USFOS Model

Class Name

• RUSFOSModel

Location in Objects Pane

• Models > Model > External Software > USFOS

Model Description

Model Form

• For users who have USFOS installed on the computer, this model allows parameters to be given to USFOS and results to be returned to Rt.

DDM sensitivities

• No

Properties

Object Name

• Name of the object in Rt
• Allowable characters are upper-case and lower-case letters, numbers, and underscore (“_”).
• The name is unique and case-sensitive.

Display Output

• Determines whether the model is allowed to print messages to the Output Pane.

Parameter List

• List of the parameters that should be mapped into the USFOS model.

Executable List

• Absolute path to the USFOS.exe file, for example:

C:/Program Files/USFOS/bin/usfos.exe

Control File

• Absolute path to the location of the USFOS control file, for example:

C:/head.fem

Model File

• Absolute path to the location of the USFOS model file, for example:

C:/stru.fem

Optional File

• Absolute path to the location of the USFOS optional file

Result File

• Absolute path to the location of the USFOS result file, for example:

C:/res.out

Output

• This model does not automatically create any response objects.
• Rather, creates File Response objects.
• In those objects, specify the name of the USFOS and the name of the file where USFOS puts the response.

Right-click Menu

Remove

• Removes the object.

Example

• To etablish a functioning connection between UFSOS and Rtx and use its results in Rt, the following procedure could be followed:
• It is recommended that the output files of UFSOS are saved in the same directory as Rt's executive file.
• Properties of the UFSOS object has to be filled as it has been described in the properties section.
• List of random variables also has to be defined. Note that these variables have to have a consistent naming as the ones in the UFSOS object
• To extract the results and use them in Rtx analyses, one can create a File Response like this:

• For more information on how to fill out the properties section you can check you can check File Response.
• Finally, a proper Limit State Function should be defined to evaluate failure probability and reliability index, using UFSOS results:
• Before running the analyses, it is recommended to check whether Rtx and UFSOS are well-connected, using Function Evaluation Analyzer.