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The cyclic movement of a riser at the touchdown zone (TDZ), which involves complicated pipe–soil interaction, is critical to its long-term safety. Most previous studies have focused on the pipe–soil interaction of the riser in the vertical plane at the TDZ. Therefore, we conducted laboratory tests to investigate the pipe–soil interaction during lateral cyclic pipe movements and the influence of seabed...
Following the suction anchor installation, preloading of the anchor chain has to be carried out to remove slack. The assessment of a pretension level should take into account not only the additional chain slippage that may occur in service, but also the chain tension at the pad-eye which is transferred from the touchdown point (TDP) at the seabed. In this paper, a novel quasi-static model, which has...
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