topic Re: INCOHERENT MESH ON EDGES in Robot Structural Analysis Forum

INCOHERENT MESH ON EDGES

Anonymous — Thu, 04 Jan 2018 06:27:20 GMT

Hi,

i set recommended meshing options according to autodesk wibbinar, but i still get error of INCOHERENT MESH ON EDGES

screencast:

http://autode.sk/2lRhu2w

*attached file.

Re: INCOHERENT MESH ON EDGES

Romanich — Thu, 04 Jan 2018 07:09:42 GMT

Hi @Anonymous,

Was the model exported from Revit?

Please check the second post on this topic:

https://forums.autodesk.com/t5/robot-structural-analysis-forum/robot-stops-responding/td-p/7661776

Re: INCOHERENT MESH ON EDGES

Anonymous — Thu, 04 Jan 2018 13:13:39 GMT

yes the model sent from revit to robot.

how to fix it in robot?

Re: INCOHERENT MESH ON EDGES

Rafacascudo — Fri, 05 Jan 2018 11:39:46 GMT

Hi @Anonymous ,

I had a look at your model and all problems are due to small geometrical imprecisions . Always be aware when there are large concentration of nodes very close to each other.

Also many FE acute triangles like below

When you look closer you can spot the imprecision

And those above are not causing incoherent mesh error.

Also , I always prefer to mesh large models in stages. After correcting the model Try meshing the slabs 1st , freeze the mesh and then mesh the walls and freeze the mesh.

Always freeze the mesh if it seems OK!!.

Always use at least 4 or 5 decimals for coordinates/dimensions(job preferences/units) . Many times you can only check differences with 8,9 decimals!!

Re: INCOHERENT MESH ON EDGES

Rafal.Gaweda — Fri, 05 Jan 2018 14:06:36 GMT

Hi @Anonymous

The way to correct inaccurate model coming from Revit:

Corrected model attached.

Re: INCOHERENT MESH ON EDGES

Rafacascudo — Fri, 05 Jan 2018 16:22:50 GMT

Hi @Rafal.Gaweda

How would you correct it in Revit??

Level by level or can it be done in a single step as in detailed correct?

Re: INCOHERENT MESH ON EDGES

Rafal.Gaweda — Fri, 05 Jan 2018 16:37:28 GMT

Hi @Rafacascudo

In Revit, there should be grid lines defined in correct analytical wall planes and then

or walls should be correctly created from scratch

See also video on slide 32 in webinar 10