Learning Forum

[vishal295]

Hello !

 

I am doing structural simulation of Transformer Tank (Shell Body).

After doing simulation in ANSYS Workbench, I have exported deformed tank geometry from ANSYS Mechanical Solution into ''.STL file'' and I have opened this stl file in ANSYS Space claim to create Surface (Skin Surface tool in Reverse Engineering) from deformed mesh geometry (stl file contains deformed mesh geomtery- which I want convert into step file to measure the deformed volume).

After creating surface from facets. I found dimension of tranformer geometry was changed. (i.e. original length was 1600mm and after Reverse Engineering tool- Skin surfacing - New Length was 49mm)

I checked my dimension units in ANSYS Mechanical and in Space Claim, both were in mm.

 

I don't know how but there must be some expoting problem from Solution ANSYS Mechanical stl file (I assume). IS IT ???????????

I am missing something but I don't know..... 

Can anyone help me with this ??

 

Thanks !

Regards,

Vishal

[peteroznewman]

When importing an STL into SpaceClaim, pay attention to the Units setting in the Import STL file dialog. The default is not mm for the import, even though SpaceClaim has mm as the default.

[vishal295]

Hi Peter,

 

Thanks for reply...

 

1) Importing STL file into SpaceClaim is opening the STL file in SpaceClaim - In my knowledge - if I am not wrong !!! Is it ??

2) I just opened the stl file directly into SpaceClaim.. Didn't import or did not do anything... I opened Space Claim and in open folder I just opened stl file and during this process there was no Unit setting I found. And meanwhile working with stl file in space claim - unit system was same. (in my case in mm)

3)  And in ANSYS Mechanical - unit system was in mm. And I used exporting procedure as attached in picture. (please see- image named capture_01). During exporting deformed stl file from ansys there was no unit system changing option I found (attached in capture_02)  

4) Am I right with this exporting and importing (opening file in SpaceClaim) procedure ?

[vishal295]

I am using this Unit option in ANSYS SpcaeClaim. Is there anything wrong with Unit System Option.

 

 

I am using also same unit option in ANSYS Mechanical.

[vishal295]

Yes. The default is mm while importing in SpaceClaim. But still it was scaled to 39.41 time smaller than original evertime.

Here I have attached screenshot of scale in ANSYS MEchanical (which is 1).

Is there any setting where I have to lookafter.?

I have played with also other variables but still I am not getting original dimension.

 

 

 

 

 

[peteroznewman]

In SpaceClaim, click on the Assembly tab, click on the File button (it has a + sign on it). Change the file type to STL.  Note that there is a pull down to STL units: and the default is Automatic.  Pull that down to specify the units.

[vishal295]

Hi Peter,

 

When I did this approach (In Assembly-> file + -> STL unit to mm ) ----> Dimension is still different 

But one strange thing I noted is that - when hide other parts (and shown just one part) and tried with STL unit in mm - Dimension in exported STEP file is still different than original 

but when I kept this STL unit in Automatic ---> Dimension in exported STEP file is same as original geometry

but when I kept this STL unit in AUtomatic --> (shown all parts in assembly then) ----> Dimension is different

 

 

[vishal295]

For my case :

 

I have 3 parts in my geometry.

Let's say side length of 1 part is 1500mm in STEP cad file. This is original lentgh 1500mm.

My Unit setting in ANSYS WB and ANSYS Mechanical is in mm.

When I export stl file from ANSYS Mechanical and I open it in SpaceClaim. I consider different Unit setting in Ansys SpaceClaim as follows and it shows me different length.

 

1) When I consider ''Automatic'' unit setting in SpaceClaim and I open my Aseembly geometry then side lentgh is around 40,11mm. (There is something dimensioning from inch to mm occured---I don't know how)

2) when I consider ''m'' unit seeting in SpaceClaim and open my geometry- Side length is 1500mm (like original)

3) when I consider ''mm'' unit seeting in SpaceClaim and open my geometry- Side length is 1,500mm

4) when I consider ''inch'' unit seeting in SpaceClaim and open my geometry- Side length is 40,11mm

 

So at the moment not to get confused, I am keeping my unit setting in ANSYS SpaceClaim ''m''.

 

I am using version 2020 R1.

 

In attachment - Unit setting