Abstract
Fatigue crack is a problem of concerns for offshore structures. This paper studies the utility of information (UoI) based on the monitoring of fatigue crack. A center-crack specimen with an equivalent constant amplitude stress range is considered as an example to simulate the real fatigue load cases. The failure is introduced by an overload that is applied at a random point in time. Two cases are considered: the case where the fatigue crack is unknown (no possibility to act), and the case where the crack is monitored. With monitoring information, structural performance is assessed at high accuracy level in real-time. This would detect overload and cracks to avoid unnecessary repairing activities and failures. The metric of UoI as a generalization of the Value of Information (VoI) is proposed. The two cases are then compared to quantify the utility of the monitoring information based on the improved decisions. The framework of Sustainable and Resilient Based Engineering (SRBE) recently proposed by one of the authors is adopted. Numerical simulation shows the monitoring information is beneficial to detect critical overloading situations.
Originalsprog | Engelsk |
---|---|
Titel | Proc. of the 8th Intl. Symp. on Reliability Engineering and Risk Management (ISRERM 2022) |
Redaktører | Michael Beer, Enrico Zio, Kok-Kwang Phoon, Bilal M. Ayyub |
Forlag | Research Publishing, Singapore |
Publikationsdato | 4 sep. 2022 |
Sider | 662-666 |
Artikelnummer | MS-20-170 |
Kapitel | MS20 Risk-informed Digital Twins of Buildings, Bridges, Offshore Structures: Frameworks, Methods, and Tools |
ISBN (Elektronisk) | 978-981-18-5184-1 (ISBN-13), 981-18-5184-0 (ISBN-10) |
DOI | |
Status | Udgivet - 4 sep. 2022 |
Begivenhed | The International Symposium on Reliability Engineering and Risk Management (ISRERM) - Leibniz University, Hannover, Tyskland Varighed: 4 sep. 2022 → 7 sep. 2022 https://isrerm.org/ |
Konference
Konference | The International Symposium on Reliability Engineering and Risk Management (ISRERM) |
---|---|
Lokation | Leibniz University |
Land/Område | Tyskland |
By | Hannover |
Periode | 04/09/2022 → 07/09/2022 |
Internetadresse |
Bibliografisk note
© 2022 ISRERM 2022 Organisers. All rights reserved.Emneord
- Value of information (VoI), information theory, Utility of Information (UoI)
- Information theory
- Utility of Information (UoI)
- Stiffness reduction
- Fatigue failure
- Fracture mechanics