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  • Answer

    The 'Simulate and Generate Wind Loads' function for exporting models to RWIND Simulation is available in RFEM or RSTAB from version x.21.01 of 22.10.2019.

    With a valid service contract you can download the current program version from your Dlubal account. It is enough to log in here:

    If you do not have a service contract, you can download the program version you have purchased on the following page:

  • Answer

    The Dlubal toolbar is available to the user after carrying out a successful installation of the interface. Use the corresponding components to control the export to RFEM. To do this, simply drag and drop them into the programming interface. An import from RFEM is not possible.

    Communication between Grasshopper and RFEM is enabled by the 'RFEM 5 COM Component'. Once this component with geometric information is activated, the export is started. An opened RFEM file is supposed. It is also recommended to use an empty file because the export procedure overwrites or deletes all information. An update mechanism is currently not implemented.
    The 'RFEM 5 Member Component' allows the user to attach additional information to the geometry (lines, curves). These are taken into account when exporting to RFEM so that the members can be created. The name of material and cross-section has to be entered in a text box (panel). The member rotation can be defined by means of a 'Number Slider' in [rad].
    The 'RFEM 5 Surface Component' is to be used analogously to the 'Member' component. There is supposed a surface when entering the geometry. Using a panel, it is possible to attach the material to them. The thickness of the surface is defined by a number slider in [m]. The stiffness type of the surface can be controlled by means of a 'Value List' with predefined types.

    The Grasshopper file relating to graphic has been saved for download. You only have to define the connecting lines for the final export.

  • Answer

    In principle, the handling of the interface is very simple. After carrying out a successful installation, the Dlubal toolbar is available in Rhino. This includes two icons (Export and Import).

    Using 'Import', it is possible to import data from RFEM to Rhino. It is always imported the whole RFEM model. No update shall be performed in this case. The data is added to the existing structure.
    Click 'Export' to export data from Rhino to RFEM. Normally, the entire structure is exported. If you only want to export parts of the structure, select them before starting the export. It is necessary to start the RFEM and create a file to carry out the export. Please note that the export procedure overwrites all existing data of the opened file. Therefore, it is recommended to open an empty file.

  • Answer

    Yes, it is possible to create a video file in RWIND Simulation. Arrange the graphic on the screen and select the menu ‘Tools → Create Video File’.

    In the 'Create Video File' dialog box (Figure 1), you can define the name of the video file in a separate dialog box using the [Search] button. It is possible to select different video file types. Moreover, the quality and the recording frequency can also be adjusted.

    Click the [Start] button to start the recording and the [Stop] button to stop it.
  • Answer

    Description of different load combinations must not be identical otherwise the error message shown in Figure 1 will be displayed. The relevant load combination can be taken from the error message (in Figure 1 Load Combination No. 2). 

    The model shown in Figure 2 contains the load combination LC1 and LC2. Both load combinations have the same description 'ULS'. It is necessary to change one of the two descriptions so that an import is possible.

  • Answer

    Due to modeling inaccuracies, the import is not possible so that the error message shown in Figure 1 is displayed. Thus, the surface 1 shown in Figure 2 is not absolutely planar. The coordinate X of nodes 1-4 is not equal. If this modeling inaccuracy is eliminated, the import is possible.
  • Answer

    In RFEM, the graphical results are smoothed on the basis of the results at FE mesh points. The results are transferred to REVIT on the basis of the results on grid points. In RFEM, the grid for the surfaces is set to 0.5 m by default. Set a fine grid for the surfaces and the graphical display of the results in RFEM and REVIT is comparable.
  • Answer

    Background layers can be hidden or displayed in the Display Navigator under Guide Objects → Background Layers. The visibility can be defined individually or for all.

  • Answer

    Background layers can be hidden or displayed in the Display Navigator under Guide Objects → Background Layers. The visibility can be defined individually or for all.

  • Answer

    The cross-sections created with SHAPE-THIN can be loaded via the cross-section library. To do this, click the 'Import Cross-Section from Program SHAPE-THIN' button in the 'New Cross-Section' dialog box (Figure 1).

    The dialog box 'Import Cross-Section from Program SHAPE-THIN' involves the following directories (Figure 2):

    • all directories that are included in the Project Manager of RFEM 5, RSTAB 8, SHAPE-THIN 8, etc.
    • all directories that are included in the Project Manager of previous program versions of SHAPE-THIN such as SHAPE-THIN 7

    With the "Search for SHAPE-THIN Cross-Section" button (Figure 3) it is possible to search for cross-sections in directories that are not integrated in the Project Manager. The searched directory is then added to the directory list of the 'Import Cross-section from Program SHAPE-THIN'.

    The desired cross-section can be selected and imported from the respective directory. Please note that the cross-sections must be calculated and saved in SHAPE-THIN before the cross-section values can be loaded. It is only possible to import each cross-section individually.

    When importing a SHAPE-THIN cross-section into RSTAB/RFEM, this cross-section is imported into the user-defined cross-section library. The user-defined cross-sections can be imported using the "Load Saved User-Defined Cross-Sections" button of the cross-section library (Figure 4). If you want to update the cross-section in the user-defined cross-section library, import the modified cross-section once more. The security query must be answered with 'Yes' (Figure 5).

    The video initially demonstrates how the BRIDGE cross-section from the folder Examples linked in the Project Manager is imported. Then, the cross-section example-1 is imported from the Desktop directory that is not linked to the Project Manager. The cross-sections are now available in the user-defined cross-section library. By way of example, the cross-section Example-1 in RFEM is deleted and pasted into the user-defined cross-section library. Subsequently, it is demonstrated how the Example-1 cross-section is changed to SHAPE-THIN and imported into RFEM.

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First Steps

First steps

We provide hints and tips to help you get started with the main programs RFEM and RSTAB.

Wind Simulation & Wind Load Generation

With the stand-alone program RWIND Simulation, wind flows around simple or complex structures can be simulated by means of a digital wind tunnel.

The generated wind loads acting on these objects can be imported to RFEM or RSTAB.

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