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Getting Wind Pressure value on buildings with complex surfaces

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Old   May 30, 2019, 02:43
Talking Getting Wind Pressure value on buildings with complex surfaces
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Vitor Leite
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Hi everyone,

I am working on a 2 story house and I am trying to get the wind pressure values of each external surface separately, according to each surface orientation. Because I simplified the model, removing all balconies and overhangs, seemed okay to use plot_surface objects or dumping object profile directly from phoenics to obtain the pressure values of each external surface separately (picture below).



https://imgur.com/a/PlrBxoU
If the model had overhangs, balconies or any complex geometries I believe utilizing plot_surface objects or dumping object profiles would not be advisable anymore.

My question is that: is there any way to separately obtain a surface variable values within Phoenics without dumping the whole blockage surface external surface?

I read some research papers that people could easily do it utilizing other programs plugins, such as Rhino, but I do not have access to any of these programs.

Thank you,

Vitor

Last edited by vitorleiteg; May 30, 2019 at 02:44. Reason: image not uploading
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Old   December 11, 2019, 11:02
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Harry
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Hi Vitor,

What you have done works well for a simple geometry like this, that is what I would suggest doing. For a more complex geometry this is more difficult and depends on what it is you are trying to achieve. Whether you want point/summed or averaged values for example.

Most importantly any objects you wish to pick up values for need to be resolved by the mesh. Balcony railings, for example, would need at least 1 cell per vertical rail to be resolved correctly.

You can output the forces in the X, Y and Z direction for the sum of all the facets of each object by going to “Menu > Output > Output of forces and moments on blockage objects”.

If you had a complex geometry imported from CAD for the balcony and overhang sections separately, you could get the force outputs from each of these objects in X, Y and Z.

Thanks,
Harry
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