Riser Stress Analysis with Finite Element Approach

This report is written with the main objective to identify the stress distribution along the riser with the inclusion of external loading conditions. This is a further study of riser stress analysis of the data generated with Bentley AutoPIPE as the data received only available in numerical values but not shown in 3-dimensional stress distribution diagram. This can be overcome with ANSYS Multiphysics as 3-dimensional stress distribution result can be generated which are shown in the chapter 4 of this report. PIPE59 element in ANSYS element library is chosen for the modelling process of this project. PIPE59 element is suitable to be practiced for modelling task related to immersed pipe. The simulation is commenced with the input data of a project located at Persian Gulf region. Through the simulation, analysis of the output on how loading conditions affect the riser stress analysis was obtained. The result which includes Von Mises stress and bending stress obtained were compared with the result generated from AutoPIPE, commercial finite element software using in pipeline design industry. This is to justify that ANSYS Multiphysics capable to produce result similar to Bentley AutoPIPE besides output the result in 3-dimensional stress distribution. Lastly, the knowledge gathered from this project can be used to perform riser stress analysis for commercial purpose.