Dears,

I am working on a Sub-sea Riser stress analysis based on DNV(1996),nearly 80 % length of the riser is in sea water. total depth of the water is 71m. the problem is that i can't able to do the analysis with Wave Time period more than 5 seconds,the actual value of wave periode is 10.3 seconds but when i am trying to do with 10.3 seconds,then the itration process has not completing(non converging).

Please let me know the error in my values if enybody know.

thanking you

The first thing to check is if the solution to your wave converged. Use the Wave Wizard and review the table of results. Not all the wave theories converge to a soulution for all values of the wave parameters. If this is the problem, tweak (minor adjustment) the wave parameters.

If the wave solution is acceptable, then you likely have a non-linear boundary convergence issue. Again this is usually solved by making minor adjustments to the model.

If you can't reslove this problem, open a Support Request on eCustomer and send in you job file.

Dear Richard,

Please explain how to check Wave Wizard, and how can i understand the solution is acceptable or not? according to my wave properties the wave theory shall be Stokes theory,if i am changing the wave parameters it should affect the wave theories . please explain this.

Thanks

When you're in the Static Load Case Editor, click on the "Wave" tab and go to the desired "wave vector". Then on the toolbar at the top, click on the button that looks like a small X-Y plot. When the wizard (plot) screen appears, click the button to review the data file, which is the solution to the wave.

When the data file appears in Notepad, review the numbers. Do you see numbers or things like "Nan" or "-$", both of which indicate "no solution".