Finally, Maximum time for pipeline to fail and system response to become greater than the standard level has been calculated. The results indicated that increase in span gap resulted in the increase in pipeline responses, but with the increase in span length, only the lateral displacement exhibited a considerable increment. Master Thesis: Comparisons Study of S-lay and J-lay Methods for Pipeline Installation in Ultra Deep Water. To verify the models, DNV-RP-F111 and results of modeling by SAGE Profile software is used. A preliminary study of the static be-haviour of these cables in function of parameters like mass, bend-ing stiffness, length, water density or seabed friction is presented in this article. characteristics (Orcaflex), further optimization of the mooring system. Theses power cables will be ex-posed to the dynamic behaviour of the platform movements, due to waves, currents and wind. 31 Figure 19 Tension in sway direction at fairlead under the excitation1. in partial fulfillment of the requirements for the degree of. Description of solutions for development of hardware suitable for marine seismic operations in ice covered waters. Submitted to the Office of Graduate Studies of. To model soil and reinforced concrete, nonlinear parameters are considered. I would like to dedicate my thesis to the most important person for me, my son. thesis will contain a segments describing the Finite Element Model (FEM) and the software package OrcaFlex 3D. The FE model is presented using OrcaFlex software including modeling of seabed, pipeline and trawl gear parameters. In this paper, sensitivity analysis is performed on influence of height and span length alternations on the response of pipeline against the traction caused by trawling pull-over load. Trawl gear is one of the main factors in the failure of the submarine pipelines. Submarine pipelines failures lead to oil spills in water and may even lead to explosions with heavy financial and environmental damages.

Orcaflex thesis pdf