That means if we want to simulate the pipeline abandonment and recovery processes in the laboratory, we should make sure that the values of EI/w[L.sup.3] and T/wL of the model are equal to the corresponding values of the actual offshore pipeline operation project.
In offshore engineering the pipeline S-laying, J-laying, abandonment and recovery operations can be all governed by (6) which is suitable for the deepwater situation.
Reasonable boundary conditions for the problem of pipeline abandonment and recovery are that at the TDP the angle and the bending moment are equal to zero and the tension loading is equal to the loading force horizontal component, and at the joint the bending moment is equal to zero.
The similarity criterions for model experiments of pipeline abandonment and recovery are EI/w[L.sup.3] and T/wL.
The suspended pipeline length can be calculated first by approximate formula (12) which can quicken the solving of the pipeline abandonment and recovery problem.
Maier, "Simplified analysis and design of abandonment and recovery of offshore pipelines," Ocean Management, vol.
Datta, "Abandonment and recovery solution of submarine pipelines," Applied Ocean Research, vol.