampling method was adopted to obtain random value of different variables,forming a parame-terized automatic analysis process.Through many cyclic sampling and simulation analysis,stress/fatigue life princi-ple was used to analyze static and fatigue strength reliability of stop fitting by considering in-plane surface contact deviation.The results show that the reliability of stop fitting's static and fatigue strength is more than 99.73%pro-vided by 3σ principle within the scope of allowable deviation tolerance,which validates the reasonable dimension design of stop fitting,and this automatic parametric procedure can provide guidance for reliability analysis of other airframe structure.
关键词
登机门框/止动块/接触偏移/静/疲劳强度/可靠性分析
Key words
passenger door frame/stop fitting/contact deviation/static/fatigue strength/reliability analysis
维普
万方数据