报告题目： RISK ASSESSMENT OF STRUCTURAL INTEGRITY AND LIFE ESTIMATION

报告人：Snezana Kirin  副教授 贝尔格莱德大学

邀请人：李 伟

报告时间：2021年4月24日15:50-16:35

腾讯会议ID：886 674 496

报告人简介：隶属于贝尔格莱德大学诺维萨德分校，任机械工程学院创新中心主任，在科研上主要从事数学建模与优化、风险估计与安全管理等课题，具有工业风险与安全管理国际任教资格，发表学术论文80多篇，主持塞尔维亚教育与科学委员会项目一项，主持国际合作项目三项。

报告摘要： Risk assessment procedure based on structural integrity and life estimation has been introduced. The concept based on application of structural integrity and life estimation to assess risk level according to probability and consequence of failure was used. Two case studies are presented, the bucket wheel excavator as an example of static loading, and the oil drilling rig welded pipe as an example of dynamic (fatigue) loading. In the first case structural integrity has been assessed by simple application of the Failure Assessment Diagram (FAD), whereas probability of failure is then taken according to the position of the point in the FAD, obtained by using the Finite Element Method (FEM) to calculate strains and stresses. In the second case, oil drilling rig welded pipe structural life has been estimated by simple integration of the Paris law, as well as by more complex simulation of fatigue crack growth, using the extended Finite Element Method (xFEM). Probability of failure is then taken as the ratio of the number of cycles for a given crack length and the number of cycles for the critical crack length. These analyses are useful for managers to make decision about further use of damaged pipes, based on data provided by engineers. Also, the procedure introduced here for risk assessment is not limited to oil drilling rig pipes, but it is rather a general one, applicable to any component with known geometry, material properties and loading data.