Evaluate the eect of a 100 year wave on the risers. This was applied in two ways; rst using the prescribed displacements provided by the structural analysis, and then including the structural member in the analysis instead. Local buckling check to DNV-OS-F101 part D. This used the results of the extreme wave analysis given above. Case Study: Severed structural member analysis The problem A crack was identied on a diagonal structural member of a platform jacket structure located in the northern North Sea during a 2015 subsea survey. Connected to this member are two major export risers; 24” oil export and 20” gas export. Following identication of the crack, the client performed an analysis of the structure to determine the expected deection of the riser guides if the member were to

Join for free to read