考虑渐变破坏的导弹吊挂结构疲劳寿命广义可靠性分析  

Fatigue life generalized reliability analysis of the missile suspension structure considering gradual change destruction

作　　者：张峰[1] 何新党[1] 南华[1] 姚会举[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,西安710129

出　　处：《固体火箭技术》2013年第5期672-676,共5页Journal of Solid Rocket Technology

基　　金：国家自然科学基金(51175425);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(JC20100232)

摘　　要：针对某型导弹吊挂结构,开展了考虑渐变破坏的疲劳寿命广义可靠性分析。先建立导弹吊挂结构的有限元分析模型,在静力学和疲劳寿命分析的基础上,利用二次响应面法建立结构疲劳寿命可靠性模型的功能函数。考虑结构疲劳寿命失效的渐变特性,并用隶属函数来描述结构寿命失效的模糊不确定性,结合重要抽样法来求解吊挂结构的广义可靠性。Considering the gradual change process of destruction,a fatigue life generalized reliability analysis method was proposed for the missile suspension structure.Firstly,the finite element model of missile suspension structure was built.Based on statics and fatigue life analysis,the performance function of structural fatigue life reliability analysis model was approximated by response surface method.Considering gradual change characteristic of structure fatigue life failure,membership function was used to describe the fuzzy uncertainty of structure life failure,and importance sampling method was used to perform the generalized reliability analysis for suspension structure.

关 键 词：导弹吊挂结构 疲劳寿命 响应面法 广义可靠性 重要抽样法 

分 类 号：TJ760.3[兵器科学与技术—武器系统与运用工程]