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CAD import and meshing error

May 9, 2011, 7:57 am
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0
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Hi everyone,

I am trying to import a .sat file to COMSOL. Even though in the CAD-programme (Rhino) I am able to form a union, it fails in COMSOL. If I simplify my model, so that the union works, the meshing no longer works! Either, it fails to mesh a face of the structure or I get "internal error with code 900". Furthermore, the problem is that, if I get my complicated model, and make a union in Rhino, COMSOL fails to import the geometry all in all!

I have been rebuilding my CAD-model, so that all the surfaces and solids would be well-defined.

Therefore, I would like to ask for some help in importing .sat-files to COMSOL. Anyone has experience on it?

And, what could be the error in the meshing process?


Henna
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How does COMSOL create its mesh on imported CAD geometries?

December 20, 2012, 8:12 am
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0
0
Dear community,

I am trying to import geometrical models of the human body to build a virtual man in COMSOL based on the free BodyParts3D database. The database supplies every piece of a human body as a high resolution .obj file, which I convert to STL or IGES (works a lot better during import than STL) for import to COMSOL.

My question is now:
These imported IGES-structures are a mesh already (see Abbildung 1 in the attachment). Some elements are not of high quality but I am not intending to modify the millions of mesh cells in the source material (Abb. 2). What I do want to change/modify is how COMSOL handles these source meshes for its internal mesh calculation. Instead of filling the whole structure with mesh cells to approximate the original shape, it seems to sub-mesh the source mesh cells. This drastically increases the amount of mesh cells in my models (Abb. 3 and Abb. 6).

Is there any best-practice guide on how to import meshed CAD models without "sub-meshing" all source elements? See my sphere example in the attachment (Abb. 4-6). What am I doing wrong in the import workflow that the sphere gets meshed in such a strange way? If the workflow is not working for a simple sphere already, it is obvious that the whole body model is nearly useless.


Best regards,
Thomas

P.S.: Unfortunately I get a "file extension error" during upload (I already remove any non-alphabetical characters), so I had to upload my PDF attachment here:
gigamove.rz.rwth-aachen.de/download/id/GskCsSL4RnAW72
↧
↧

CAD import preparation for successful modeling

August 23, 2013, 3:50 am
$
0
0
In preparing CAD models for effective modeling, I have made the following I have found the following to be useful:
1) Importing to COMSOL as solids only
2) Ticking the three boxes for repair options in the CAD import window
3) Adjustment of the CAD import tolerance (although I welcome suggestions of science behind this adjustment - thus far I have found no general trend)
4) Use of the repair function selecting all parts of the CAD (incidentally, is there a way to automatically select all parts of the CAD?) and adjusting the tolerance of repair. Similarly to the import tolerance I welcome suggestion as to a procedure to appropriately choose the size.
5) Use of repair functions in Spaceclaim. Although I have not yet found a consistent approach which works reliably. And in some cases I find that Spaceclaim, by performing one repair operation causes other problems - similar to a dog chasing its tail.
6) Virtual operations in COMSOL - ignoring edges etc. I find can sometimes help, though again I have no reliable procedure.
7) The use of extreme variation in mesh size. With smallest mesh size set to similar to the import tolerance and a rate of growth of 50 or more, has facilitated apprently unmeshable geometries in some cases.

The essential question I have is really, does anyone have a consistent method incoproating Spaceclaim, Solidworks and COMSOL to reliably and efficiently generate successful meshes from complex CAD models which are classed as "okay" by Solidworks, yet are problematic to mesh?
↧

How does COMSOL create its mesh on imported CAD geometries?

December 20, 2012, 7:12 am
$
0
0
Dear community,

I am trying to import geometrical models of the human body to build a virtual man in COMSOL based on the free BodyParts3D database. The database supplies every piece of a human body as a high resolution .obj file, which I convert to STL or IGES (works a lot better during import than STL) for import to COMSOL.

