How to obtain mass and stiffness matrices with Abaqus

[alain10025]

Hello,

i am working with Abaqus and I am trying to obtain the mass and stiffness matrices of my structure. I know the command to use in the .inp file but I have problems using the "ELSET" keyword ... Could someone help me ?
Thanks a lot

Alain

 

[bassmanjax]

hi Alain

If I read you right, you need to specify an elset name on the *ELEMENT MATRIX OUTPUT card. You can define the elset using the *ELSET card and put the elements you need into that. Check in the ABAQUS keywords reference - should tell you what you need to know.

Martin

 

[alain10025]

The problem is that actually I can't found what is "elset" linked with...
I can't find in the Abaqus help file where "eleset" needs to be specified.

 

[bassmanjax]

Alain

*ELSET is just a convenient way of grouping elemnts so that you can operate on them. It can be defined at either the part or instance level - have a look at *ELSET in the keyword reference. You should define a line like this;

*ELSET, ELSET=myelset
1,2,3,.....

Then, when you define the matrix output;

*ELEMENT MATRIX OUTPUT, ELSET=myelset

will output the matrices for the elements in myelset.

Martin

Martin

 

[alain10025]

Ok, thanks a lot !

Alain