Open Access
 Issue JNWPU Volume 40, Number 4, August 2022 909 - 917 https://doi.org/10.1051/jnwpu/20224040909 30 September 2022

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

## 1 机械系统多功能失效描述

 图1多功能机械系统竞争失效分析流程

## 4 案例: 某飞机舱门锁机构

### 4.1 锁机构组成及工作原理分析

 图2锁机构组成
 图3锁机构工作状态

### 4.2 锁机构竞争失效建模

#### 4.2.2 锁机构退化型功能失效建模

Step1   依据运动原理搭建参数化机构动力学仿真模型;

Step2   按照各输入参数的分布(见表 1~3)进行拉丁超立方抽样, 将抽样值代入仿真模型, 得到成组的输入输出;

Step3   利用Step2中得到的结果构造响应面并进行精度验证。

### 4.3 计算结果

 图4开锁过程所需驱动力分布演化图
 图5闭锁过程所需驱动力分布演化图
 图6可靠度变化曲线

## 5 结论

1) 飞机舱门锁机构开闭锁所需驱动力随时间发生演化，且分散性逐渐变大；

2) 本文所提基于Copula函数的考虑失效模式相关性的可靠性分析结果更接近蒙特卡洛方法所得结果，证明本文所提方法的正确性；

3) 针对本文所提案例，Gumbel形式的Copula函数计算结果的RMSE为6.19×10-4，误差最小，更适合于对此案例进行分析。

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## All Figures

 图1多功能机械系统竞争失效分析流程 In the text
 图2锁机构组成 In the text
 图3锁机构工作状态 In the text
 图4开锁过程所需驱动力分布演化图 In the text
 图5闭锁过程所需驱动力分布演化图 In the text
 图6可靠度变化曲线 In the text

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