In the design of subsea structures providing sufficient dropped object protection (DOP) is of the utmost importance in order to prevent damage to critical equipment, and to protect oil and gas pipelines from severe damage.
Dropped object analysis is considered an accidental case and therefore the structure can be taken into the plastic range, this is to avoid excessive weight, increased cost and over-design.
The main objective of this case study is to demonstrate the simplicity of using the same Sesam model as for in-place design in a non-linear analysis simulating dropped objects. Furthermore, the case study demonstrates the capabilities of non-linear analysis in Sesam.
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