hydro pressure

[Anonymous]

Hi, 

I need to apply a hydro pressure  from half to the top of a wall. 

How can i do this? 

I have already done this for the entire wall,and from the bottom to half height of a wall and this is OK, but I am really struggling if I want to the same from half to the top. Please can you help on this?

Thank  you very much.

Regards,

Viviana

[Artur.Kosakowski]

Hi Viviana,

I hope you find this topic helpful:

http://forums.autodesk.com/t5/robot-structural-analysis-forum/applying-hydrostatic-pressure-to-only-...

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.

[Anonymous]

Thank you very much for your reply. 

the link is very useful however I need to apply the pressure from half to the top of the wall, and the link does not discuss this specific case.

Please can you give me any ideas to sort this out? 

I would be very appreciate any advises.

Regards

Viv

[Artur.Kosakowski]

Indeed the applied geometrical limits are for limiting the pressure load to the left side of the wall rather than its upper part but the principle is exactly the same.

 

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.

[Anonymous]

thanks.. 

Do I need to divide the wall in two in order to apply the pressure ?

[Artur.Kosakowski]

No, you don't. The geometrical limits are intended for applying loads on indicated part of a bigger panel without the need to divide it into smaller ones. 

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.

[Anonymous]

Please can you confirm that the box height needs to be filled with the total height of the wall?

Thanks

[Artur.Kosakowski]

I'm not sure what you refer to as box height - do you mean liquid level h?

[Anonymous]

I have also another concern.. (apart from the fact that I am still not able to apply the pressure for half of the wall)

When apply the pressure on only one side of the wall (for the entire height) I am getting very high displacement in order of thousand metres, do you have an idea what the issue could be?

Once again thank you so much,

Viviana

[Anonymous]

yes  liquid level h 

🙂

[Artur.Kosakowski]

yes  liquid level h 

You should set it as the top level of the liquid in the global coordinate (Z axis) system. This may be e.g. 1 m below the top of the wall.

[Artur.Kosakowski]

When apply the pressure on only one side of the wall (for the entire height) I am getting very high displacement in order of thousand metres, do you have an idea what the issue could be?

1). The excessive total value of load e.g. when the real liquid level is much lower

2). Wrong value of liquid density

3). Ignored instability (e.g. due to lack of horizontal supports)

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[Anonymous]

liquid density = 1000 kg/m3

level of the water is equal to heigh of the wall

I have ignored an instability in direction UX

and i have also followed the following link 

http://forums.autodesk.com/t5/robot-structural-analysis-forum/instability-in-node-46-in-direction-ux...

but I did not solve the problem. 

any other suggestions?

thanks

[Artur.Kosakowski]

Judging by the values of displacements you got I don't think you should ignore the reported instability. 

You may want to watch the recording of the 16th Robot webinar available from:

http://forums.autodesk.com/t5/robot-structural-analysis-forum/robot-structural-analysis-webinars/td-...

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.

[Artur.Kosakowski]

Hi Viviana,

Have you manged to solve the instability issue in your model?