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Failure mechanism and reliability analysis of the rear cargo door lock of transport aircraft
Engineering Failure Analysis ( IF 4 ) Pub Date : 2021-01-06 , DOI: 10.1016/j.engfailanal.2020.105182
Zhongchao Sun , Tianxiang Yu , Huan Pang , Bifeng Song

The cargo door lock is a critical component of the rear cargo door system of transport aircraft. Malfunction of the cargo door lock may lead to airdrop mission failure or even catastrophic accident. In the reliability test of the rear cargo door system of a transport aircraft, one of the cargo door locks failed to open. However, the failure cannot be remedied by simply strengthening the failed parts. In this work, we analyze the failure mechanism to find out the root cause. Then, the open function reliability is assessed and the local as well as the global reliability sensitivity analysis are performed to interrogate the impacts of the random influence factors. On this basis, the critical random influence factors are identified and accordingly the improvement measures are proposed. After the failed cargo door lock is improved based on the improvement measures, the open function failure didn’t occur again in the subsequent test, verifying the effectiveness of the proposed improvement measures.



中文翻译:

运输飞机后货门锁的失效机理及可靠性分析

货门锁是运输机后货门系统的关键组成部分。货门锁故障可能导致空投任务失败,甚至发生灾难性事故。在运输飞机后部货舱门系统的可靠性测试中,其中一个货舱门锁未能打开。但是,不能仅仅通过加强失效部件来补救失效。在这项工作中,我们分析故障机理以找出根本原因。然后,评估开放功能的可靠性,并进行局部以及全局可靠性敏感性分析,以询问随机影响因素的影响。在此基础上,确定了关键的随机影响因素,并提出了改进措施。

更新日期:2021-01-14
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