基于改进ARINC的复杂机械系统可靠性分配方法  

Reliability distribution method of complex mechanical system based on improved ARINC

作　　者：吴红秋 谢里阳[1] 王艺 何雪浤[1] WU Hong-qiu;XIE Li-yang;WANG Yi;HE Xue-hong(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,China;Shenyang Engine Research Institute,Aero Engine Corporation of China,Shenyang 110015,China)

机构地区：[1]东北大学机械工程与自动化学院,辽宁沈阳110819 [2]中国航空发动机集团有限公司沈阳发动机研究所,辽宁沈阳110015

出　　处：《机电工程》2023年第8期1276-1283,共8页Journal of Mechanical & Electrical Engineering

基　　金：国家科技重大专项(J2019-IV-0002-0069)。

摘　　要：在航空发动机静叶调节机构的设计初期,由于缺少完整的失效统计数据,其常常会出现可靠性分配结果不合理或难以分配的现象。针对这一问题,以故障模式、影响和危害性分析(FMECA)评价指标的非线性转换方法为基础,提出了一种基于改进ARINC的复杂机械系统可靠性分配方法。首先,对FMECA分析的失效率评价指标进行了非线性转换,近似地表示出了零件的工作失效率,并结合可靠性关键件的概念,提出了一种改进的ARINC分配方法;然后,提出了使用改进ARINC分配法进行复杂系统可靠性分配的步骤;最后,以静叶调节机构的叶片联动系统为应用实例,使用上述方法和步骤完成其子系统可靠性指标的分配任务;为了验证改进的ARINC方法的优越性,将其与传统ARINC方法进行了对比。研究结果表明:改进的ARINC方法能有效解决实际工程中数据不足,难以科学地分配可靠性的问题,增加了ARINC方法的适用性;与采用传统ARINC方法得到的分配结果相比,通过改进ARINC方法得到的联动半环、联动半环搭接段和叶片摇臂衬套的可靠度分别降低了0.14%、0.33%和0.94%,其分配结果显示了该方法可以给一些关键零件(工作失效率较高、难以保证较高可靠性)分配较低可靠度指标的任务,比传统ARINC方法的分配结果更为合理。At the early stage of the design of aeroengine stator blade regulating mechanism,the reliability assignment results are often unreasonable or difficult to distribute due to the lack of complete failure statistics.To address this problem,a reliability distribution method of complicated mechanical system based on improved ARINC was performed based on the nonlinear conversion method of failure mode,effects and criticality analysis(FMECA)evaluation indexes.Firstly,a nonlinear conversion of the failure rate evaluation index of FMECA analysis was performed to approximate the working failure rate of the part,and an improved ARINC method was proposed by combining the concept of reliability critical parts.Then,the steps of reliability assignment using the improved ARINC assignment method were proposed.Finally,the blade linkage system of the static blade regulating mechanism was used as an example to complete the assignment of its subsystem reliability indexes using the above method and steps.In order to verify the rationality of the improved ARINC method,it was compared with the traditional ARINC method.The research results show that the improvement of ARINC method can effectively solve the problem of insufficient data to scientifically assign reliability in engineering practice,and increase the applicability of ARINC method.Comparing with the assignment results obtained by the traditional ARINC method,the reliability of linkage half-ring,linkage half-ring lap section and blade-rocker bushing obtained by the improved ARINC method is respectively reduced by 0.14%,0.33%and 0.94%.The assignment results show that the method can assign tasks with lower reliability index to some key parts(with high failure rate and difficulties to guarantee the high reliability),and is more reasonable than the traditional ARINC method.

关 键 词：机械系统可靠性分配 ARINC分配法 静叶调节机构 故障模式、影响和危害性分析 可靠性关键件 

分 类 号：TH45[机械工程—机械制造及自动化] V233.95[航空宇航科学与技术—航空宇航推进理论与工程]