2021 Fiscal Year Annual Research Report

非破壊検査信号の確率論的取扱いによる配管減肉管理高度化方法論の構築

Research Project

Project/Area Number	20J11957
Research Institution	Tohoku University
Principal Investigator	宋海成東北大学, 工学研究科, 特別研究員(DC2)
Project Period (FY)	2020-04-24 – 2022-03-31
Keywords	reliability analysis / pipe wall thinning / fracture mechanics / probability of detection
Outline of Annual Research Achievements	This study aims to develop a pipe reliability analysis framework that is able to incorporate the quantifications of detection uncertainty and sizing uncertainty. A hierarchical Bayesian network was built to represent the conditional relationship among the variables. Accordingly, a Bayesian model was formulated to incorporate the developed multi-variable POD model and the quantification model of estimation error to calibrate the prediction model of wall thinning with nondestructive evaluation data to achieve reasonable reliability analysis.
Research Progress Status	令和3年度が最終年度であるため、記入しない。
Strategy for Future Research Activity	令和3年度が最終年度であるため、記入しない。