Mooring systems integrity management technologies
Notice bibliographique
Résumé
The MooringSense project aims to reducing OPEX and increasing efficiency of FOWT through the development of efficient risk-based integrity management strategies for mooring systems based on a cost effective and reliable on-line monitoring technology and digital twin. This deliverable provides an overview of the state-of-the-art of current technologies, tools and techniques related to integrity management of mooring systems currently applied to the O&G industry, from the perspective of FOW, with the aim of identifying the technological gaps applied to the integrity management of mooring systems. In the first instance, it shall be highlighted that the purpose of a mooring system in both O&G and FOW is station keeping, namely to keep a floating structure within reasonable proximity of a designated location and to avoid excessive movement that will hinder safe operation. In the O&G industry, mooring systems have been utilized for many years and there is a level of understanding of vessel motion and wave interaction that is significantly higher compared to the concepts employed by the floating offshore renewables sector. Although this can be seen as a weakness, the FOW industry can leverage the O&G experience to ensure that reliable and cost-effective solutions are employed. However, a key difference when comparing a mooring system for a traditional O&G installation (i.e. a semisubmersible or an FPSO) and a FOW farm is in the number of mooring lines. A traditional O&G installation will generally comprise of a limited number of mooring lines (i.e.10-30); however, for a medium size FOW of 50 FOWT, each turbine will have 3 to 6 mooring with a total number in the range of 150-300. Given the high cost of offshore operations (inspection, maintenance, repairs) it is of vital importance that a cost-effective integrity management strategy is implemented to keep OPEX at an acceptable level. This deliverable details the key aspect related to integrity management of mooring system including degradation mechanism in chain, wire ropes and synthetic ropes; inspection and integrity management techniques; failure detection, line tension monitoring, control algorithms and digital twin. In addition, the deliverables highlight some technological gaps, which are summarised below: With regards to international standards and guidelines, there is a clear need for tailored documentation focusing on the challenges of FOW and, in particular, there is the need of a tailored risk-based approach that can be applied to the FOW industry to enhance the effective operation of the floating structures whilst reducing costs. SHM for monitoring the integrity of FOW substructures is in the development phase. First systems are available on the market, but there are reasonable doubts regarding their reliability and robustness, and local inspection remains necessary for making decisions on O&M. Effective mooring line failure detection systems are still required. Work on the exploitation of novel sensors such as those proposed in this project is not abundant, for obvious reasons. More generally, the relationship between turbine control, platform position and mooring line loads requires careful study. Several monitoring technologies are available today to provide mooring line tension measurements in floating platform as a source of information for integrity assessment and management. However, these technologies present several issues related to robustness and reliability, as well as costs if they are to be applied to FOW, where long term operation and low cost are mandatory requirements Designing and implementing a Digital Twin of a mooring line requires simultaneous adoption of several technologies and tools. Some of these technologies are still at early stage of development however are evolving at fast pace.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,002 | 0,003 |
| Méta-épidémiologie (sens strict) | 0,001 | 0,001 |
| Méta-épidémiologie (sens large) | 0,001 | 0,001 |
| Bibliométrie | 0,003 | 0,001 |
| Études des sciences et des technologies | 0,001 | 0,001 |
| Communication savante | 0,004 | 0,005 |
| Science ouverte | 0,003 | 0,005 |
| Intégrité de la recherche | 0,002 | 0,002 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,024 | 0,018 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».