I used the EXTSEOUT (ASMBULK EXTID = 15 DMIGPCH) to extract mass, stiffness and viscous damping matrices as pch file. The pch file contains KAAX and MAAX entries showing elements of stiffness and mass matrices, but there is no BAAX for damping.
I used the EXTSEOUT (ASMBULK EXTID = 15 DMIGPCH) to extract mass, stiffness and viscous damping matrices as pch file. The pch file contains KAAX and MAAX entries showing elements of stiffness and mass matrices, but there is no BAAX for damping.
OK- this has several issues... 1) Since you do not have a QSET defined, no modes are being solved... so you need to add a QSET and SPOINTS; 2) You didn't actually define any modal damping... the SDAMP case control command points to a nonexistent TABDMP1 bulk data entry; 3) you have PARAM,KDAMP,-1 defined, which if there were any modal damping would convert it to structural damping and it would get added to the K4AAX matrix (which you get due to structural damping, GE being defined on the material entry)...
But, this is also expecting an ASET to reduce the structure to... after all, this is a SE creation run so usually you have an ASET defined for reduction.
The attached run works as you expect, but I arbitrarily selected grids 3 and 7 for the ASET.
I'm not certain of your original intention in exporting these matrices.
OK- this has several issues... 1) Since you do not have a QSET defined, no modes are being solved... so you need to add a QSET and SPOINTS; 2) You didn't actually define any modal damping... the SDAMP case control command points to a nonexistent TABDMP1 bulk data entry; 3) you have PARAM,KDAMP,-1 defined, which if there were any modal damping would convert it to structural damping and it would get added to the K4AAX matrix (which you get due to structural damping, GE being defined on the material entry)...
But, this is also expecting an ASET to reduce the structure to... after all, this is a SE creation run so usually you have an ASET defined for reduction.
The attached run works as you expect, but I arbitrarily selected grids 3 and 7 for the ASET.
I'm not certain of your original intention in exporting these matrices.
