SWATH resistance predictions using Michlet

[Leo Lazauskas]

Now why does that last sentence sound familiar?

lol

We should know what to do by now. If you need information from Ad Hoc,
just write an SOR for pulling teeth from a lion

 

[Ad Hoc]

We should know what to do by now. If you need information from Ad Hoc,
just write an SOR for pulling teeth from a lion

Better be clear which tooth, lion's can be tricky buggers

 

[Ad Hoc]

The attached thesis might be helpful for trying to find appropriate form factors for SWATH and SLICE.

Finally got around to read this one.

Hmmm...did he pass??..not very good at all. Way way too many assumptions, just to get some "numbers". The SLICE hull configuration he uses is nothing like the actual SLICE.

Nowhere does he show units...terrible. Defeitions are hard to find.

Does not show any actual data of an actual hull form, just numbers from geometry. So ok, lets see what those numbers mean. His displacement length ratio is all to cock....the numbers are meaningless. Since if i use the actual SLICE values with his D/L ratio, the actual length of Lider, shown in previous post would be 8m long!!!

Only 9 references too. I had some 150 ref's and 300 bibliography for my Masters thesis.

 

[Leo Lazauskas]

Finally got around to read this one.

Hmmm...did he pass??..not very good at all. Way way too many assumptions, just to get some "numbers". The SLICE hull configuration he uses is nothing like the actual SLICE.

Nowhere does he show units...terrible. Defeitions are hard to find.

Does not show any actual data of an actual hull form, just numbers from geometry. So ok, lets see what those numbers mean. His displacement length ratio is all to cock....the numbers are meaningless. Since if i use the actual SLICE values with his D/L ratio, the actual length of Lider, shown in previous post would be 8m long!!!

Only 9 references too. I had some 150 ref's and 300 bibliography for my Masters thesis.

No idea if it passed or not. I just find them, John. It's up to you "academics" to mark them.

 

[zeroname]

i have a swath model from rhino... which format michlet can read? iges ?

 

[DCockey]

i have a swath model from rhino... which format michlet can read? iges ?

The Michlet manual describes the input file and the several ways geometry can be entered. Special formats are used.

Michlet can be downloaded using this page: http://www.cyberiad.net/michlet.htm

 

[jarocho87]

There are 2 in Mexico, Tenez and Lider are their names.

View attachment 68453



You mean have 5 strut/pods?

Lider and Tenaz are in Mexico, but they are not in service, they never did, I can't tell you why, but never came into service

 

[Ad Hoc]

Lider and Tenaz are in Mexico, but they are not in service, they never did, I can't tell you why, but never came into service

I know why, but I'm not sure that I can say publicly, for legal reasons.

 

[jarocho87]

I know why, but I'm not sure that I can say publicly, for legal reasons.

I know why also, and I know for sure that I can´t say it publicly, hahahahahahaha also legal reasons

Regards

 

[hongbohou]

The attached short report presents comparisons of Michlet predictions
of the total resistance with measured values of a small model SWATH.

Reasonable agreement is shown, provided that a form factor is applied
to the bulb, but not the strut (which is very thin and can be considered
as a flat plate). It is very likely that CFD could give even better
results, but execution times will be much longer.

This short example illustrates how some naval architects use their
experience in applying form factors to separate parts of the demihull,
rather than blindly applying them to the submerged body as a whole.

Hi~ I'm a student of naval architecture in newcastle university, my dissertation is improving SWATH vessel with rhino + maxsurf. But i don't have any dimensions of a SWATH. Can you help me if you have any plan or model.
best regards!

 

[jehardiman]

Hi~ I'm a student of naval architecture in newcastle university, my dissertation is improving SWATH vessel with rhino + maxsurf. But i don't have any dimensions of a SWATH. Can you help me if you have any plan or model.
best regards!

Try this thread.
Published data for SWATHS https://www.boatdesign.net/threads/published-data-for-swaths.36420/#post-437857

 

[hongbohou]

Try this thread.
Published data for SWATHS https://www.boatdesign.net/threads/published-data-for-swaths.36420/#post-437857

thank you very much~!

 

[hongbohou]

i have a swath model from rhino... which format michlet can read? iges ?

Hi~I'm a student of naval architecture in newcastle university, my dissertation is improving SWATH vessel with rhino + maxsurf. But i don't have any dimensions about a SWATH using as an original one,and my tutor don't have too. Can you help me if you still have the SWATH model ?
best regards!

 

[Ad Hoc]

... my dissertation is improving SWATH vessel with rhino + maxsurf...

Good luck with your dissertation.

What do you mean by...."improving".....can you define this please.

 

[hongbohou]

Good luck with your dissertation.

What do you mean by...."improving".....can you define this please.

Thank you~my dissertation is to reduce the resistance of SWATH, by two ways, the first one is lifting the thin connection haunch structure out of water using 4 pillars when the ship is operating in proper sea condition,so the waterplane area and the wet surface will reduce.the second one is just optimize the shape of the cylindrical pontoon.Of course i'm just doing my master's degree, So it won't be so complex ~~