发动机连杆的保守模糊可靠度设计  

Conservative fuzzy reliability design of engine connecting rod

作　　者：王铁[1] 吴净[1] 周淑文[2] 张国忠[2] 巴德纯[2] 

机构地区：[1]沈阳理工大学汽车与交通学院,辽宁沈阳110168 [2]东北大学机械工程与自动化学院,辽宁沈阳110004

出　　处：《航空动力学报》2008年第6期1102-1105,共4页Journal of Aerospace Power

基　　金：国家自然科学基金(59835050);辽宁省博士科研启动项目(20061014);沈阳理工大学博士启动项目(0612)

摘　　要：从强度安全性的角度出发,综合运用概率密度函数联合积分法与功能密度函数积分法,整理并推导了发动机连杆的保守模糊可靠度计算公式,即应力、强度及构件的几何尺寸等参数都为正态分布,隶属度函数为k次抛物线分布时的模糊可靠度计算公式;通过VB编程实现发动机连杆保守模糊可靠度设计数值解的计算.本程序可直接应用于设计计算中,以提高连杆的设计水平.In consideration of the strength and safety, both distribution＇s density and function＇s density were integrated to induce the conservative fuzzy reliability design formulas about engine connecting rod, namely, the stress, strength, geometry dimension of component etc, were normally distributed, and subordinate function was obtained from fuzzy relia-bility design formula in the case of parabola of exponential k; the numeric result about the conservative fuzzy reliability design of engine connecting rod was achieved by VB program in the computer. This program can be used in design of connecting rod to improve the level of design.

关 键 词：航空 航天推进系统 连杆 发动机 可靠性 模糊数学 

分 类 号：V232[航空宇航科学与技术—航空宇航推进理论与工程] TH122[机械工程—机械设计及理论]