随机噪声模拟下机构部件磨损动态可靠性模型及其求解方法  

Analysis of Dynamic Wear Reliability of Mechanism under Stochastic Noise

作　　者：张峰[1] 南华[1,2] 姚会举[1,3] 吕程诚[1] 

机构地区：[1]西北工业大学力学与土木建筑学院飞行器可靠性工程研究所,陕西西安710129 [2]兰州万里航空机电有限责任公司,甘肃兰州730700 [3]江南机电设计研究所,贵州贵阳550009

出　　处：《兵工学报》2014年第12期2104-2108,共5页Acta Armamentarii

基　　金：高等学校博士学科点专项科研基金项目(20136102120032);高等学校学科创新引智计划项目(B07050);西北工业大学基础研究基金项目(JC20100232)

摘　　要：基于随机动力学理论,开展机构部件磨损动态可靠性的建模,推导了失效概率的求解方法。在机构部件传统磨损分析的基础上,引入白噪声、OU色噪声两种不同类型的随机项来模拟部件磨损过程的动态性和随机性,并以部件动态磨损量和容许磨损量建立磨损动态可靠性模型,推导了动态可靠性基于随机模拟方法和随机泰勒展开方法的求解公式。以某型飞机货桥锁机构为例开展部件磨损动态可靠性分析,验证了所提模型和方法的合理性。A dynamic wear reliability model for a mechanism is established based on stochastic dynamics theory and the failure probability is estimated.On the basis of traditional wear analysis,the slochastic items of white and color noises are used to simulate the dymanic nature and randomness of wear process,and then a limit state function is established by the fact that the dynamic wear loss does not exceed the allowable value.The solving equations of dynamic reliability based on stochastic simulation method and stochastic Taylor expansion method are derived.The proposed method is employed to analyze the dynamic wear reliability of an aircraft cargo bridge and verify the reasonableness of the model and methods.

关 键 词：概率论 机构 磨损 随机噪声 动态可靠性 失效概率 

分 类 号：TB114.3[理学—概率论与数理统计]