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**sb1966****Member**- Registered: 2015-03-16
- Posts: 178

Dear All,

It might be a trivial question to many of you. But I am sorry to say that after going through the relevant documentation, I could not really understand the following:

1) how do these two operators viz. CALC_CHAMP and CREA_CHAMP really differ?

2) which one of them should be preferred over the other and under what circumstance(s)?

It would be great help if any one of the respected members could elaborate on the same *preferably with some minimalistic example.*

Kindly note that the same question was asked in a slightly different context in

` ____://www.code-aster.org/forum2/viewtopic.php?id=24421`

but did not attract any reply.

Any help would be greatly appreciated.

Best regards.

Sukumar

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**SamuelTwain****Member**- Registered: 2020-08-14
- Posts: 18

Hi Sukumar,

Below is my understanding about CALC_CHAMP and CREA_CHAMP. But I also doubt whether I am right.

For CALC_CHAMP, this order is uesd to calculate some results such as reaction force, stress and strain for post-processing or another subsequent model. So CALC_CHAMP will lead to a result data structure.

For CREA_CHAMP, this order aims to create a field for model initialization or projection. It will lead to a field.

I'm very appreciated of anyone who can clarify clearer or share more.

Samuel

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**sb1966****Member**- Registered: 2015-03-16
- Posts: 178

Dear Samuel,

Thanks a lot for your explanation.

Then, if I have understood correctly, it can be put precisely as:

1) Use CALC_CHAMP to calculate data structure from an already existing data

2) Use CREA_CHAMP to intialize a new field, to be populated later by using analytical formulae or to calculate from already existing result.

Hope we can listen from someone who can further clarify the matter/correct me.

Best regards

Sukumar

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