Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Re-assessment of trench effect on fatigue performance of steel catenary risers in the touchdown zone
Abstract Several studies have been published using different trench modeling approaches to investigate the trench effect on fatigue response of steel catenary risers (SCR) in the touchdown zone (TDZ). However, most of the conducted studies have come to contradictory observations and there remains no coherent agreement on the beneficial or detrimental effects of the trench. In this study, a recently developed geometrical model with a set of rules for qualitative assessment of the trench effect on fatigue was used to re-assess the majority of the key published studies. The proposed methodology resulted in a more coherent agreement between the published studies. It was observed that for the near, far, or out of plane direction of the vessel excursions, the ultimate fatigue damage might be slightly increased or decreased depending on the probability of occurrence in different geographical locations. Rather, the trench effect appeared in the form of significant shifting of the peak damage point towards the opposite direction of the low-frequency vessel excursions. The current study revealed several important trends in the trench effect on fatigue and provided an in-depth insight into this challenging problem.
Re-assessment of trench effect on fatigue performance of steel catenary risers in the touchdown zone
Abstract Several studies have been published using different trench modeling approaches to investigate the trench effect on fatigue response of steel catenary risers (SCR) in the touchdown zone (TDZ). However, most of the conducted studies have come to contradictory observations and there remains no coherent agreement on the beneficial or detrimental effects of the trench. In this study, a recently developed geometrical model with a set of rules for qualitative assessment of the trench effect on fatigue was used to re-assess the majority of the key published studies. The proposed methodology resulted in a more coherent agreement between the published studies. It was observed that for the near, far, or out of plane direction of the vessel excursions, the ultimate fatigue damage might be slightly increased or decreased depending on the probability of occurrence in different geographical locations. Rather, the trench effect appeared in the form of significant shifting of the peak damage point towards the opposite direction of the low-frequency vessel excursions. The current study revealed several important trends in the trench effect on fatigue and provided an in-depth insight into this challenging problem.
Re-assessment of trench effect on fatigue performance of steel catenary risers in the touchdown zone
Shoghi, Rahim (Autor:in) / Shiri, Hodjat (Autor:in)
05.11.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2014