Reliability Assessment for Deteriorating Structure by Markov Chain Model
Reliability Assessment for Deteriorating Structure by Markov Chain Model
复制标题
马尔可夫链模型对劣化结构的可靠性评估
DOI：
10.2534/jjasnaoe1968.1989.166_303
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
M. Iwata
中科院分区：
文献类型：
--
作者：
Y. Fujimoto;Akio Ideguchi;M. Iwata
开发计算机程序来评估结构构件的可靠性，考虑到环境影响（随机载荷、疲劳、腐蚀）导致的抵抗力恶化。马尔可夫链模型（MCM）被用作控制由疲劳裂纹或腐蚀损坏引起的抵抗力恶化的理论。固定式MCM应用于空中结构的可靠性评估。 MCM的初始状态向量考虑了初始缺陷存在的概率和缺陷大小的概率分布。裂纹萌生和扩展过程被纳入单个 MCM 的过渡矩阵中。作为基体的吸收事件（失效事件），考虑关键部件的泄漏失效、塑性塌陷或脆性失效。为了处理随机载荷引起的不确定性，采用边际积分技术。非平稳MCM应用于腐蚀环境下结构的可靠性评估，考虑腐蚀疲劳性能和板厚减少对结构可靠性的影响。使用MCM的优点是在分析中可以方便地处理检验程序。该程序可以评估服役前检验（PSI）和定期或非定期在役检验（ISI）对结构可靠性的影响。该程序适用于实际结构，作为疲劳设计和检验维护的支持系统。
A computer program is developed to assess the reliability of structural members considering the deterioration of resistance due to environmental effects (random loading, fatigue, corrosion).Markov Chain Model (MCM) is applied as the theory which governs deterioration of resistance caused by fatigue crack or corrosion damage. Stationary MCM is applied to the reliability assessment of structures in the air. Probability of existence of initial defects and the probability distribution of the defect size are considered in the initial state vector of MCM. The crack initiation and propagation processes are incorporated into the transition matrix of a single MCM. As the absorbing event (failure event) of the matrix, leak failure, plastic collapse or brittle failure from critical component is considered. In order to deal with the uncertainty due to random load, marginal integration technique is employed. Nonstationary MCM is applied to the reliability assessment of structures in corrosive environment, where the effects of corrosion fatigue properties and the reduction of plate thickness on the reliability of structures are taken into consideration.The advantage of using MCM is that the inspection procedure can be treated easily in the analysis. In the program, effects of pre-service inspection (PSI) and periodic or non-periodic in-service inspections (ISI) on the structural reliability can be evaluated.The program is applicable to the actual structures as a support system for fatigue design and inspection maintenance.
影响因子：
5.4
作者：
NEWMAN, JC;RAJU, IS
通讯作者：
RAJU, IS