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Frequently Asked Questions (FAQ)
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AnswerThe '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:
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.
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.
Importing *.igs or *.stp (STEP) files requires the RX-LINK add-on module (see Figure 01). Exporting is currently not possible.
Additionally, it is possible to import a model with the CAD/BIM option. After selecting the file to be imported, it can be activated in the Options tab of the "New Model - General Data" dialog box (see Figure 02). Using this option, you can additionally convert the geometric elements directly into members, surfaces, or solids after the import (see Figure 03).
As CAD software, SolidWorks currently provides the output via the IGES and STEP interfaces, which can be imported by our software but cannot be exported. For the greatest possible comfort, the CAD/BIM option should be activated (see link).
In addition, it is also possible to exchange data via DXF files. Here, RFEM is also able to export or import 3D structures and surfaces.
AnswerIf you are using members with cross-sections, which are not known be the interface, you should use the mapping file for cross-sections. The mapping file can be easily filled with the names of the cross-sections. In the left column of the table write the names of cross-section used in TEKLA and in the right column you write the DLUBAL names or select them from the library.Please check the attached video.Note:
In TEKLA you have to have loaded the right environment. In the video Chinese cross-sections should be transferred, so the Chinese environment has to be used in TEKLA.
AnswerWith the time history monitor, you can view all results over a period of time. In this case, it is also possible to select several parts of the structure and then export the results directly to Excel.
AnswerIt is possible to export the effective lengths from the add-on module to EXCEL as shown in Figure 1.
AnswerIt is possible to export the effective lengths from the add-on module to EXCEL or import it from EXCEL, as shown in Figure 1.
AnswerYes, that is possible. The output is available in the menu File → Export to DXF. To also include possible stiffening elements, it is necessary to complete the calculation first and then carry out the export. Otherwise, the stiffening elements will not be output in the DXF. The elements such as nodes, supports, and geometry are written into different layers and can be deactivated as required in the CAD program.
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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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