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  • Answer

    The RWIND Simulation program is protected against unauthorized use. If the software key is authorized, the program is only authorized for a specific activation period, which must be defined by the user. After this period, the program automatically switches to demo mode; the previously used license is again freely available for a new activation. To avoid reactivation on the same standalone computer, it is possible to renew the license online (computer is connected to the Internet) by specifying a new activation period before the activation period expires. To do this, proceed as follows:

    1. Run RWIND Simulation 'As Administrator'. To do this, right-click the RWIND Simulation icon and select 'Run As Administrator'.

      Figure 01 - Program Start

    2. Select the 'RWIND Simulation - License and Authorization' function in the "Help" menu.

      Figure 02 - License and Authorization Settings

      This opens the 'RWIND Simulation 1.xx Authorization Status' dialog box.

    3. Check in the 'RWIND Simulation 1.xx Authorization Status' dialog box whether an active software key authorization is available. This is the case if the 'Software Key' option is selected in the 'Authorization Method' section, and an active authorization is indicated by a green dot in the 'Authorization Status' section.

      Figure 03 - Authorization Status

      If the check turns out to be negative and a red dot is displayed, no RWIND Simulation license based on a software key is activated on the single-user computer. As a result, the activation period for a license cannot be extended.

      If the specified requirements are met, click the 'Extend Activation Online' button. The 'Renew Activation - Online' dialog box appears.

    4. The 'Renew Activation - Online' dialog box shows the license specification to be extended.

      Enter your online activation key based on your contract documents and define the new activation period in the date field.

      Then, start the online renewal with the function 'Renew Activation Now'

      Figure 04 - Extension of Activation

      This opens the 'RWIND Simulation 1.xx' dialog box.

    5. In the 'RWIND Simulation 1.xx' dialog with the confirmation prompt about the planned modification select 'OK' to finally change the activation period.

      Figure 05 - Confirmation Prompt

      After successfully changing the activation period, you receive a confirmation message and can use the program without restrictions.
    Thus, your purchased license is used in our system for the newly defined activation period. During this time, it is not possible to activate the RWIND Simulation program with the activation key on any other computer. The assignment of the license in our system ends with a proper deactivation or after the defined activation period has expired.

    To avoid unnecessary license assignments in our system due to unexpected computer problems on your part (defect, loss, hardware replacement, change of employees, etc.), we recommend keeping the activation period as short as possible.

  • Answer

    The program RWIND Simulation is protected against unauthorized use. The program can be authorized offline (computer is not connected to the Internet) by activating an email. To do this, proceed as follows:

    1. Execute RWIND Simulation 'As Administrator'. To do this, right-click the RWIND Simulation icon and select "Run as Administrator".

      Figure 01 - program start

    2. Confirm the authorization check with the 'Activate Now' function.

      Figure 02 - Authorization check

      This opens the "RWIND Simulation 1.xx Demo Authorization Status" dialog box.

    3. In the "RWIND Simulation 1.xx Demo Authorization Status" dialog box, select the "Software Key" option in the Authorization Method area and click the "Activation via E-Mail" function in the lower part.

      Figure 03 - Email Activation

      This opens the "Activation by E-Mail" dialog box.

    4. In the "Activation by E-Mail" dialog box, enter your license information (license number and/or name and address of the institution that purchased the program license) based on your contract documents.

      Furthermore, enter a user-defined description of the workstation to be activated under "Description of workspace" and the RWIND Simulation level with an expiry date of the activation to be carried out under "Required authorization".

      Then confirm your entries by clicking the "Generate Request Code" function.

      Figure 04 - Generate Request Codes

      This opens the "RWIND Simulation 1.xx Demo" dialog box.

    5. Check the entries made in the "RWIND Simulation 1.xx Demo" dialog box. If they are OK, confirm the dialog box with "OK."

      Figure 05 - Checking the entries

      This opens the "Activation by E-Mail" dialog box.

    6. The "Activation via E-Mail" dialog box consists of three parts. In the "Step 2" tab, the required request code is displayed on the left. Copy this text block to the Windows clipboard with the "Copy Request Code" function and then paste the code into a blank e-mail with [Ctrl] + [V] or the Windows paste function. Send this email to support@dlubal.com for further processing.

      Figure 06 - Send request code

    7. You will receive an activation code from us. In the dialog box, go to the "Step 3" tab and enter this code in the "Activation Code" field.

      Then, start the activation process by clicking the "Activate Now" function.

      Figure 07 - Program activation

      After successful authorization, you will receive a confirmation message and it is possible to use the program without any restrictions.
    This offline email activation occupies the license you have purchased for the defined activation period in our system. During this period, it is not possible to activate the program RWIND Simulation with the same license on any other computer. The assignment of the license in our system ends with a proper deactivation or after the defined activation period has expired.

    Afterwards, the activation process can be carried out again on the same or a different computer. Please note that e-mail request codes can only be used once for activation. To reactivate, a new request code must always be sent to us.

    To avoid unnecessary license assignments in our system due to unexpected computer problems on your part (defect, loss, hardware replacement, employee change, etc.), we recommend that you keep the activation period as short as possible.

  • Answer

    In addition to the components for describing the load type, location, and language, the request URL also includes components for describing the user's identity. The 'login' component describes the user's e-mail address and the 'hash' component describes a hidden password. For a functional login, the e-mail address must be saved in a valid Dlubal account.

