|dc.description.abstract||Anchor hooking on a subsea pipeline has been investigated in this thesis. Anchor loads on pipelines is in general a rarely occurring event, however, the severity when it occurs could easily jeopardize the integrity of any pipeline. It is considered as an accidental load in the design of pipelines.
Pipeline Loads, limit state criteria and anchor categories are defined by the DNV standards. For pipeline, DNV-OS-F101 (08.2012), Submarine Pipeline Systems is adopted. Offshore standard DNV-RP-E301 Design and Installation of Fluke Anchors and DNV-OS-E301 Position Mooring are adopted for the anchor system analysis.
SIMLA models are established to check whether the pipelines can be hooked by anchors. A short rigid model is established first, which allows efficient parameter studies with respect to pipe diameter, span height, anchor size and chain length to find the circumstances where hooking can take place. Then long pipe models are investigated for selected cases to show the pipeline response curves.||