topic Betreff: Ships Hull in Inventor Forum

Ships Hull

Anonymous — Fri, 23 Aug 2019 15:26:33 GMT

Hi all,

I have access to frame drawings for a 90m ship. I am trying to draw the ships hull in Inventor. I was hoping to redraw each frame and then use the loft command to connect each individual frame together.

Can anyone advise if this is correct, or is there a way I could transfer each individual frame outline into inventor and save me drawing each one.

Anyone with advice or suggestions will be appreciated.

Niall

Re: Ships Hull

JDMather — Fri, 23 Aug 2019 19:25:31 GMT

@Anonymous wrote:

1. I have access to frame drawings for a 90m ship.

2. I am trying to draw the ships hull in Inventor.

3. ...or is there a way I could transfer each individual frame outline into inventor and save me drawing each one.

1. What format is this information? Paper? DWG file? Other?

2. Attach Inventor file(s) of your attempt here.

3. What format (See #1)?

This does not sound like a beginner endeavor.

Are you a student? How much training and experience do you have with Inventor?

Re: Ships Hull

Anonymous — Sun, 25 Aug 2019 19:49:36 GMT

Hi JDMather,

I have attached a pdf drawing showing the details of some of the type of frames for the outline of the ships hull.

What I was hoping to achieve through Inventor was to know if it was possible to transfer each individual from from the stern to the bow approximately 122 frames and then use the loft command to connect each frame shape to form the hull framework. Is this possible as an AutoCad file.

Or can I have to draw each individual frame as apart drawing and then create an assembly before using the loft option.

Maybe you could suggest or advise if this is a choice or demonstrate another alternative.

Niall

Re: Ships Hull

JDMather — Sun, 25 Aug 2019 22:24:08 GMT

I would do this as multi-body solids and then push out the assembly, but I have been using Inventor for 17 yrs.

I would expect to complete a couple of years worth of projects of increasing complexity leading up to a project of this complexity - not exactly an endeavor for a beginner in Inventor.

Re: Ships Hull

Anonymous — Wed, 06 Nov 2019 11:00:06 GMT

Hi JDMather,

Re: Youtube.com/watch?v=PaPHNXy59Nc

I was thinking of the procedure as shown in the above video for your reference, I have used the loft command during my experience with various detailed constructions.

I was considering following a similar technique as used here, by re-drawing each frame form as a solid shape through continuous work planes and connecting each together as I progressed, starting at the back (stern) frame shape and moving along, drawing each separate frame towards the front(bow) on a new work plane in the aim of creating and connecting all the frames until the full length of the ship's hull feature. I know its a slow and long procedure but I think it may work.

Any views on this approach!

Do you think this option would work as a way of creating a reasonable hull shape? Or is there a way to cut and paste each individual frame shape into Inventor and then join them in sequence using the loft command, or any other command.

I am trying to produce this solid hull form which I can then use as a base to draw the top structure and re-create a 3D replica model of the ship.

Again your advice and suggestions are appreciated.

Niall

Re: Ships Hull

JDMather — Mon, 26 Aug 2019 11:39:38 GMT

@Anonymous wrote:

...starting at the back (stern) frame shape...

Create first sketch and then Attach your *.ipt file here for comment.

Re: Ships Hull

Anonymous — Tue, 05 Nov 2019 21:07:59 GMT

As a naval architect, I do not turn to Inventor to create the shape of a vessel's hull (except, perhaps, in the case of a simple box-like barge form). When I want to do what you are attempting, I import the frame shapes from your pdf in to a surface modeling program. Each frame is positioned at the correct location along the length of the vessel. Next you stretch a C-spline surface over them and there you are. I employ MultiSurf for this task; there are others to choose from also. The resulting surface model of the hull form can then be imported as an iges file in to Inventor. Proceed in IV to build the superstructure above the sheer line (deck edge line).

Edmund Glowacki, P.E.

Naval Architect

GLOWACKI ENGINEERING

1835 East West Parkway, Suite 10

Fleming Island, Florida 32003 USA

glowackiengineering.com

(904) 278-8870 ph

(904) 923-4242 c

(904) 278-8826 fx

ed@glowackiengineering.com

Re: Ships Hull

Anonymous — Wed, 06 Nov 2019 09:37:11 GMT

Hi Edmund,

Thanking you for the very interesting information and insight into this process. I was hoping you may have some links or references of any tutorials or youtube videos showing this task being used, or links to something similar.

This would help me greatly, as I would like to attempt this procedure and create the shape of a vessel's hull.

Any further help or suggestions you can provide will be appreciated.

Regards

Niall

Re: Ships Hull

lena.talkhina — Wed, 06 Nov 2019 11:01:15 GMT

Hello @Anonymous !

Great to see you here on Inventor Forum.

