Volume elements are not created

SOFiSTiK
#1

I tried to use the code below to create volume elements

+PROG SofimshC
HEAD
SYST REST
SVO NO GRP MNO
1 31 11
SVOB NO (101 110)
SVO NO GRP MNO
2 32 12
SVOB NO (201 244)

SVO 1 has boundary surfaces from 101 to 110, the volume looks like this

image
image1688Ă—554 204 KB

SVO 2 has boundary surfaces from 201 to 244, the volume looks like this

image
image1841Ă—632 274 KB

When running it, it shows errors:

+++++ error no. 12115 ; input line: 9
0 Leading generations
+++++ error no. 12115 ; input line: 13
0 Leading generations

The result looks like that the volume elements are created:

image
image1579Ă—1252 290 KB

But the elements info show that they are quad elements.

image
image1304Ă—511 13.3 KB

image

#2

Hello

Have you tried to use the commands SVO and SVOB on a simple example?

I believe we have already discussed a similar problem. As the AQUA manual states, “for an unstructured meshing with tetrahedrons, the surfaces of the structural volume must form a closed shell.” (AQUA manual, page 5.39)In my opinion the command only handles fully closed volumes. It is therefore not possible to use openings in the area.

So in your case you need to split SVO 1 and 2 into several smaller volumes that do not contain any openings.

Best regards
Frederik Höller
Your SOFiSTiK Support Team

#3

I tried a simple block without any opening, but still doesn’t work
image

+++++ error no. 12115 ; input line: 9
0 Leading generations

Please replace “dat” with “zip”, because the forum doesn’t allow zip format.
Unzip to a folder and run 1.dat.
Sofistik Volume.dat (1.1 KB)

#4

Hello

Please understand that I cannot unpack a .zip file for security reasons in the future.
Please post your files directly into the forum. Thank you :wink:

That being said, have you seen the TEDDY example on the “SVO” and “SVOB” commands?

TEDDY > File > Examples > sofimshc > english > volume_modeling > tet_volume_2mat.dat

As far as I can gather from your files, you forgot to include the commands “STEU MESH 2” and “STEU MESH 3” in the second SOFiMSHC run.
To select multiple items from a list, you must also write SVOB NO (1 6 1). The last 1 indicates the increment.

Best regards
Frederik Höller
Your SOFiSTiK Support Team

1 Like
#5

A block with a hole is meshed by SofimshA UMSH and SofimshC SVO,
image

SofimshA UMSH works, while SofimshC SVO fails.