Oceaneering International Services|
Engineering Analyst| (1.5 years) Chandigarh| www.oceaneering.com Extreme and global Analysis of Subsea Umbilical: The extreme andglobal analysis is performed on subsea umbilicals in extreme and operational environmental conditions. The analysis is performed in OrcaFlex 9.7. The bend stiffener is designed for umbilicals using different loading cases by using a tool OrcaBend. The umbilicals were modeled and analyzed for different vessel draft and wave headings in different configurations. The different umbilical configurations(steep wave, lazy wave, steep wave, lazy wave etc.) are generated by incorporating buoyancy module properties at respective nodal locations. The analysis is performed in regular and irregular waves in time domain. The result derived insures that the umbilicals are not breaching their respective design limit of axial tension, bending curvature and shear at critical locations. Local stress Analysis of Subsea Umbilical cross section: Local stress Analysis is performed to determine the strength and performance of cross-section against external loads and establish the stiffness parameters required for global analysis. The load capacity curve(allowable tension versus bend curvature plot) for installation and operational condition and Cross-sectional bending and axial stiffness parameters are generated as a result from local stress analysis. The cross section is analyzed using the non-linear finite element software Uflex2d. This enables the umbilical structure to be modeled under a combination of internal and external hydrostatic pressure, tension, torsion, bending, and external contact loads. Internally generated loads due to sliding contact and friction behavior between individual component parts are also represented. Thermal Analysis of Subsea Umbilical: The thermal analysis is performed to evaluate the electrical and thermal performance of Power and Control Umbilical. The analysis determines the heat generated by the MV cables within the Umbilical due to electrical resistance losses and subsequent temperature levels reached by the metallic and plastic components and their sub-components. The analysis is performed in Induction heating module of COMSOL Multiphysics. The analysis ensures that the umbilical components are within the respective design temperature limit.