Hello again,
attached you can find 2 files: the .dat file used to start the analysis with nastran, and the .pch imported in matlab.
In these files there isn't my model, but a simple one that I'm using for tests: a plate clamped at one end. Furthermore, they refer to a static analysis performed...
Thank you for answer.
I have already tried to change options about mass, not about the solution methods (I'm always using default options in nastran, which should be the Lanczos algorithm for a real solutions); by the way, I also used another solver (samcef), and results are the same obtained...
Hi everybody,
I need to obtain the stiffness and the mass matrices from 2 different FE models, one is meshed with solid elements and the other one with shell elements.
I created the 2 meshes with virtualab, exported as a .dat file, performed an analysis with nastran and, with a matlab routine...
