Exporting Parasolid from SolidWorks
From PHASTA Wiki
Save out your Model as a parasolid from SolidWorks. Note that you will want the geometry as close to ready for meshing as possible, as performing model "surgery" in simmodeler is not always straight forward. The outputted file will have the format <file_name>.x_t. Next, you'll want to change the extension from .x_t to .xmt_txt. To do this, run mv <file_name>.x_t <file_name>.xmt_txt
from your terminal. From here, you are ready for the convert step, which is documented here [1]. Once this is complete, you are ready to use Getting Started with Simmodeler/ simmodeler.