non uniform distributed load

[Jee-Bee]

nice work!!

[HarryvL]

Awesome @UR_

I see many applications for this. A practical one in structural engineering would be hydrostatic pressure, where the user specifies the water surface and the direction of the gravity vector and FC calculates pressure on element faces from distance to water surface and water density. Analysis of storage tanks and dams come to mind.

Also very nice to see the macro, because it is a treasure trove of code snippets - from file IO to working out and assigning face loads.

[thschrader]

@UR_:
Played with your macro (beam 1000x30x50 mm S235
under triangle loading). After running ccx, all results
are zero. Maybe I do something wrong with the scaling?

testmacroUR.FCStd

(595.48 KiB) Downloaded 121 times

macro.JPG (39.21 KiB) Viewed 1578 times

triangle_loading.JPG (30.24 KiB) Viewed 1578 times

[UR_]

Maybe I do something wrong with the scaling?

Scaling looks perfect. BTW, it's just for visualization (scale length of green lines).
But your load function p(x)=x leads to a massive pressure of 1000 MPa at beam's tip. And this is very huge.

But main problem is:
ATM, this macro is designed for 2D-elements only.

I will try to upgrade this to work with 3D-elements too.

[thschrader]

But your load function p(x)=x leads to a massive pressure of 1000 MPa at beam's tip.

Aaah ok, 1 mm equals 1 MPa.
Does the macro load-function completely overwrites the FemConstraint pressure values
from the input dialog? Or is there a "connection" between them?
I will try to run the beam with 2D shell elements at the weekend.
Thanks for your work, 3D option is welcome.

constraint.JPG (49.12 KiB) Viewed 1555 times

[UR_]

Does the macro load-function completely overwrites the FemConstraint pressure values

It generated a new file with same name, therefore in your case "C:\TS\kann_weg\test\FEMMeshGmsh_Pressure.inp" is gone.

[thschrader]

It is possible to assign different faces with different load-functions.
Run macro with load function 1 at face 1, save pressure.inp.
Rerun macro with load function 2 on face 2, copy values from saved
pressure.inp into latest pressure.inp.

beam_loading.jpg (58.84 KiB) Viewed 1511 times

stress.JPG (36.03 KiB) Viewed 1511 times

[UR_]

... 3D option is welcome.

Now "ApplyNonUniformLoad.FCStd" is updated to work with S3, S6, C3D4 and C3D10

NonUniformLoad C3D10.gif (553.69 KiB) Viewed 1479 times

deflection.gif (691.39 KiB) Viewed 1479 times

example file:

bulge pressure load.FCStd

(824.5 KiB) Downloaded 127 times

updated macro:

ApplyNonUniformLoad.FCMacro

(7.75 KiB) Downloaded 111 times

[thschrader]

Now "ApplyNonUniformLoad.FCStd" is updated to work with S3, S6, C3D4 and C3D10

Hi UR_,
thanks for the new macro. Exactly what I need

momentum_loading.JPG (53.65 KiB) Viewed 1455 times

[thschrader]

Ok,
here is a calculation of a concrete tank (D=4m) half-filled with water.
Calculation runs fine, but writing the NonUniformLoad needed more than 30 min.
The GUI reacts slow. Is there a possibility to speed this up? Like the curvature
plot from the curves-wb (as an illustration).

watertank.JPG (88.46 KiB) Viewed 1437 times