Water tank with varaible walls thickness

[MUHANNAD.ABU_ABDO]

Hello to all .. i'm trying to simulate deep water tank with 27.5 m diameter & 25 m depth , but the thickness is changed every 5 meter start of 1.5 m at end to 0.3 m at top as in the pic below , i modeled the tank as solid using Revolve and i want to check if the shear stress is within allowable limits and walls thickness enough or not ! can someone help me with this issue ?

Thanks in advance

[Mohammed_Ata]

I think you have 2 options:

1- Draw each 5.00m vertical strip individually, then you have a thickness per each! 

2- You can use option (variable thickness along line) as shown, it presents linear variable thickness!

 

[MUHANNAD.ABU_ABDO]

i already made the model ! i didn't mean the thickness is variable along the wall ( Linear ) i meant as in the pic below 

[Mohammed_Ata]

I don't think so as RSA draws the area section from its geometric center! 

[MUHANNAD.ABU_ABDO]

Check the model file in the first post !

[Artur.Kosakowski]

Have you considered modelling the tank as a solid? 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[MUHANNAD.ABU_ABDO]

Yes i did .. check the model in the link below ..

https://www.mediafire.com/?9alhqepy44ogh58

Thanks in advance

[Artur.Kosakowski]

I'd say you need more elements for the precision of the solution e.g. increase number of divisions for revolving to 240 and have more elements across the wall thickness specially for the top part where you have only one row of solid  (mesh) elements. You may also consider using the axisymmetric structure model instead.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[MUHANNAD.ABU_ABDO]

thanks for your response .. i tried to do it using axisymmetric structure ! but i failed ! due to that i used volumteric structure design .. Could you give me small video or hint how i can do it using axisymmetric ,, your help is highly appreciated 

Thanks in advance

[Artur.Kosakowski · Accepted solution]

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[MUHANNAD.ABU_ABDO]

Many thanks .. this is useful .. is it possible  to make  revolve for this panel ?

[Artur.Kosakowski]

The whole point for this structure type is to work with such reduced size model as the behavior of the structure is identical at any point of the 'circle' but you can crate a panel like this and revolve it to create a solid model (in this case you should start with a solid model type). 

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[MUHANNAD.ABU_ABDO]

i can't find the nature of load !



thanks for your efforts .. i appreciate that

[Artur.Kosakowski]

Could you attach your model?

[MUHANNAD.ABU_ABDO]

Here is the model

[Artur.Kosakowski]

I can't see any issue:

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[MUHANNAD.ABU_ABDO]

i tried to put the loads but it didn't work

[Artur.Kosakowski]

What kinds of loads exactly? 

[MUHANNAD.ABU_ABDO]

Water pressure

[Artur.Kosakowski]

I believe I defined linearly varying load in the video I attached to my previous answer. Do you have any issue to define such load yourself?