I am willing to visualize my wave modeling on abaqus where i used the AQUA modulus. i ve got the code its
*SURFACE SECTION, ELSET=aquan, AQUAVISUALIZATION=YES
ive got a problem in the elset element. it keeps giving me errors
the last error is a normal defining problem.
tried many meshes but doesnt help
if you have already used this keyword on ABAQUS it would be helpful to give me few tips.
Thanks!!
Hello,
Can you provide a sketch for the submerged model you are studying? and for the mesh model.
If you you can also highlight elements set and report the exact Error of Abaqus.
Hey Ahmad this is what i am modelind. a riser (yellow). i modeled the free surface with a plane whome i gave a surface section (on property) .
*SURFACE SECTION, ELSET=Set-3, AQUAVISUALIZATION=YES
here is my code
and the error i get is this
Error in job plaqviz: Normal cannot be computed in 2500 elements. The nodal coordinates may be incorrect or the element aspect ratio may exceed 1000 to 1. The elements have been identified in element set ErrElemNormal.
the 2500 elements are the elements i gave to the surface.
Thank you !
Dear Larbi,
what type of Elements you have defined for the "free surface"? Are they rigid elements? if so, a buoyancy load will be applied on the "free surface" where the positive direction of the rigid elements normal must be pointed into the fluid.
For the free surface i ve assigned SF3D elements as it is specified in ABAQUS documentation. (otherwise you get an error saying to define this kind of elements)
in this same documentation it is said that the free surface is only for the post process and it's role it is just mapping the displacements. So no loads are applied.
Could you send me the link where or in which section is stated that: The free surface is only for the post process...? And What kind of Elements are used for the riser?
http://dsk.ippt.pan.pl/docs/abaqus/v6.13/books/usb/default.htm?startat=pt03ch06s11.html
look at : Visualization of gravity waves
and for a first modelisation i chose beam elements
and a second modeling i chose shell elements
Yes you are right. This feature is not stated in the old version of Abaqus 6.12.
However, to visualise the gravitational waves with Surface Elements using the option *SURFACE SECTION, it must be followed by another option *REBAR LAYER [1] which defines the orientation for the surface elements.
Now it should work.
[1] http://dsk.ippt.pan.pl/docs/abaqus/v6.13/books/key/default.htm?startat=ch18abk54.html#usb-kws-msurfacesection
in the rebar layer a material should be defined for the free surface. i don't see how to define a fluid material in material property...
it is a bit confusing
The rebar layer is apparently not supported when using aquavisualization. (lol)
This is really confusing
I think a Sub Option from the *REBAR LAYER is not allowed, not the *REBAR LAYER option. read the next line on your Error Message.
It helps if you share the *REBAR LAYER parameters which you have defined and caused this error.
i defined it from the tool (property -> section->surface)
but i guess i found the cause.
i deleted the rebar layer, and changed my elements to quadratique surface elements with reduced integration. And the error disapeared and my calculation was done.
im just trying to do it properly and i will send u my results and also the codes if you want.
i will also make a video for this issue and publish it on youtube. i guess im not the only one who has this issue.
Thanks for your answers Ahmad :D
sir, please help me create the graviy waves. i didnt understanding how to visualize these waves
Sir, I'd like to use quadratique surface elements to deal with the modeling of visualized gravity wave, but my main study object is a floating structure on the sea surface. If I modeled wave on the sea. I guessed that would cause Coincidence and crossover with the structure surface. So how to deal with that?
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