Producing model of a near seabed spanning pipeline based on ANSYS

The finite element model is built up for the spanning pipeline composed of steel pipe and concrete lay by ANSYS software. The PIPE59 element, MATRIX27 element and COMBIN40 element are used to simulate coriolis force and centrifugal force due to internal flowing, and contact between the pipeline and sea bed. The displacements, stresses and natural frequencies of the pipeline are calculated with various span lengths. Then the model is verified by comparing with CAM and DNV engineering codes. The results identify that the ANSYS software can be used to simulate the response of the near-bed pipeline with internal and external flow. The method of building model should be used to engineering easily.