My question is now:
These imported IGES-structures are a mesh already (see Abbildung 1 in the attachment). Some elements are not of high quality but I am not intending to modify the millions of mesh cells in the source material (Abb. 2). What I do want to change/modify is how COMSOL handles these source meshes for its internal mesh calculation. Instead of filling the whole structure with mesh cells to approximate the original shape, it seems to sub-mesh the source mesh cells. This drastically increases the amount of mesh cells in my models (Abb. 3 and Abb. 6).

Is there any best-practice guide on how to import meshed CAD models without "sub-meshing" all source elements? See my sphere example in the attachment (Abb. 4-6). What am I doing wrong in the import workflow that the sphere gets meshed in such a strange way? If the workflow is not working for a simple sphere already, it is obvious that the whole body model is nearly useless.


Best regards,
Thomas

P.S.: Unfortunately I get a "file extension error" during upload (I already remove any non-alphabetical characters), so I had to upload my PDF attachment here:
gigamove.rz.rwth-aachen.de/download/id/GskCsSL4RnAW72
↧

CAD IMPORT impossible

January 24, 2016, 8:21 am
$
0
0
I installed 5.0 COMSOL, I want to import a drawing from AutoCAD, but ihave a message " unable to obtain for the CAD Import Module '
↧
↧

CAD Import Module Error...

April 20, 2016, 9:35 am
$
0
0
Hi,

I have created a CAD model and tried to import it into COMSOL, but I was encountered with this error:

''Feature: Import 1
CAD Import Module functionality is not installed.
Note: CAD Import Module functionality is included in the Design Module and the LiveLink products for
CAD''.

Now, I am not sure if there is simply a feature (Add-in) that needs to be activated or added to my current version of COMSOL (5.2), or I should have installed a completely different COMSOL version which would have had the CAD Import Module feature, in the first place?

Your help will be really appreciated.
Alireza
↧

CAD import and meshing error

May 9, 2011, 1:57 pm
$
0
0
Hi everyone,

I am trying to import a .sat file to COMSOL. Even though in the CAD-programme (Rhino) I am able to form a union, it fails in COMSOL. If I simplify my model, so that the union works, the meshing no longer works! Either, it fails to mesh a face of the structure or I get "internal error with code 900". Furthermore, the problem is that, if I get my complicated model, and make a union in Rhino, COMSOL fails to import the geometry all in all!

I have been rebuilding my CAD-model, so that all the surfaces and solids would be well-defined.

Therefore, I would like to ask for some help in importing .sat-files to COMSOL. Anyone has experience on it?

And, what could be the error in the meshing process?


Henna
↧

How does COMSOL create its mesh on imported CAD geometries?

December 20, 2012, 1:12 pm
$
0
0
Dear community,

I am trying to import geometrical models of the human body to build a virtual man in COMSOL based on the free BodyParts3D database. The database supplies every piece of a human body as a high resolution .obj file, which I convert to STL or IGES (works a lot better during import than STL) for import to COMSOL.

My question is now:
These imported IGES-structures are a mesh already (see Abbildung 1 in the attachment). Some elements are not of high quality but I am not intending to modify the millions of mesh cells in the source material (Abb. 2). What I do want to change/modify is how COMSOL handles these source meshes for its internal mesh calculation. Instead of filling the whole structure with mesh cells to approximate the original shape, it seems to sub-mesh the source mesh cells. This drastically increases the amount of mesh cells in my models (Abb. 3 and Abb. 6).

Is there any best-practice guide on how to import meshed CAD models without "sub-meshing" all source elements? See my sphere example in the attachment (Abb. 4-6). What am I doing wrong in the import workflow that the sphere gets meshed in such a strange way? If the workflow is not working for a simple sphere already, it is obvious that the whole body model is nearly useless.


