Hull fairing

bhnautika, I do not quite understand what you mean but one thing you're right, when I say that "Rhino can not", I'm wrong. It is not really if AutoCAD or Rhino can do it but if the user, with either program, may or may not do. I don't know Rhino thoroughly and therefore should not have said that it can't be done.
I figure a way to get a correct curves for the chine is to create a smooth surface and then get the intersection curve between them.
I've done hundreds of nested steel parts for CNC cutting with AutoCAD. Nor, therefore, I understand the need to use SW for cnc files.
The examples in my post # 19 correspond to structures of boats that I have developed with AutoCAD. They are really built boats, not an exercise in rendering. The 3D models were made to provide data for the workshop but also calculate the weight and center of gravity of the whole assembly.

 

Hi, temo,

I'm surprised no one mentioned Delftship or Freeship (older, free version). Both have flattening abilities, and I believe both can import IGES (at least Delftship does).

Delftship also has auto-fairing routines, as well as visual indicators for manual fairing. Freeship only has manual fairing.

I use Delfship 4 and SolidWorks 2015 for my projects. SW 2015 has introduced curved panel flattening features, which is exactly what you need. I believe it does this job even better than Delftship 4.

But that software is expensive, so if you don't have non-standard ways of getting it (like student versions and so on. PM me on that), then I suggest Freeship.

Let me know if there is a problem.

 

There are, it seems, many softwares that can do it. I have no special interest in AutoCAD but as the OP has mentioned and seems to have experience with it, I tried to convince him not to switch to another application to make his boat.

 

Well, don't take my word for it, but as much as I tried AutoCAD, it seemed to me a very inefficient software for designing boats. When I moved to SolidWorks, it felt like it was 10 years ahead in that department, even though it is not meant for boats.

But that's just my two cents if OP knows exactly what kind of boat he wants, I'd recommend Freeship. Simple, free, quick to learn, provides almost every tool you could need except automation. Software like AutoCAD and Solidworks is good if you're working on an experimental design where you need to change basic parameters of the model (like hull dimensions and shape) and have everything auto-update without any manual labor.

 

OP has almost finished his boat in AutoCAD. He only needs minor tweaks.
I've done most of my projects with AutoCAD. I also use MaxSurf, but it is downright painful to create the models, imo. So I make them in AutoCAD and exported in igs format, to MaxSurf.
SW and AutoCAD, in my opinion, have a small problem: they are very expensive. AutoCAD costs more money than I charge for a preliminary project. Therefore, we must think well before choosing a software.
For the OP's boat, for that ship, not worth it, in my opinion, not even switch to free software because only learn to use the program will cost more time than to finish the boat.
It is clear that each of us is happy with the software is using. Therefore, it is difficult to obtain unanimity as to which is the best program. In any case, one should not generalize, one have to decide the program that best meets his specific needs.

 

True. Well, in the first post, OP asked for software that could do that specific task, so I suggested it. Maybe it's possible to make fairing and panel flattening in AutoCAD, I don't know.


Temo, you could send me your model when it's finished (after fairing), I would import it to my Solidworks 2015, flatten your panels, and send them back to you. That way you wouldn't need to buy anything. It doesn't seem like a lot of work anyway.

 

Tansl yes you can get a smooth edge from an intersection of two smooth surfaces or you can create smooth edges and get a smooth surface, its a matter of choice. But you still need to know when something is smooth on the computer screen. Just because you haven't seen something doesn't mean it has not been done. Done in rhino, cut parts and weights and centres.

 

bhnautika, great job in Rhino. I was pleasantly surprised.
With regard to any structural detail, that is not dependent on Rhino, we could talk too, but do not know if we would be boring with all this the OP.
Good work.

 

Tansl thanks, agreed

 

Hello

Thank you all for your comments and advice.

Yes it was my hope to find a program another than Autocad(AC) and Solidworks(SW) that could do the fairing for me, a more boat specific program.

I don't know any of the programs mentioned here, but I guess a design program for hard chine boats would be the best to do the job for the hull and then do the interior in AC or SW.

Regarding the lofting and outer skin creation in AC/SW what would the the preferred workflow be?

- draw the half with bulkheads at each station
- draw the splines from bulkhead to bulkhead at every hard-chine
- pick the splines for the surfaces and use the stem and transom bulkheads for guide-curves or visa versa?

I remember seeing a video online that say one have to create the splines first, then the bulkhead to get a dynamic drawing with movable relations(in SW), but that would be hard to do without having the points of the bulkhead to snap on? How do I get the right curve? https://www.youtube.com/watch?v=C18kB35vyvY

I have tried some times in SW to make the skin, but it fail at the transom do to the lines in the transom being used by the hull-side, any way around this problem?

Also when it comes to making the hull-panels, do you start with etch single panel when you lay out the surfaces of etch hard-chine, taking into account the size of the plywood sheets? This would be a major task I think.

I have attached a photo of my old 1:100 scale model that's been sitting at my loft fore some years now, not looking to good after some moves.

Terje

 

temo, I use my software "ARQN" to smooth the forms and to create 3D models. It is based on AutoCAD, ie, the drawings are done in AutoCAD and ARQN performs calculations of naval architecture. You can find it on my website and I am at your disposal for any questions.