基于故障树分析的飞船检漏间泄漏分析与建模

摘要

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 tiee 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.%检漏间是飞船在航天发射场进行榆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.