Import Model

Import all data required for the squeak and rattle analysis preparation.

You can import a model file as a Solver Deck (.fem) or as a HyperMesh database file (.hm). You can import and restore a previous session with existing E-Lines.

You can import a DTS file containing predefined gap and tolerance values for all the interfaces to evaluate and a material database file with compatibility data from Stick-Slip tests. If a material database file is unavailable, you can connect to Ziegler Material Database. For more information, see Ziegler PEM Material Database.

  1. From the SnRPre ribbon, Setup group, select the Import tool.
    Figure 1.
    The Model Import dialog opens.
  2. Click to select a model to import.
  3. Optional: Click to specify DTS and material files.
    Figure 2.
  4. Click Import.
    Note: Once the files are specified, Squeak and Rattle Director will make a copy of these files to a working directory in the same directory as the model file. The name of the working directory will follow the name of the model file and suffixed with _SNRD. For example, if the model file name is SnR_demo_model, then the name of the working directory will be SnR_demo_model_SNRD.
    The selected model, default, or DTS, and material files are imported to the HyperMesh Desktop session.
  • For a new model, you can start the E-Line Setup.
  • For a model with existing E-Lines, all previously created E-Lines will be visible in the model.
  • If a model contains existing E-Line(s), you have an option to restore E-Lines information from a pre-output CSV file or from the data stored in the file itself. The latter option is only available for .hm files.
    Restriction: Existing E-Lines in a Solver Deck can not be restored without a pre-output CSV file, which can only be created at Export. Save the progress in the .hm file.
    Figure 3.

Import Options

Learn more about the available import options.

Model File
The user-defined DTS data is imported, and you can map an interface name to the corresponding E-Line using the Manage E-Line tool.
Supported file formats:
  • *.hm: HyperMesh models.
  • *.fem: OptiStruct solver decks.
DTS File
The user-defined Material database is imported, and you can map material to corresponding squeak lines in the Manage E-Line tool.
A Dimension Tolerance Specifications (DTS) file is a *.csv file containing the manufacturing tolerance between the components in the model.
Figure 4.
Material File
A Material file is a *.csv file containing the user-created material stick-slip data.
Figure 5.
Note: The default Material and DTS files can be used as templates. They can be found here: <Altair Installation Directory>\hwdesktop\mv\scripts\tcl\snr\pre\config.