桥式起重机主梁的非保守模糊可靠度设计  

Non-conservative fuzzy reliability design of overhead traveling crane girder

作　　者：王铁[1] 吴净[1] 周淑文[2] 张国忠[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：《西安建筑科技大学学报（自然科学版）》2008年第3期439-444,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(59835050);沈阳理工大学博士启动项目(0612)

摘　　要：从轻量化和安全性的角度出发,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,整理并推导了桥式起重机主梁的非保守模糊可靠度计算公式,即挠度、许可挠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编程实现桥式起重机主梁非保守模糊可靠度设计的数值解计算,根据输入的原始数据、原函数与积分区间的特点进行积分变换,然后利用中点公式积分法与龙贝格求积法进行积分计算.本程序可直接应用于设计计算中,以提高桥式起重机主梁的设计水平.Considering light-weight and safety, and combining integrations of both the probability density and the function density, the no-conservative fuzzy reliability design formulas about overhead traveling crane girder that deflection, allowed deflection, geometry dimension of component etc. are normal distribution and subordinate is parabola of exponential k were derived; First, the integral change was achieved according to initial data and function imported and extent of integrated. Second, the numerical solution for the no-conservative fuzzy reliability design of overhead traveling crane girder with VB program in the computer was achieved by using middle-points integral calculus and Romberg integration. This program can be used in the design of overhead traveling crane girder for improving the qualities of design.

关 键 词：桥式起重机主梁 非保守设计 轻量化 可靠性 模糊数学 

分 类 号：TB114.3[理学—概率论与数理统计] TH113[理学—数学]