Jesus Cruz

[Jesus Cruz]

That data for the weight of the layers is just taken for the Design Hydrostatics Report, not for the loadcases, in any case the lightship weight have many ther items, such has the internal structure (girders, longitudinals, frames), equipments etc.

From the design stand point you can take the weight of ships with similar characteristics (same length, beam and depth), that can be use as a “first appraoch” stand point.

You can substitute the data when you have a more accurate calculations of the ship’s weight and CG.

[Jesus Cruz]

LCB or Longitudinal Center of Bouyancy, depends on the hull forms and volume, got nothing or very little to do with the Lwl, for a given Lwl the LCB location would depende in the transversal areas distribution.

For Instance lets take a Crew boat of 30 mts in length, the LCB for the design draft will ussually fall around 12 meters from the after peak.

and for a tug boat of the same length (30 mts.) the LCB would fall around 15 mts. from the after peak even further some times.

Hope this helps

Best Regards:)

[Jesus Cruz]

Gracias Sergio, el problema es que solo tengo el archivo en GF, no cuento con un software que pueda leer el GF y convertirlo en archivo DXF, mi pregunta esta mas encaminada a si ya puedes traducir de un formato a otro, la logica indica que se deberia poder hacer de forma inversa tambien esto es:

Si puedo traducir de Delftship a GF, debo poner traducir de forma inversa tambien.

Gracias de todos modos

Jesus Cruz

[Jesus Cruz]

What i did, was start “playing” with the icons, like inserting points. inserting faces and edges, in a blank space, so i could undertand the way the software “thinks” and after a while i understood the basics of the system and start developing the hulls, is a way to start, getting familiar with the software and then jump into modelling hulls.

Good luck

[Jesus Cruz]

Well I’m not that Jesus, so no holes (in my feet at least), hahahahaha

Considering that this is a request topic, can you include the MODU’s stability criteria in the software, it would save me a lot of time, thanks

[Jesus Cruz]

In the download area there is a Model database and some of them are as small as you mentioned, you can check the free module with those models and check if it fits your “needs”, I normally work with bigger ships, and the software really fits my requirements.

So bottom line check the model database you may find your answer there.

Hope this helps

[Jesus Cruz]

:woohoo: This is by far the best topic in the site.

👿 😆

[Jesus Cruz]

Yes, you can manually input the data just go to the Project settings menu, in the tag “Main dimensions”, there is a c`hecked square “Default at 0.5*L”, if that square is checked it will automatically set the midship section at half the Lenght that you indicated in the box above indicated as “length”, if it is not checked you can manually indicate the location of the midship section by inserting the value directlly in the box indicated as “Midship location”

Regards

[Jesus Cruz]

The Hydrostatic report in it’s right top corner indicates which is the Midship section location.

Now Delft ship have two options for this either you can put a value defined by the user or indicate as the 1/2 of the design length

This can be done in the Project settings menu, there is a tag named Main Dimensions where you give the main dimensions as per project, the Length is ussually the length between perpendiculars at the maximum draft, however you can choose which length to use and the software will calculate the 0.5L as the Midship section or you can give a fix value and the software will consider it as the fix location of the Midship section.

Just keep in mind that all values will be refer to the origin X=0, Y=0, Z=0.

Hope this info helps.

Regards

[Jesus Cruz]

The forward contour line is the interseccion of the ships bow with each waterline, and is measured from the origin (in Delftship is the point X=0,) in some cases is the aft perpendicular, so measure longitudinally from X=0 to the interseccion of each of the waterlines with the ship’s bow.

The aft countor line is the inerseccion of the stern line with each waterline, pretty much same as forward but is refered to the stern of the ship.

Hope this info helps.

Regards

[Jesus Cruz]

You can send me the file fbm file), i will exported to IGES for you and send it back, that way you can see if it fits to your requierments,

My mail is cruzmayora@hotmail.com

[Jesus Cruz]

The Professional extension can export files in IGES

[Jesus Cruz]

You can add a patch or a face in that area, just click the four points while you are pressing the ctrl key, four points would apear higligted and then press the “create a new face icon”, a “face should appear in the “hole” not being a hole anymore, hehehehehe, after that just click to select the edges that you want to crease and that should fix your problem.

[Jesus Cruz]

Yes my language is spanish (Mexican)

Jesus

[Jesus Cruz]

Other option is model your gunwale has a box, very thin so it won’t affect your hidrostatics, there is a model in the models database where somebody did something like that the model name is Freeship demo 1 , check it and probably you will understand what i mean.

[Author]

Posts