supports for ships under construction

[ivan]

Good morning to all, is the first time placed in this section, so I ask vein for the terms I will use during the thread, starting from the title! !

with an office colleague wondered how they keep the ships lifted during their permaence in the construction basin, while they are assembled. I really didn't want to believe that a ship that weighs a few thousand tons, leaned on simple supports made of wood.

Taking a look at the internet I saw that reality is just the one on exposed. but at this point I ask you:

- the concrete base supports and the wooden top are mathematically "calculated"?

- their interspace, is dictated by the internal "centination" of the eyelashes, or are placed at a distance that also springs from a mathematical dimensioning?

- don't the carriers leave "a fingerprint" on the ship's hull?

- how are the eyelashes hanging on the supports?

Sorry again for the terms "barbars" used, but in the office we do something else.

Hi.


ivan

 

[Exatem]

Good morning to all, is the first time placed in this section, so I ask vein for the terms I will use during the thread, starting from the title! !
with an office colleague wondered how they keep the ships lifted during their permaence in the construction basin, while they are assembled. I really didn't want to believe that a ship that weighs a few thousand tons, leaned on simple supports made of wood.
Taking a look at the internet I saw that reality is just the one on exposed. but at this point I ask you:
- the concrete base supports and the wooden top are mathematically "calculated"?
- their interspace, is dictated by the internal "centination" of the eyelashes, or are placed at a distance that also springs from a mathematical dimensioning?
- don't the carriers leave "a fingerprint" on the ship's hull?
- how are the eyelashes hanging on the supports?
Sorry again for the terms "barbars" used, but in the office we do something else.
Hi.
ivan

Hi, ivan.
Every now and then a nice little question about me.
Actually, we talked about it in "surface and under the waves" when we discussed how a ship's entry and exit from a dry dock (you can find it here: http://www.cad3d.it/forum1/showpost.php?p=217152&postcount=648)
First of all the ships are not lifted during their stay in the basin, but rest on the notches that are previously prepared following the "plan of the notches", a design that is realized by the construction yard or, as in our case, by the technical office responsible for the placing of the unit in the basin. when the notches are placed following this scheme, the basin is flooded, the boat takes off and the ship is introduced that is aligned to the notches themselves. then rest the door and begin to empty the basin following the descent of the ship on the heels. the palombari in this phase are in the water and verify that everything goes according to the expected. when the ship begins to lean, the palombari place the wedges that compensate the gaps between heels and hull.
the heels are of wood (they were once made of holy wood, a very hard wood, able to put in crisis many cutting blades) on a steel castle whose maximum load is 100 ton to heel (in our case). the heels are placed in correspondence of the reinforced orders and the bulkheads. serrets, sea sockets, sonar sensors, etc.
After cleaning operations, the hull is painted with anti-rust and anti-rust products. logically the areas covered by heels are not treated. will be at the next step in the basin when the heels are placed in other areas.
now you can give water to the basin.
if you have other questions. . .

 

[Exatem]

some pictures. If I were in the office I would have dozens.

 

[numero1]

and bittoni :smile:
You talked about the under but not the side, otherwise the ship goes right and left.
It is true, however, that ivan seemed to be interested in + below.
Hi.

 

[sampom]

It's true, though, that ivan seemed to be interested...

.. and under construction "ex novo", with ship still non-existent in dry.

 

[Exatem]

and bittoni :smile:
You talked about the under but not the side, otherwise the ship goes right and left.
It is true, however, that ivan seemed to be interested in + below.
Hi.

What do you mean as bittons?
if they are the side spikes, they are almost never used, only for "round" caresses as can be those of some old ones (as in the case of the harps). Monday I can post some photos

.. and under construction "ex novo", with ship still non-existent in dry.

Well, it depends here.
today the modular construction prevails. the pieces prefabricated in the workshop and assemble in basin or on temporary "scali" that are often replaced by semovent trolleys. in this case then carry everything on a floating basin. In the first case the varo occurs by flooding the basin while in the second, by "cropping" of the floating basin.
I attach some pictures about the cauliur.
the poppiera part was built and launched with traditional system, then it was towed to the spice where it was united with the prora and then "re-varata" with flooding of the floating basin.

 

[riccardot5765]

Can you be interested in some pictures of the last fake firecracker of stabia? no there is the famine basin but the ships are still launched with the slide. . .

 

[sampom]

... today the modular construction prevails. . .

One thing about the genere?http://www.youtube.com/watch?v=swionkrv4mw&feature=results_video&playnext=1&list=pld3f8a31a98a40c11

 

[Exatem]

One thing about the genere?http://www.youtube.com/watch?v=swionkrv4mw&feature=results_video&playnext=1&list=pld3f8a31a98a40c11

Yeah.
in "above and below..." we talked about it on the occasion of the German sub-seaters type xxi and American Liberty.
If you happen, watch the documentary of the megastructure series, "the construction of the queen mary ii".
Hello, Marco.

 

[sampom]

Yeah.
in "above and below..." we talked about it on the occasion of the German sub-seaters type xxi and American Liberty.
If you happen, watch the documentary of the megastructure series, "the construction of the queen mary ii".
Hello, Marco.

In fact, I remembered.
already seen that on sky/discovery... On purpose I went to look for the videos:

About TV, last Sunday you watched the sinking of the laconia? If so how did the "reconstruction" sound? Although I know that the script works a little fancy on some character, the protagonist/narrator for example.

greetings
Mar

 

[ivan]

your responses hit the mark. Now to use a little more technical terms, I was referring precisely to the construction of an ex-novo ship, within a famine basin.

therefore more than to calculate "mathematically" the heels and bittons, we rely on the experience, but above all on the design of the heels.

I thought there were some suffrage calculations of the size of the supports. in this video, even you can see how the keel, is supported laterally by real "points", which are then cut into the phase of moving the ship.
http://www.youtube.com/watch?v=nt_nxdsqaak&feature=related

 

[Exatem]

In fact, I remembered.
already seen that on sky/discovery... On purpose I went to look for the videos:

About TV, last Sunday you watched the sinking of the laconia? If so how did the "reconstruction" sound? Although I know that the script works a little fancy on some character, the protagonist/narrator for example.

greetings
Mar

I didn't see it.
But in some details it was really accurate. thinks that the u-156 had some details that other more famous movies omit. For example, the periscope had the rocky ropes that never appear in the cinematographic reconstructions (I attach some images in this regard).
but that of the laconia is a very sad story that deserves to be told.
for this you convinced me to write a report that you can find here:http://www.cad3d.it/forum1/showthread.php?p=237729#post237729

 

[numero1]

What do you mean as bittons?
if they are the side spikes, they are almost never used, only for "round" caresses as can be those of some old ones (as in the case of the harps). Monday I can post some photos

I meant those, in wood generally.
Why did you always call them?
Hi.