Global buckling of subsea pipelines with DEH cable

Sammanfattning

Hydrates, wax, and other fluids forms in cold subsea pipelines which restrict flow of petroleum products during operation. This thesis analyses the global buckling behaviour of subsea pipelines with Direct Electric Heating cables (DEH) through a combination of analytical and FEM simulations. A subsea pipeline with an attached DEH cable has limited impact on the pipelines initial global buckling behaviour. The DEH cable holds back and reduces the buckle size. Strap distance and cable rotational location has very limited impact on buckling behaviour. Analytical and FEM model has in places low convergence, this is likely due to limitations in the models.