import ABEC gmesh

[muskokajoe]

Hi, I'm hoping I can get some very basic hints on how to get from a SolidWorks part to a mesh file that ABEC will import.

I may be messing up the script, but I've got to the point where the script will import the example mesh, but not the one I make. I started with the "Speaker Cabinet SP38 Mesh-Files" example. I've tried .iges and .step files. Both meshes are registered, and I can simply switch the alias name in the script, but only the example appears in the drawing tab. What am I doing wrong? I could have manually put in nodes by now, but would really like to know....!

Many thanks in advance....

 

[DonVK]

Have a look at ABEC experts - help! .

 

[muskokajoe]

Have a look at ABEC experts - help! .

Thanks DonVK - I saw that before, and made an extra effort to go through it specifically, but still missing something. I've hacked the solving.txt script down to basically nothing but:

Control_Solver
f1=20; f2=500; NumFrequencies=30; Abscissa=log;
MeshFrequency=500Hz
Meshing=Bifu
// Sym=x;
Dim=3D

// MeshFileAlias=M is an alias to a mesh-file which is exported by GMESH.
// Since all dimensions are in mm we use Scale=1mm.

MeshFile_Properties
MeshFileAlias=M
Scale=1mm

// Helper element, which we use initially in order to identify Tags

Elements "Check"
SubDomain=1
MeshFileAlias=M
101 Mesh Include All

so it just shows the mesh, nodes, etc. The part I'm using is basically a shoebox without a top, i.e. 4 sides and a bottom, all about 10mm thick - I'm of the opinion that I am messing up the Solidworks export. I am doing:
- 'save as' and saving as a "STEP AP203" format .STEP file.
- gmesh takes it through the process mentioned no problem, but ABEC still can't see it....? (although it still sees the sample .msh file fine...)

I've tried various Aliases, etc. I've removed observation scripts. Tried different mesh settings in the script (DeLaunay). Any other ideas? Feeling pretty stupid right now. 😕😡🙁

Thanks.

 

[DonVK]

Can you attach a zipped copy of step file ? I can have a look at it.

I'm assuming you also registered the msh file in the ABEC project file.

 

[muskokajoe]

Much appreciated.

See attached. I did register the file. I've been registering and unregistering various mesh files to test the imports (or lack thereof).

 

[DonVK]

Nothing wrong with the step file, it meshes fine. It's open on one side.

I'll post a simple ABEC framework for later tonight and we can go through step by step to find where the problem is.

P.S. ABEC is a fantastic tool but the learning curve is a humbling experience for everyone 🙂

 

[DonVK]

OK I spoke too soon, it was quick to mesh it and create a file. I modified your solve script.

Another thought, ABEC supports mesh v3 format only. If you are using Gmsh v4 you need to export in v3 format.

 

[muskokajoe]

Yay!!

Got it - Thanks DonVK!!! 🙂🙂

The last detail was to export it as a Version 2 ASCII .msh file. Phew!

I think that's almost enough torment for this week - looking forward to crawling again on Monday. Hoping to get a basic box working and then maybe get a tweeter horn up to speed!? Hope I didn't just jinx myself. 😉

P.S. ABEC is a fantastic tool but the learning curve is a humbling experience for everyone 🙂

I am a fan of akabak, with the same caveats, although that didn't prepare me for ABEC.

thanks again - have a good weekend!

 

[DonVK]

No problem, and it's good to hear you're moving forward. If you like Akabak you'll also like LEM scripts in ABEC.