Response analysis with cable3D of the SCR rigid rotation model under the wave action and y direction motion in the oil production and transportation

Abstract

The steel catenary riser(SCR) is an important equipment for offshore oil production. Its research is very important for the safety of oil exploitation. The SCR has a rigid rotation axis from the hanging point to the touch down point(TDP). The influence of rigid body rotation on the response of the cross flow is not negligible. This paper considers the bending vibration model, the rigid body model, and the wave forces mode. The effects of rigid body rotation on the structure acted on wave action and y direction motion is studied. The calculation shows that the response of the structure is the largest in the top area and the structure response value no longer changed greatly after a certain depth. The higher the amplitude in the top region, the faster the response goes down. After coupling top y-direction motion, the phenomenon of decreasing with response of water depth is still present, and the effect of rigid body swing on the structure is not more than that of the wave load. It is expected that the above research can be helpful for the design of steel suspension chain riser.