Did you find a solution?
If yes, please click on the "Accept as Solution" button as then also other community users can easily find and benefit from the information.
If not please don't hesitate to give an update here in your topic so all members know what ́s the progression on your question is and what might be helpful to achieve what you ́re looking for. 🙂

Re: Ships Hull

Anonymous — Wed, 06 Nov 2019 12:13:55 GMT

Hi Lena,

According to Edmund Glowacki Naval Architect, P.E. reply to me recently he suggested you import the frame shapes from your pdf in to a surface modeling program. Each frame is positioned at the correct location along the length of the vessel. Next you stretch a C-spline surface over them and there you are. I employ MultiSurf for this task; there are others to choose from also. The resulting surface model of the hull form can then be imported as an iges file in to Inventor. Proceed in IV to build the superstructure above the sheer line (deck edge line).

I was hoping you could look at this procedure and advise or forward any links to similar tutorials or youtube clips that may demonstrate examples of this course of action being done.

Any help or links you can suggestion will be appreciated.

Regards,

Niall

Betreff: Ships Hull

S_May — Wed, 06 Nov 2019 13:02:24 GMT

Hi @Anonymous

hier ein Muster...

Betreff: Ships Hull

S_May — Wed, 06 Nov 2019 13:06:30 GMT

f5676336-9903-4d19-8dd2-4a6a1b673f88,640,620

Betreff: Ships Hull

Anonymous — Wed, 06 Nov 2019 16:03:12 GMT

Hi,

That video is fine for drawing a canoe using Inventor and shows the basic commands, but I was hoping that someone could show a link to an online video or tutorial demonstrating how to import ships hull frame shapes from pdf into a surface modeling program such as Multisurf. Each frame is positioned at the correct location along the length of the vessel in question and then you stretch a C-spline surface over them to create and exterior side.

The resulting surface model of the hull form can then be imported as an iges file in to Inventor. You should the be able to proceed in Inventor to build the superstructure above the sheer line (deck edge line).

Anyone who has links to tutorials or videos for the above methods will be appreciated.

Niall

Betreff: Ships Hull

S_May — Wed, 06 Nov 2019 18:50:00 GMT

https://knowledge.autodesk.com/de/community/screencast/f5676336-9903-4d19-8dd2-4a6a1b673f88

f5676336-9903-4d19-8dd2-4a6a1b673f88,640,620

Betreff: Ships Hull

Anonymous — Wed, 06 Nov 2019 19:29:57 GMT

Niall,

The process I simply described above requires familiarity with somewhat complex techniques to:

1. Convert a pdf of a ship frame in to a dxf that can be loaded in to Autocad (ACAD).

2. In ACAD each frame must be cleaned up. Typically, a lot of extraneous clutter must be removed from each frame, leaving only the outline of the frame's shape.

3. Each cleaned up frame is imported in to MultiSurf (MS) as a dxf entity. Each one may need to be rotated to get its orientation correct. Additionally each frame may need to be "scaled" to get it to its correct size.

4. Then each frame would be "shifted" to its correct longitudinal location along the vessel's length.

5. I use these imported frames as templates to draw new, more pleasing curves in MS that are as close in shape to each frame as I can get. I strive to make each new curve as "fair" (smooth) as possible, where the imported dxf curves are typically relatively crude and locally bumpy.

6. These new MS curves are then used as "master curves", as the basis for a C-spline surface which closely approximates the desired vessel hull.

Look up MS on the web and you may find some tutorial videos that show how to create curves, and how to utilize those curves to create surfaces.

Good luck,

- Ed

Edmund Glowacki, P.E.

Naval Architect

GLOWACKI ENGINEERING

1835 East West Parkway, Suite 10

Fleming Island, Florida 32003 USA

glowackiengineering.com

(904) 278-8870 ph

(904) 923-4242 c

(904) 278-8826 fx

ed@glowackiengineering.com

Betreff: Ships Hull

Anonymous — Thu, 07 Nov 2019 09:21:17 GMT

Thanking you EdGlowacki

Betreff: Ships Hull

Anonymous — Thu, 07 Nov 2019 09:34:42 GMT

You need AutoCAD 2017 or later mind! But yes, finally, it can be done without any questionable third party apps! AutoCAD can now convert a PDF to DWG and it seems to do it pretty nicely! This video will show you how to.

https://www.youtube.com/watch?v=AOVt9597kLg

Betreff: Ships Hull

S_May — Thu, 07 Nov 2019 10:25:31 GMT

Hi @Anonymous

they will not succeed in the inventor with the autocad sketches, everything will stay green
I'll show you a method about surface models

Betreff: Ships Hull

Anonymous — Thu, 07 Nov 2019 10:45:27 GMT

I appreciate your advice S_May.

Betreff: Ships Hull

S_May — Thu, 07 Nov 2019 10:50:25 GMT

Hi @Anonymous

Here is a pattern in the rush of the day…. 😁