Flightloads > Aero Mesh Interface File Format > AMIF Format and Reading
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AMIF Format and Reading
The AMIF does not use a fixed format but keep in mind that all numbers will be stored in single precision. That is equivalent to I10 for IDs and 6-8 significant places for real numbers. The appearance of the fields is arbitrary. The standard extension of the AMIF is ami e.g. lann_1.ami.
When reading the AMIF into MSC FLD the grids and panels may be renumbered since MSC Patran requires unique grid and element IDs. While reading the file the aerodynamic super group will be created and within it the component groups will be created. All panels will be stored into their component group. The aerodynamic grids will be gathered accordingly into the groups. Finally, an attempt will be made to create an underlying surface from the elements/nodes of each group. If the attempt fails, you will receive a warning message that allows you to continue or terminate the import. If you continue, then the only effect will be that the group will NOT have an underlying surface associated with the region. This lack should have little or no impact. However, if you desire surfaces, you may wish to continue and double check the elements. Failure may indicate too warped a surface -- it maybe that, by breaking the group into pieces you can obtain a surface.
Element and Node Numbering - The following rules will be applied to your AMIF.
• If the lowest ID of any AGRID is greater than the largest grid ID in the MSC Patran database, the AMIF numbers will be retained. Otherwise, they will be offset.
• Element numbers are ALWAYS reassigned. However, the MSC FLD Options menu element numbering rules will be applied (contiguous IDs in the group with an integer multiple of the increment to determine the next groups stacking ID). An EIDSTART entry will override the options.
 
Hint:  
While importing the aero grid locations the absolute value of the location components are important. The components are checked against the Global Tolerance. If a component is smaller than the Global Tolerance it is not created. So please make sure the Global Tolerance used is correct for the size of your model.