基于故障树分析的飞船检漏间泄漏分析与建模  

Analysis and Modeling of Leak Factors of Spaceship Leak-Testing Room Based on FTA Method

作　　者：贾立德[1] 王金安[1] 杨忠堂[1] 涂国勇[1] 

机构地区：[1]中国酒泉卫星发射中心试验技术部,兰州732750

出　　处：《宇航学报》2012年第6期843-848,共6页Journal of Astronautics

摘　　要：检漏间是飞船在航天发射场进行检漏分析的重要设施设备。在对飞船检漏间的基本结构组成进行分析的基础上,建立了基于小孔泄漏模型的飞船检漏间泄漏过程数学模型,并进行了仿真分析。同时,对飞船检漏间迷宫式密封结构的泄漏途径进行了分析,在此基础上,建立了飞船检漏间泄漏因素的故障树模型。依据该模型,通过分析排查试验,明确了泄漏故障发生的具体位置、泄漏原因以及泄漏机理。在采取针对性维修措施的基础上,飞船检漏间漏率指标达到了平均<100Pa/24h的范围,满足了设计指标<150Pa/24h的要求。实际泄漏检测试验表明:上述方法简单、有效。Leak-testing room is an important equipment for the spaceship leaking analysis in the launching site, First, the basic structure and elements of the spaceship leak-testing rooms are introduced, and the mathematical model of the leaking process is built by using a pinhole-leaking model, and simulated by using MATLAB. After that, the leak paths of the labyrinth packing structure of the spaceship leak-testing room is analyzed, and a failure tree model of all possible leak factors is built. Leaking positions, causes and mechanism are specified through excludable experiments. After the aimed maintenances, the leakage of the spaceship leak-testing room can be controlled in 〈 100Pa/24h, which satisfies the original requirement （ 〈 150Pa/24h）. Experiments indicate that the method is simple and effective.

关 键 词：飞船 检漏间 泄漏 故障树分析 

分 类 号：V46[航空宇航科学与技术—航空宇航制造工程]