Problems with TopOpt

Hi,

I am just running through the tutorials (1st simple beam set-up) and when trying to run the solver I get an error "1. Solution exception:Object reference not set to an instance of an object."

I double-checked the settings and it looks right to me.

What seems to be the problem?

Attachments:

Bridge-TopoOpt01.gh, 11 KB

Replies to This Discussion

Permalink Reply by Oded Amir on August 25, 2015 at 12:20pm

Hi,

Can you please send me the rhino file with the defined geometry, so that I can try reproduce the error and hopefully find its origin?

Thanks,

Oded

odedamir@cv.technion.ac.il

Permalink Reply by Richard Tsai on August 25, 2015 at 1:53pm

Hi Oded,

Here are the files.

Attachments:

Stress-Test03.3dm, 49 KB
Bridge-TopoOpt01.gh, 11 KB

Permalink Reply by Oded Amir on August 26, 2015 at 2:08pm

I think the design space in your example was very coarse and couldn't obtain a reasonable finite element discretization. I scaled it up and updated some of the settings - note that you need at least one of the supports to fix both x and y.

Also - it seems that the plugin version you are using is slightly different - at least visually some of the tags are different. It may be OK but I suggest to download the current version.

Attached are the updated files, I tested them and it seems to run smoothly. Let me know if any further problems are encountered.

Attachments:

BridgeTopoOpt01.gh, 11 KB
StressTest03.3dm, 46 KB

Permalink Reply by Richard Tsai on August 26, 2015 at 9:58pm

Hi Oded,

Ok seems like object needs to be scaled up to increase discretization resolution - also as you said need to constrain at least one of the supports for x and y.

I am using the latest version downloaded from Food4Rhino. Thanks a lot for the help.

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