Comparison of top tension of catenary

[frozenheartsaber]

Hello,
I made a comparison of Moordyn and Orcaflex for a 6dof offshore platform, and the motion of platforms is well compared. However, the top tension of mooring lines is different. In order to find out the reason, I made a model of a single catenary as provided in the attached file. There is still a difference in that comparison, and I hope to know what the reason will be. If I missed some settings or what else? Thank you for your help.

The attachment file is compressed and needs to be changed to the .rar suffix. I summed the settings used in orcaflex and the MATLAB code in that file.

Comparison.txt

[sanguinariojoe]

Sorry for taking so long to reply, I got really swamped.

You can paste images directly here, on GitHub, no need for this weird .rar way of sharing the data. I suggest you to start simplifying a bit the comparison, because a lot of ingredients can be mixing here. Let's start setting the waves on the same direction of the line, so debugging is way easier.

The first thing I feel a bit odd is that you are evaluating the wave at the beginning of the time step, while I suppose it is more correct to evaluate that 0.5*dt_B later. It should not make a big difference though.