Catamaran design

Hello. Next year, I have to present my bachelor's thesis, which is my final graduation project, and I want to model two types of ship hulls in a 3D program: one classic and one catamaran. After that, I plan to import them into Ansys to analyze their performance. Can you help me with some plans for a catamaran?

 

Welcome to the Forum.

I guess that depends on what kind of "help" you're looking for and for what kind of catamaran.

 

Hello! A small one, 10-15 m i think, some plans to help me design it in rhino 3d, I don t know, maybe a table of offsets or some photos

 

I think the question was whether your project is to design a boat from scratch (apparently not) or whether you want to take an existing design and model its performance (I think that is it). What kind of catamaran would begin with whether it is a sailing boat or power boat. What are the performance parameters you are interested in? Speed as a function of power? Cost per ton and mile of transporting some payload as a function of speed? Motion in a seaway?

Anyway, I suggest you look through the Multihull Structure Thoughts https://www.boatdesign.net/threads/multihull-structure-thoughts.62361/ thread. There is an index on page 1 of the thread, and posts occasionally contain pictures of the lines. You have a good chance of finding something suitable in there.

 

I think you may have chosen an overcomplicated subject for your thesis. This would be more adequate for a PhD dissertation. There are too many variables. I suggest that you find a topic of interest and narrow the claims to two. In general, a thesis will start with a general description of the field of study and a short background for context. Then you narrow the field by selecting a particular aspect or example within that field of study and context. Third, you include one or two claims of what you will focus on and what your hypothesis is. This paragraph may include a general explanation of the method of investigation you will be using. finally, there should be some goal to the whole process. As a conclusion it is usually proper to add "next steps" or "future research". This shows that you recognize the study does not cover every aspect or possiblity and offers options on how to follow up.
If you want a catamaran and a "clasic" hull, just the general comparison can take a whole dissertation. Further, you would have to justify why you are comparing those two designs and what the goal is. Once you get that done, you will have to figure out what 3D program to use, learn how to, and justify how it models different designs accurately. If you are familiar with Ansys, then you would have to also show how it is appropriate to model and test two very different hull designs. Keep in mind that a set of lines is only a representation of the design. You will need to calculate weights, structural strength, power required, target speed ( and if it the same for both), sea condition (ditto), etc. Further, from your question, it appears you may not have a lot of knowledge of ships.
I advise you to choose from a subject you are familiar with. Maybe I am wrong and this is for a Naval Architect or Engineer degree. However, a narrow thesis that

 

Thank you for your reply! Yes, it s for my engineer degree and I know it s a little bit too complicated for what I know bcs I only did one semestre of Autocad and my knowleage is not that high but I wanted to try something different and not easy, I made a small boat hull in Rhino and it turned out very nice but now i find it difficult to put it in ansys and i don t really know what to do now. Thank you so much again for suggestions and reply!

 

I am with gonzo on his advice. I'm not clear on whether you're designing power or sail hulls, it seems that your goal could be to design a powerboat vee hull and a catamaran (tunnel) hull to compare performance. Designing a workable power boat is a pretty big task, so designing 2 boats is quite a project. Then completing sufficient analysis so that you can effectively compare performance is another complex undertaking. i wonder if considering a specific aspect of hull design would be more effective and meaninful to focus on?

 

Hello! I think that is a great idea, to project a hull and then to change an aspect and then compare both?

 

What is your degree on?

 

Naval Electromechanical Engineering

 

If you choose a subject within your field, the basic information was already covered in your courses. For example, you could address the efficiency differences between a diesel/electric vs a battery bank charge onshore. It should address several operational conditions; speed, sea conditions, etc.

 

Do you know where I could find informations about it?

 

Did you not take any courses on electromechanical systems? You can use equations like:

 

I think there must be some mistake there :

 

Can you point out a mistake?