论文成果

Numerical study on mode curvature for damage detection of a drilling riser using transfer matrix technique

摘要:In order to prevent marine pipeline accidents caused by corrosion defect, crack or loose contact, the technique of non-destructive testing or examination (NDT or NDE) becomes great important in the flied of structural health monitoring (SHM) in ocean engineering. The objective of this study is to propose a numerical method to localize and size the structure damage of a drilling riser. One theoretical development is a simple and effective algorithm used for ocean risers' mode extraction and damage detection based on the transfer matrix technique. The merits of the developed method are that damage of risers with different boundary conditions and variable cross-sections can be localized and sized. Additionally, the relationships between damage locations and modes are discussed by comparing mode shape difference, mode curvature and mode curvature difference. Numerical results show that mode curvature values of damaged elements have little influence on those of intact elements. Based on this fact, a damage index method is developed to evaluate damage severities and explore the influence of single and multiple damage severities on damage indexes. More importantly, the outcomes are verified to be accurate enough to indicate the feasibility and reliability of the numerical method by the standard FEM package. (C) 2016 Elsevier Ltd. All rights reserved.

关键字:Drilling riser Transfer matrix technique Mode curvature Damage detection

ISSN号:0141-1187

卷、期、页:卷: 63 页: 65-75

发表日期:2017-02-01

影响因子:0.000000

收录情况:SCIE(科学引文索引网络版),ESI(基本科学指标数据库),EI(工程索引)

发表期刊名称:APPLIED OCEAN RESEARCH

参与作者:王冬石

通讯作者:周性坤,刘阳

第一作者:段梦兰,顾继俊

论文类型:期刊论文

论文概要:周性坤,王冬石,段梦兰,顾继俊,刘阳,Numerical study on mode curvature for damage detection of a drilling riser using transfer matrix technique,APPLIED OCEAN RESEARCH,2017,卷: 63 页: 65-75

论文题目:Numerical study on mode curvature for damage detection of a drilling riser using transfer matrix technique