含多位置损伤板剩余强度估计的系统可靠性模型(英文)  

Residual Strength Assessment to Panels with Multiple Site Damage by Method of System Reliability

作　　者：吴宁祥[1] 谢里阳[1] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819

出　　处：《新型工业化》2013年第10期54-60,共7页The Journal of New Industrialization

基　　金：National Natural Science Foundation of China(No.50905031,50775030);Doctoral Program of Higher Education of China(No.20090042120022)

摘　　要：含多位置损伤板的剩余强度估计对老龄化飞机的安全评估有重要意义。本文提出一种估计含MSD结构剩余强度的系统可靠性模型,该模型将结构看作一个载荷共享并联系统,系统中元件为结构中的韧带,施加在结构上的载荷按等应力原则分担在各个元件上,当有元件失效时,各元件承担的载荷重新分布。基于这一模型,本文采用Monte Carlo方法对MSD结构的失效进行仿真,得出结构剩余强度的概率分布,以50%失效概率的失效载荷为剩余强度估计值,估计结果与实验结果相比,多数算例相对误差在10%左右,优于传统的净截面准则。The residual strength prediction and assessment of panels with MSD is very important to aged airplane. This paper presented the load-sharing parallel system reliability model to assess residual strength of this kind of structure. The model treated the structure as a load-sharing parallel system with different type components since different ligaments have different area. The probability distribution of the residual strength of system was derived by Monte Carlo simulation method. The model was verified by test results and most relative errors to test results for this model are about 10 percent.

关 键 词：机械强度 多位置损伤 剩余强度 系统可靠性 

分 类 号：TH114[机械工程—机械设计及理论] V215.7[航空宇航科学与技术—航空宇航推进理论与工程]