摘要
对腐蚀管道的模糊可靠度计算方法进行了深入研究,提出了确定性可靠度和模糊可靠度两个基本概念;提出了基于断裂失效判据、基于FAD失效评估图和基于剩余强度3种方法计算模糊可靠度的方法;提出了3种新的方法计算确定性可靠度,即改进的JC法、GA-JC法和改进的Monte—Carlo法.以胜利油田某试验区已加入缓蚀剂的注水管道为例,采用本文建立的计算模糊可靠度的3种计算方法和确定性可靠度的3种方法,分别计算注水管道可靠度随着时间的变化趋势.在模糊可靠度的3种计算方法中,基于剩余强度失效方法比较适中,是计算模糊可靠度较好的方法;在确定性可靠度的3种计算方法中,改进的Monte.Carlo法较好.
In this paper, fuzzy reliability methods in the corrosion pipeline are carefully studied. Determining and fuzzy reliability concepts are put forward for the first time. Three methods are brought forward to calculate fuzzy reliability based on fracture failure criterion, FAD failure assessment diagram and residual strength. Three additional methods are proposed to calculate determining reliability, based on modified JC model, modified Monte-Carlo model and modified GA-JC model.
According to the observation in Shengli Oilfield certain experimental zones with corrosion inhibitor, temporal variation of reliability are studied. The case study shows that the method based on residual strength is better than the others for fuzzy reliability and modified Monte-Carlo method is better than the others for determining reliabil-ity.
出处
《力学与实践》
CSCD
北大核心
2004年第1期45-48,共4页
Mechanics in Engineering
