What's the difference among different midsurface extration method?

Altair Forum User

Hi all,

In hypermesh, there are different methods to extrating midsurface, like skin offset, offset, offset+planes and offset+planes+sweeps. What's the difference among this methods and how to judge which method is proper for a given geometry? Is there any detail reference document about this? Thank you.

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Roy

Pranav Hari

Hi Roy Duan

 

skin offset: Generates a midsurface by duplicating and offsetting the inner skin surfaces and assigning them a constant thickness

offset:  Creates pieces of the middle surface by offsetting the model’s surface towards the middle. This is the traditional approach for midsurfacing in HyperMesh

offset+planes: uses a midsurface algorithm to identify the planes in the model where a piece of plane can be used as a middle surface

offset +planes+sweeps: It uses a midsurface algorithm to identify the places where a piece of plane or a piece of a sweep surface can be used as a middle surface. A middle surface is constructed at the remaining places in the model, for example the places where planar or sweep surface pieces cannot be used as a middle surface, by the same algorithm as in the offset option via the offset of the model’s sides

 

Check this detailed document about midsurface too for reference

 

https://certification.altairuniversity.com/pluginfile.php/17356/mod_resource/content/1/2.4 Generating a Midsurface_2017_updated.pdf

Altair Forum User

Altair Forum User said:

Hi Roy Duan

 

skin offset: Generates a midsurface by duplicating and offsetting the inner skin surfaces and assigning them a constant thickness

offset:  Creates pieces of the middle surface by offsetting the model’s surface towards the middle. This is the traditional approach for midsurfacing in HyperMesh

offset+planes: uses a midsurface algorithm to identify the planes in the model where a piece of plane can be used as a middle surface

offset +planes+sweeps: It uses a midsurface algorithm to identify the places where a piece of plane or a piece of a sweep surface can be used as a middle surface. A middle surface is constructed at the remaining places in the model, for example the places where planar or sweep surface pieces cannot be used as a middle surface, by the same algorithm as in the offset option via the offset of the model’s sides

 

Check this detailed document about midsurface too for reference

 

https://certification.altairuniversity.com/pluginfile.php/17356/mod_resource/content/1/2.4 Generating a Midsurface_2017_updated.pdf

Hi Pranav Hari,

Could you please sent me the document you mentioned by attachment? I cannot open the link you provided.

 

Roy

Pranav Hari

Hi Roy Duan

 

Please register to the learning and certification program of Altair university https://certification.altairuniversity.com/. You can get this document from there

 

Also refer to the learning library where we have many videos on mid-surface extraction https://altairuniversity.com/learning-library/

 

Thanks