CAJ | 학술논문

疲劳主要失效模式识别是结构系统疲劳可靠性理论研究的主要内容之一。本文研究了腐蚀环境下结构系统疲劳主要失效模式识别方法：（1）建立了腐蚀环境下结构元部件损伤随机模型，对该模型的适用性作了讨论；（2）研究了识别结构系统疲劳主要失效模式的全局分枝约界法，与结构元部件损伤随机模型结合，实现腐蚀环境下结构系统疲劳主要失效模式识别，并对算法执行过程作了调整；（3）引入了一种安全裕量方程确定方法。理论分析和数值算例表明，本文所提算法可实现腐蚀环境下结构系统疲劳主要失效模式识别。
피로주요실효모식식별시결구계통피로가고성이론연구적주요내용지일。본문연구료부식배경하결구계통피로주요실효모식식별방법：（1）건립료부식배경하결구원부건손상수궤모형，대해모형적괄용성작료토론；（2）연구료식별결구계통피로주요실효모식적전국분지약계법，여결구원부건손상수궤모형결합，실현부식배경하결구계통피로주요실효모식식별，병대산법집행과정작료조정；（3）인입료일충안전유량방정학정방법。이론분석화수치산례표명，본문소제산법가실현부식배경하결구계통피로주요실효모식식별。
Structural fatigue failure mode identification is one of the most important part of the structural system fatigue reliability theory .In this paper ,a structural system fatigue failure mode identification method was proposed ,which considered the corrosion factor .The corrosion fatigue damage model for structural component was introduced .The applicability of the model was also discussed .Some improve‐ments for the global branching and bounding algorithm were made .As a result of the improvements ,the algorithm could be adjusted to deal with both the non‐corrosive and corrosive fatigue reliability problem . A method to determine the safety margin equation was also suggested .The oretical analysis and numeri‐cal example both revealed that the proposed method can be used in structural corrosion fatigue reliability analy sis .