Problem in acoustic modes analysis 1

[Dan90]

Hello to everyone,

I am having problems with a eigenvalues analysis. In particular I need to extract the acoustic modes from my model.

I have created a fluid material (mat10), specifying all the properties needed, but when I run the analysis the following fatal error appears:

*** USER FATAL MESSAGE 2113 (EMG)
ELEMENT 1 REFERENCED MATID 1 WHICH CANNOT BE USED TO OBTAIN REQUIRED PROPERTIES.
User information:
A search procedure in MAT allows any possible MATi entry to be
referenced under any INFLAG. However, only certain material formats
can be used to construct the required output in /MATOUT/.
Make certain the element can reference the material entry type.

And that's for 100 element. Could anyone help me with this issue? Which material should I create?

 

[Dan90]

Ok guys, to whom it may concern I solve the problem.

The issue lay in the PSOLID property format which did not respect what is written in the NX Nastran QRG at page 2220 (Bulk data entries -PSOLID).