![]() Installation also plays an important and vital role. Therefore in the next step we introduce various installation methods for offshore pipelines and what may govern the choice of an installation method / scenario. Then guidelines and constrains for establishing the different installation methods are matters of our concerns. Calculations for two different cases related to documenting installation of steel pipelines and flexible pipelines in sideway current are included. The S-lay pipeline installation method will be taken for the analysis in the 2 case study of this thesis. First step is a static analysis and the second is a dynamic analysis. Fortunately the program OrcaFlex is capable to do both analyses. The stinger elements are modeled as points which are held by links/tethers in both vertical and lateral directions. The links are restricted to only accept tension forces without any shear forces or bending moments. The idea is that these links will act as “roller” restraints. Tension forces in a vertical link will represent stinger roller reactions when the pipe is sitting on the roller, and zero force will represent a pipe lift-off. Same criteria apply to the lateral links. Change background color in orcaflex series#.Change background color in orcaflex software#.Change background color in orcaflex how to#.
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