Best regards,
Thomas

P.S.: Unfortunately I get a "file extension error" during upload (I already remove any non-alphabetical characters), so I had to upload my PDF attachment here:
gigamove.rz.rwth-aachen.de/download/id/GskCsSL4RnAW72
↧
Search

CAD import preparation for successful modeling

August 23, 2013, 9:50 am
$
0
0
In preparing CAD models for effective modeling, I have made the following I have found the following to be useful:
1) Importing to COMSOL as solids only
2) Ticking the three boxes for repair options in the CAD import window
3) Adjustment of the CAD import tolerance (although I welcome suggestions of science behind this adjustment - thus far I have found no general trend)
4) Use of the repair function selecting all parts of the CAD (incidentally, is there a way to automatically select all parts of the CAD?) and adjusting the tolerance of repair. Similarly to the import tolerance I welcome suggestion as to a procedure to appropriately choose the size.
5) Use of repair functions in Spaceclaim. Although I have not yet found a consistent approach which works reliably. And in some cases I find that Spaceclaim, by performing one repair operation causes other problems - similar to a dog chasing its tail.
6) Virtual operations in COMSOL - ignoring edges etc. I find can sometimes help, though again I have no reliable procedure.
7) The use of extreme variation in mesh size. With smallest mesh size set to similar to the import tolerance and a rate of growth of 50 or more, has facilitated apprently unmeshable geometries in some cases.

The essential question I have is really, does anyone have a consistent method incoproating Spaceclaim, Solidworks and COMSOL to reliably and efficiently generate successful meshes from complex CAD models which are classed as "okay" by Solidworks, yet are problematic to mesh?
↧
↧

CAD IMPORT impossible

January 24, 2016, 2:21 pm
$
0
0
I installed 5.0 COMSOL, I want to import a drawing from AutoCAD, but ihave a message " unable to obtain for the CAD Import Module '
↧

CAD Import Module Error...

April 20, 2016, 3:35 pm
$
0
0
Hi,

I have created a CAD model and tried to import it into COMSOL, but I was encountered with this error:

''Feature: Import 1
CAD Import Module functionality is not installed.
Note: CAD Import Module functionality is included in the Design Module and the LiveLink products for
CAD''.

Now, I am not sure if there is simply a feature (Add-in) that needs to be activated or added to my current version of COMSOL (5.2), or I should have installed a completely different COMSOL version which would have had the CAD Import Module feature, in the first place?

Your help will be really appreciated.
Alireza
↧

Solidworks import via CAD Import Module

May 5, 2016, 5:41 am
$
0
0
Hi Folks,

It seems as though the CAD Import module cannot import Solidworks 2016 files, but LiveLink for SolidWorks can... is that a correct understanding?

I am just about to have my SolidWorks installation updated, but won't go for SolidWorks 2016 if the CAD Import Module does not support SolidWorks 2016 yet... (I do not have the LiveLink for SolidWorks module).

Could someone confirm the above?

Thanks in advance!

Mark

p.s. I have Comsol 5.2.0.220

p.p.s. The reason I ask is because there is ambiguity in the Product System Requirements, both the CAD Import module and the LiveLink for SolidWorks tables indicate support only up to SolidWorks 2015, yet the text in the LiveLink product page indicates support for SolidWorks 2016. Clarification greatly appreciated...
↧

CAD import and meshing error

May 9, 2011, 8:57 am
$
0
0
Hi everyone,

I am trying to import a .sat file to COMSOL. Even though in the CAD-programme (Rhino) I am able to form a union, it fails in COMSOL. If I simplify my model, so that the union works, the meshing no longer works! Either, it fails to mesh a face of the structure or I get "internal error with code 900". Furthermore, the problem is that, if I get my complicated model, and make a union in Rhino, COMSOL fails to import the geometry all in all!

I have been rebuilding my CAD-model, so that all the surfaces and solids would be well-defined.

Therefore, I would like to ask for some help in importing .sat-files to COMSOL. Anyone has experience on it?

And, what could be the error in the meshing process?


Henna
↧
↧

How does COMSOL create its mesh on imported CAD geometries?

December 20, 2012, 9:12 am
$
0
0
Dear community,

I am trying to import geometrical models of the human body to build a virtual man in COMSOL based on the free BodyParts3D database. The database supplies every piece of a human body as a high resolution .obj file, which I convert to STL or IGES (works a lot better during import than STL) for import to COMSOL.

