New Lines Prediction Program

DCockey · Jan 9, 2013

Ad Hoc said: ↑

You may find these up your alley then:

"Application of a real-coded genetic algorithm for the fitting of a ship hull surface through a single non-uniform B-spline surface", Le T-H., Kim D-J.
JMST Vol 16, No.2 2011.
and
"Surface intersection in geometric modeling of ship hulls", Ventura M., Guedes Soares C.,
JMST, Vol 17, No.1 2012.
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Thanks for the suggestions.

John Letcher has promoted his "relational geometry" system as better at dealing with surface intersections. I'm curious to see what Ventura and Guedes discuss.

Mikko Brummer · Jan 10, 2013

fcfc said: ↑

Seems current trend:

See www.orc.org/minutes/ITC 2012.pdf , I a waiting for ORC VPP2013 documentation to be published to learn more.

Seems they no longer use delft series upright with a bunch of parameters. Only a dynamic waterline length, LVR (DLR the other way), and BTR (beam/dratft ratio). And they use heeled hull parameters, not uprigh hull parameters with heel correction.
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Thanks... looks promising. It would appear that the new VPP is also allowing for leeway as an independent variable, although the document is not very clear about it (or anything else ;-). Anyway, leeway needs to be recalculated during every iteration loop for good results. The effective lenght calculation will certainly be better than the old one.

Mikko Brummer · Jan 10, 2013

fcfc said: ↑

BTW, does anyone know how LSM (second moment length) are computed ?
There are some clues on page 21 chapter 4.2.2.4. http://www.orc.org/rules/ORC VPP Documentation 2012.pdf
What I am missing is where is zero x stem or stern, and what unit (meter, feet).
And how is LSM0 is computed. Is it a recursive computation, since depth correction for section does include LSM0 term ?

Thanks.
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Joakim could possibly comment on this?

Mikko Brummer · Jan 10, 2013

Remmlinger said: ↑

If the updated version of UliLines with more control over the topsides at the bow is of any help to you, I can try to speed up my work and release the update asap.
Uli
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Thank you Uli - the Dehler 33 bow now looks good!

Remmlinger · Feb 1, 2013

UliLines_4.2

There is a new version 4.2 with better fairing and more control.
The user's manual can be downloaded at
http://www.remmlinger.com/UliLines.html

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New Lines Prediction Program

DCockey Senior Member

Mikko Brummer Senior Member

Mikko Brummer Senior Member

Mikko Brummer Senior Member

Attached Files:

Dehler 33 DYNAnew.jpg

Remmlinger engineer

3D Mesh to Lines Plan

Merging 2 sets of lines in software

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Shell plates and hull lines.

Hull surface from a lines drawing of plan/profile with a few frames?

Tutorial: how to make a lines plan in Rhino from .pdf

creating Linesplan using Delftship (video)

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printing lines from PolyCad