飞机双角拉伸接头的刚度可靠性灵敏度分析  

Stiffness reliability sensitivity analysis of aircraftdouble angle tensile joint

作　　者：许新 苏长青 金嘉靖[3] 杜兴盛 XU Xin;SU Changqing;JIN Jiajing;DU Xingsheng(School of Safety Engineering,Shenyang Aerospace University,Shenyang 110136,China;Liaoning Key Laboratory of Aircraft Fire Prevention and Control and Reliability Airworthiness Technology,Shenyang Aerospace University,Shenyang 110136,China;Aerofchina Shenyang Liming Aero Engine Co.,Ltd.,Shenyang 110043,China)

机构地区：[1]沈阳航空航天大学安全工程学院,沈阳110136 [2]沈阳航空航天大学辽宁省飞机火爆防控及可靠性适航技术重点实验室,沈阳110136 [3]中国航发沈阳黎明航空发动机有限责任公司,沈阳110043

出　　处：《兵器装备工程学报》2024年第2期263-268,共6页Journal of Ordnance Equipment Engineering

基　　金：辽宁省自然科学基金计划重点资助项目(20170540691)。

摘　　要：根据双角拉伸接头的结构特征,在ANSYS经典界面中采用自底向上法对双角接头进行建模,在施加水平拉力的作用下得出不同工况的随机参数对接头连接刚度的影响规律,找到对双角接头可靠性影响最大的关键参数为底板厚度。从可靠性的角度出发,根据双角拉伸接头的最大位移不能超过允许值的失效准则,定义双角拉伸接头的极限状态方程。结合灵敏度技术和有限元分析方法,采用拉丁超立方抽样法计算出6种工况下随机参数的可靠性灵敏度,确定随机参数的统计特性对双角拉伸接头可靠性的影响程度。在设计、制造、使用该连接结构时要优先考虑起到积极影响的随机参数并控制起到消极影响的参数。为飞机连接结构的故障预防、结构设计和优化设计提供一定的参考依据。According to the structural characteristics of the double-angle tensile joint,the bottom-up method was used to model the double-angle joint in ANSYS classical interface.Under the effect of horizontal tension,the influence law of random parameters under different working conditions on the joint stiffness was obtained,and the key parameter that had the greatest influence on the reliability of the double-angle joint was found to be the thickness of the bottom plate.From the point of reliability,the limit state equation of double Angle tensile joint is defined according to the failure criterion that the maximum displacement of double Angle tensile joint cannot exceed the allowable value.Combined with sensitivity technique and finite element analysis method,the reliability sensitivity of random parameters under six working conditions was calculated by Latin Hypercube sampling method,and the influence of statistical characteristics of random parameters on the reliability of double-angle tensile joint was determined.In the design,manufacture and use of the connection structure,the positive random parameters should be given priority and the negative parameters should be controlled.It provides some reference for the fault prevention,structure design and optimization design of aircraft connection structure.

关 键 词：双角拉伸接头 连接结构 有限元分析 可靠性灵敏度 拉丁超立方抽样法 

分 类 号：TB114.3[理学—概率论与数理统计]