Structure of the PRE File

There are two main types of cards in EDITFEKO:

Geometry cards

Cards used to create geometry and affect the meshing. These cards are used above the EG card.

Control cards

Cards used to define sources, loads, request and control the simulation. These cards are generally below the EG card, but can usually be used above the EG card as well.

The structure of the .pre file consists of the following sections:

1. Specify the mesh parameters.
   1. Define the IP card. All cards following the IP card inherit the mesh settings set with this card.
2. Create the geometry.
   1. Use the geometry cards to define the geometry of the model.
   2. End with the EG card to indicate that the geometry creation is complete.
3. Specify the excitations, loads, frequency and output requests.
   1. Use the control cards to define excitations, specify the frequency and add output requests.
   2. End with the EN card to indicate the end of the file.

For example:

**   Comments at the start the input file
...  Cards that define the geometry ** Comments
EG   End of the geometry
...  Control cards that define sources, special solution options
     and indicate which quantities to calculate ** Card labels / comments
EG   End of the input file