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Frequently Asked Questions (FAQ)
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In addition to the building to be analyzed, the RWIND Simulation program allows you to consider neighboring buildings in the numerical wind tunnel. To do this, the program provides the 'Import Model from File' function in the 'Insert' menu.
Figure 01 - Importing Model
With this import function, RFEM or RSTAB models can be imported into the wind flow environment via the *.vtp format and stereolithography models via the *.stl format. The imported models are organized separately in the numerical wind tunnel next to the main model. An overview of the imported models is shown in the project navigator under the 'Model'.The additionally imported models are implemented in the simulation environment similar to the main model and considered in the overall analysis. At the end of the calculation, the program displays the wind flow and resulting surface pressures on the main model and all imported add-on models.The *.vtp format is currently only used internally for the exchange of data between RWIND Simulation and RFEM or RSTAB.
If there is no *.stl format available from the neighboring models, it is possible to create a corresponding *.stl model by using the model export function in RWIND Simulation. To do this, proceed as follows:
- Save the model to be analyzed under a new name.
- Create in the copied model related to the analyzing model the desired neighboring model using member, surface and solid elements.
- Delete the model to be analyzed so that only the neighboring model remains in the environment
- Open the RWIND Simulation interface menu 'Simulate and Generate Wind Loads'
- Set the focus to the 1st line in the 'Load Cases' tab and push the neighboring model into the wind tunnel with the 'Open in RWIND Simulation' function.
- Right-click the neighboring model in RWIND Simulation and select the 'Export Selected Models' function
- Confirm the export of the original neighboring model with 'Yes' in the confirmation prompt and save the corresponding *.stl model.
- Save the model to be analyzed under a new name.
AnswerIn the navigator of the printout report, some chapters are marked with a red pin. This chapter starts a new page.If you remove the pin you will not get any space on your sheet, and the chapters will be moved together.
AnswerNo, this is not possible.The member elastic foundation is basically constant over the length of the member.If you want to enter a variable member foundation based on the height of the bored pile, you have to divide the bored pile into individual members and specify different constant foundations on the individual members. Thus, the linear distribution of a foundation can be approximately simulated.
AnswerThe load case descriptions, load case numbers and also units can be hidden in the 'Project Navigator - Display'.
AnswerYes, for the nonlinear calculation in RF-CONCRETE Members, it is possible to select the high-strength steel SAS 670 for the design. In this way, you can perform stability analysis for columns, among other things.The steel can be selected in the Materials section of the module (see Figure 01). Since DIN EN 1992-1-1 only allows fyk = 500 N/mm² by default, this limit must be adjusted when using SAS 670.In the general data, you can create a user-defined National Annex where the maximum value of yield strength is increased to fyk ≥ 670 N/mm² in Point 3.2 (see Figure 02).
In addition to the blocks for describing the load type, location and language, the request URL also includes blocks for describing the user's identity. The "login" module describes the user's e-mail address and the "hash" module describes a hidden password. For a functional login, the e-mail address must be stored in a valid Dlubal account.
If you do not have a Dlubal account yet, you can create an account on this page:
https://www.dlubal.com/en-US/extranet/create-new-accountWith successful login to your Dlubal Account at the top left corner of our website
Figure 02 - Login to Dlubal Account
the "My Account" page opens. Under the heading "User Data", you can find the identity components "login" and "hash" at the bottom for using the Geo-Zone Tool web service function.
Figure 03 - Web Service Identity in Dlubal Account
For a fast work in RSTAB and RFEM, the drag & drop function is very helpful. For this, this option must be activated in the shortcut menu (Figure 01).
If you click a member or a line near the start/end node in the work window, you can quickly define the new connection point graphically.
However, if you grab a member or a line in the middle third, you can simply move the element to a new position.
If you additionally press the "Ctrl" key, the marked elements are copied.
The video first shows how to move the head point of member 2 from node 2 to node 4. Afterwards, it is shown how member 2 is moved to a new position.
It is possible to disable the display of the model in the Project Navigator View. Then only the loads are displayed. Another option is to edit the loads via the table.
The video shows both options using a simple example.
AnswerThe simultaneous processing of RFEM or RSTAB files is not possible. When you open the corresponding file, it is locked and prepared for use in RFEM or RSTAB in the user's local working directory. Any other user can then open the RFEM or RSTAB file as a copy. A multiuser mode is not planned in the medium term.
When printing a graphic in the printout report, you can select the position of the color scale in the "Color Scale" tab. Furthermore, you can adjust the size of the color scale in the same dialog box. If the "No color scale" check box is deactivated (Figure 1), it is displayed in the graphic in the printout report.
If a graphic has already been inserted into the printout report without a color scale, you can display the color scale retroactively. To do this, right-click the picture. Then, select the properties in the shortcut menu (Figure 2) to open the "Color Scale" tab. Here, it is also possible to edit the position and the size of the color scale.
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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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