analyze problem shell structure

Hello,

I`m using karamba for my shell structure. With the analyzis

the displacements are given, the princ. stress do not work, how can

i solve this problem? See the pictures

I get the messages:

Error: Solution exception: Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index

J. Koeken

Attachments:

4.png, 494 KB

Replies to This Discussion

Permalink Reply by Robert Vier on October 16, 2012 at 7:43am

Hello,

this does not happen for me. can you send me / post the definition it is happening in so i can have a look?

best

Robert

Permalink Reply by j koeken on October 16, 2012 at 7:45am

Hello Robert,

Thanks for replying,

Here is the ghs. file

Best

Jeroen

Attachments:

crema1.gh, 69 KB

Permalink Reply by Robert Vier on October 16, 2012 at 8:07am

Hey j,

apparently it's got something to do with your mesh topology.

I will look at it also when i have time, for now i tried it with a simple mesh within your definition and it works.

i will hand this to clemens, the main developer once we found out - so if you are faster please tell me what the reason was.

best

robert

Attachments:

crema1.gh, 73 KB

Permalink Reply by j koeken on October 16, 2012 at 8:14am

Hello Robert,

Yes it now works, but i really need the more complex mesh.

I`m going to look for it. But if you find it out, please let me know

Best

Jeroen

Permalink Reply by j koeken on October 17, 2012 at 11:52am

Hello Robert,

I`m now using the smooth mesh because the other mesh doesn`t work. If only got 2 problems

the length an width of my project are 35.6 m, now i`m looking to the displacement where it`s given a displacement of 9.322 cm in the middle of the shell structure. When i`m putting the hole construction in to a final elemement program (DIANA) the displacement is going to be 93.22 cm, this is a factor 10, i know the answer in DIANA is correct but ì can`t find out what is went wrong in grasshopper.

Another problem is the fact that i want to create hole`s in the shell, i want to let the amount of holes to increase when i`m entering the middle of the shell structure.

I attached the gh. file

Best

Jeroen

Attachments:

crema1.gh, 72 KB

Permalink Reply by Robert Vier on October 18, 2012 at 9:36am

first thing i see is that you have to plug "schaal 1" also into material component where it says "element id" as it was in the file i sent you ...

best robert

Permalink Reply by j koeken on October 18, 2012 at 11:35am

Thank you,

But unfortunately it still doesn`t work. Also the lines from the stress flow, press strain and

isolines are only working on the mesh i want to create. the smooth mesh is to complex and there

are to many lines, so you can`t read the isolines. So i really need to create a own mesh, with is

less complex then the smooth mess.

best

Jeroen

Permalink Reply by Robert Vier on October 21, 2012 at 7:08am

isolines, force flow lines and principal stress lines all work similiar, and like described in the manual: they are traced from starting points on the mesh. to determine these starting points you supply lines that then are intersected with the mesh, so it is ensured the points really lie on the mesh.

if you want to have less isolines for better readability, simply decrease the number of lines you feed into the component.

so, is your problem the level of smoothness that you cannot achieve? i did not really get what you want to do / what your exact problem is.

best

Permalink Reply by j koeken on October 22, 2012 at 12:11am

Hello,

Yes the the problem still is the smooth of the mesh. It is now to smooth, i want to create a own mesh. but that isn`t working.

best

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