Problem exporting to Michlet

[Pascal Schumacher]

Hello everybody,

I’m using DS_free (I’m new to the program but have experience with creating models). I am experiencing problems when exporting to Michlet to get an estimation of the resistance of the hull (which is an easy mono-hull btw.). In Delftship everything seems normal, I can click through the windows when exporting and enter the needed values for the .mlt-file.

But when I open the mlt-file in some text-editor to check the values, all values are zero (e.g. Gravity, density but also length or draught of the model and many more) – the offset-table on the other hand looks fine.

The problem does not only occur with my model – I checked a few models from the download-section and the problem occured with every one.

I can get results from Michlet if I enter the values manually, but that doesn’t seem to be the sense of the export-function 😉

Is there something I have to keep in mind when creating a model? Does anybody else experience this problem?

Thanks for your help in advance!

[Leo Lazauskas]

But when I open the mlt-file in some text-editor to check the values, all values are zero (e.g. Gravity, density but also length or draught of the model and many more) – the offset-table on the other hand looks fine.

The problem does not only occur with my model – I checked a few models from the download-section and the problem occured with every one.

I have never seen that problem. (I wrote Michlet, btw)
On rare occasions I get a messed up offset table, but that can be fixed by choosing a different number of waterlines or stations.

I hope somebody can help you because I am currently working on using Delfship/Michlet exported files as input to some other computer programs that calculate dynamic sinkage and trim, near-field wave patterns and fluid velocities.
Good luck,
Leo.

[Pascal Schumacher]

To me it seems that the problem must be in DelftShip (maybe because I use the free version?), since Michlet works fine.

Thanks a lot by the way for Michlet, Leo, since I am studying naval architecture you can be sure that I appreciate it. I read the manual and documentation – is there maybe some description how Michlet calculates the resistance? I’m just asking out of curiosity and to be able to judge the results.

[Leo Lazauskas]

To me it seems that the problem must be in DelftShip (maybe because I use the free version?), since Michlet works fine.

Thanks a lot by the way for Michlet, Leo, since I am studying naval architecture you can be sure that I appreciate it. I read the manual and documentation – is there maybe some description how Michlet calculates the resistance? I’m just asking out of curiosity and to be able to judge the results.

There is a description of similar numerical methods to what I use in
the 1st SWPE Report at:
http://www.cyberiad.net/library/pdf/tls99.pdf
I actually use higher order Filon transforms, but the above report
should give you the flavour of the methods.
Other algorithms are described in reports on my web page:
http://www.cyberiad.net/leo.htm

Good luck with your studies!
Leo.

[Vic Bauwens]

Hi all,

I have the same issue. Some models, of which I know for fact that they were exported before without any hitches, now consistently fail.
Symptoms exactly as described above, all zero’s except for the offsets… I kept on cursing myself, but it seems I’m not alone?

grtz vic

[Marven]

The problem has just been addressed, so with the next release (version 6.28.260) things should work again as expected. The release is scheduled for next week.

[Author]

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