My question is now:
These imported IGES-structures are a mesh already (see Abbildung 1 in the attachment). Some elements are not of high quality but I am not intending to modify the millions of mesh cells in the source material (Abb. 2). What I do want to change/modify is how COMSOL handles these source meshes for its internal mesh calculation. Instead of filling the whole structure with mesh cells to approximate the original shape, it seems to sub-mesh the source mesh cells. This drastically increases the amount of mesh cells in my models (Abb. 3 and Abb. 6).

Is there any best-practice guide on how to import meshed CAD models without "sub-meshing" all source elements? See my sphere example in the attachment (Abb. 4-6). What am I doing wrong in the import workflow that the sphere gets meshed in such a strange way? If the workflow is not working for a simple sphere already, it is obvious that the whole body model is nearly useless.


Best regards,
Thomas

P.S.: Unfortunately I get a "file extension error" during upload (I already remove any non-alphabetical characters), so I had to upload my PDF attachment here:
gigamove.rz.rwth-aachen.de/download/id/GskCsSL4RnAW72
↧

CAD import preparation for successful modeling

August 23, 2013, 4:50 am
$
0
0
In preparing CAD models for effective modeling, I have made the following I have found the following to be useful:
1) Importing to COMSOL as solids only
2) Ticking the three boxes for repair options in the CAD import window
3) Adjustment of the CAD import tolerance (although I welcome suggestions of science behind this adjustment - thus far I have found no general trend)
4) Use of the repair function selecting all parts of the CAD (incidentally, is there a way to automatically select all parts of the CAD?) and adjusting the tolerance of repair. Similarly to the import tolerance I welcome suggestion as to a procedure to appropriately choose the size.
5) Use of repair functions in Spaceclaim. Although I have not yet found a consistent approach which works reliably. And in some cases I find that Spaceclaim, by performing one repair operation causes other problems - similar to a dog chasing its tail.
6) Virtual operations in COMSOL - ignoring edges etc. I find can sometimes help, though again I have no reliable procedure.
7) The use of extreme variation in mesh size. With smallest mesh size set to similar to the import tolerance and a rate of growth of 50 or more, has facilitated apprently unmeshable geometries in some cases.

The essential question I have is really, does anyone have a consistent method incoproating Spaceclaim, Solidworks and COMSOL to reliably and efficiently generate successful meshes from complex CAD models which are classed as "okay" by Solidworks, yet are problematic to mesh?
↧
Search

CAD IMPORT impossible

January 24, 2016, 10:21 am
$
0
0
I installed 5.0 COMSOL, I want to import a drawing from AutoCAD, but ihave a message " unable to obtain for the CAD Import Module '
↧

CAD Import Module Error...

April 20, 2016, 10:35 am
$
0
0
Hi,

I have created a CAD model and tried to import it into COMSOL, but I was encountered with this error:

''Feature: Import 1
CAD Import Module functionality is not installed.
Note: CAD Import Module functionality is included in the Design Module and the LiveLink products for
CAD''.

Now, I am not sure if there is simply a feature (Add-in) that needs to be activated or added to my current version of COMSOL (5.2), or I should have installed a completely different COMSOL version which would have had the CAD Import Module feature, in the first place?

Your help will be really appreciated.
Alireza
↧
↧

Solidworks import via CAD Import Module

May 5, 2016, 12:41 am
$
0
0
Hi Folks,

It seems as though the CAD Import module cannot import Solidworks 2016 files, but LiveLink for SolidWorks can... is that a correct understanding?

I am just about to have my SolidWorks installation updated, but won't go for SolidWorks 2016 if the CAD Import Module does not support SolidWorks 2016 yet... (I do not have the LiveLink for SolidWorks module).

Could someone confirm the above?

Thanks in advance!

Mark

p.s. I have Comsol 5.2.0.220

p.p.s. The reason I ask is because there is ambiguity in the Product System Requirements, both the CAD Import module and the LiveLink for SolidWorks tables indicate support only up to SolidWorks 2015, yet the text in the LiveLink product page indicates support for SolidWorks 2016. Clarification greatly appreciated...
↧
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