Analyses |
 
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Analyses |
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The pipeline is defined as being 1m above the seabed datum, and so is 0.7m above the highest point of the imperfection. The nodes at the pipeline extremities are fixed in all degrees of freedom. Additional restraints in the vertical direction are applied at regular intervals of 10m along the pipeline to position the pipeline above the seabed.
All constraints imposed on the pipeline are removed, and the pipe is allowed to drop to the seabed under the influence of gravity and buoyancy.
The internal fluid is added to the pipeline. No boundary conditions are applied and the pipeline is restrained by the seabed friction.
Temperature loading is introduced and compressive forces build up in the pipeline.
The influence of slug flow on the pipeline is investigated. Two successive slugs of length 24m, with respective densities of 850kg/m3 and 300kg/m respectively, pass through the pipeline at a speed of 3.0m/s.