Parameters of J-lay method for deepwater submarine pipeline

J-lay method is an important method to lay deepwater submarine pipeline. Taking into account geometricnonlinear characteristics of pipeline for J-lay method, finite element model for deepwater J-lay method based on pipe-soilinteraction is set up and relevant parameter studies are conducted based on main influencing factors to provide technicalsupport the J-lay method of deepwater submarine pipeline. As shown from the research results, pipeline stress near thegrounding area will become larger and pipeline top tension smaller when the laying angle is increased, the pipeline stressnear the grounding area will be significantly reduced and the pipeline top tension will be significantly increased whenthe laying depth is increased, pipeline top stress and top tension will become significantly larger when the pipeline wallthickness is increased and soil rigidity affects the form of pipeline near the grounding area but there is little effect on overallpipeline form.