结构耐久性与经济寿命内损伤容限分析及软件  

STRUCTURAL DURABILITY AND DAMAGE TOLERANCE ANALYSIS IN THE ECONOMIC LIFE AND SOFTWARE

作　　者：赵维涛[1] 张旭[1] 王乐[1] 

机构地区：[1]沈阳航空航天大学航空宇航工程学院,沈阳110136

出　　处：《机械强度》2012年第1期102-106,共5页Journal of Mechanical Strength

基　　金：辽宁省教育厅资助项目(2008539)~~

摘　　要：基于耐久性试验数据,给出结构在任意时刻裂纹(相对小裂纹)的概率分布形式,并对结构在经济寿命内进行损伤容限分析,确保结构在经济寿命内的安全性。裂纹的概率分布来源于耐久性试验数据,评估结果比较可靠,避免在经济寿命内进行损伤容限分析时采用假定的裂纹分布。该方法兼顾结构寿命与安全性一体化的要求,并编制相应的计算软件。分析结果表明,在损伤容限分析时即使临界裂纹尺寸大于经济修理极限,在经济寿命内结构仍然存在发生破坏的可能,因此,研究在经济寿命内裂纹的概率分布,并进行损伤容限分析是必要的。软件采用VB语言编写,操作简便,具有良好的应用价值和应用前景。The crack（small cracks） probability distribution of structure is given at any time based on durability test data,and the structure damage tolerance is analyzed to ensure structural security in the economic life.The assessment result is more reliability because it based on the durability test data rather than assumed crack distribution.The integration requirements of structural life and structural safety are considered in the method,and the corresponding calculation software is developed.The results show that the structure still has the possibility of failure even if the critical crack size is greater than the economic maintenance size.Therefore,the study of crack probability distribution and damage tolerance analysis is necessary within the economic life.The software is compiled by VB,easy to use and applicable to engineering structure integration analysis.

关 键 词：飞机结构 耐久性 损伤容限 经济寿命 软件 

分 类 号：V414[航空宇航科学与技术—航空宇航推进理论与工程]