    If you do not have a Dlubal account yet, you can create it on this page:

    https://www.dlubal.com/en-US/extranet/create-new-account

    After having successfully logged in to your Dlubal Account in the top left corner of our website,

    Figure 02 - Login to Dlubal Account
    https://www.dlubal.com/en-us

    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

  • Answer

    The program RWIND Simulation implements a stationary flow calculation for non-compressible gases. The laws and wording used in this way do not change over time. Thus, the calculation outputs a result set without temporal variation.

    [1] The effect of a 'Kármán vortex street', in which counter-rotating vortices develop behind a body around which flows, results in a temporal change of the flow effect. Therefore, this fluid-mechanical effect cannot be simulated in RWIND Simulation.


  • Answer

    The new standalone program RWIND Simulation provides you with the options for wind simulation and for generating wind loads. The options can be optimally utilized in conjunction with the FEM structural analysis software RFEM or the structural frame analysis software RSTAB.

    Input
    The direct adoption of models from RFEM or RSTAB makes it possible to determine relevant parameters of the wind directions to be analyzed with height-dependent wind profiles on the basis of a wind standard. This results in the corresponding load cases with globally defined parameters.

    The RWIND Simulation can also be run manually if there is no RFEM or RSTAB. For this reason, the data can be imported from STL vector graphics.

    The import of terrain and buildings of the environment into the simulation is also possible from STL files.

    By exchanging data between RFEM or RSTAB and RWIND Simulation , you can easily use the wind analysis results as load cases in your usual RFEM or RSTAB work environment.

    Services of RWIND Simulation
    • 3D incompressible wind flow analysis with OpenFoam solvers
    • Direct model import of RFEM or RSTAB or STL files
    • Simple model changes using Drag and Drop and graphical adjustment assistance
    • Automatic corrections of the model topology with shrink wrap networks
    • Option to add objects from the environment (buildings, terrain, ...)
    • Height-dependent velocity profiles according to the standard
    • K-epsilon and K-omega turbulence models
    • Automatic mesh generating adjusted to the selected depth of detail
    • Parallel calculation with optimal utilization of the capacity of multicore computers
    • Results in just minutes for low-resolution simulations (up to 1 million cells)
    • Results within a few hours for simulations with medium/high resolution (1-10 million cells)
    • Graphical display of results on the Clipper/Slicer planes (scalar and vector fields)
    • Graphical representation of streamlines as well as streamline animation
  • Answer

    The program RWIND Simulation is protected against unauthorized use. The program can be authorized via an online activation (computer is connected to the Internet). To do this, proceed as follows:

    1. Execute RWIND Simulation 'As Administrator'. To do this, right-click the RWIND Simulation icon and select "Run as Administrator".

      Figure 01 - Program Start

    2. Confirm the authorization check with the 'Activate Now' function.

      Figure 02 - Authorization Check

      This opens the "RWIND Simulation 1.xx Demo Authorization Status" dialog box.

    3. In the "RWIND Simulation 1.xx Demo Authorization Status" dialog box, select the "Software key" option in the Authorization Method section and click the "Activate Online" function in the lower part.

      Figure 03 - Online Activation

      This opens the 'Online Activation' dialog box

    4. In the 'Online Activation' dialog box, enter your license information (license number, activation key, and RWIND Simulation level) based on your contract documents.

      Furthermore, enter an expiration date of the activation to be carried out in the middle field and a user-defined description of the work center to be activated in the bottom field.

      Then start the activation process by clicking the 'Activate Now' function.

      Figure 04 - Program Activation

      After successful authorization, you will receive a confirmation message and it is possible to use the program without any restrictions.
    This online activation uses your purchased license for the defined activation period in our system. During this time, it is not possible to activate the program RWIND Simulation program with the activation key on any other computer. The assignment of the license in our system ends with a proper deactivation or after the defined activation period has expired.

    Then, the activation process can be carried out again on the same or a different computer with the existing activation key.

    To avoid unnecessary license assignments in our system due to unexpected computer problems on your part (defect, loss, hardware replacement, employee change, etc.), we recommend that you keep the activation period as short as possible.

  • Answer

    In Figure NA.1A, there is a snow load zone map of Germany displayed by DIN EN 1991-1-3/NA. The exact assignment of snow load zones of the administrative units, in particular in the area of the zone boundaries, must be requested from the competent authorities. The German Institute for Building Technology DIBt publishes a table 'Allocation of Snow Load Zones According to Administrative Boundaries' for each federal state on the website https://www.dibt.de/en/service/notices/
     
    For locations of snow load zones 1 and 2 in the North German Plain, it is also necessary to check if they are within the meaning of DIN EN 1991-1-3/NA, Section 4.3, Defined Regions. For these locations, the table 'Allocation of Snow Load Zones According to Administrative Boundaries' shows the footnote 'North German Plain'. 

    According to DIN EN 1991-1-3 and DIN EN 1991-1-3/NA, higher values than specified in DIN EN 1991-1-3 and DIN EN 1991-1-3/NA may result for certain layers of the snow load zone 3. These locations are displayed in the table 'Assignment of Snow Load Zones According to Administrative Boundaries'.

    In addition, it is necessary to consider the results of the research project of the German Meteorological Service called 'Surface analysis of snow load data in five counties and their comparison with the snow load zone data of DIN 1055-5: 2005 as a pilot study for the revision of the snow load zone map'.

    These special conditions are also available in the Dlubal Online Service. The snow load zones with special regulations are indicated by an asterisk. The special control is also displayed as a comment in the snow load zone. Figure 1 shows the snow load zone 3* for the city of Altenau. For Altenau, an increased snow load has to be taken into account. This is also displayed as a comment.
  • Answer

    The online service 'Snow, Wind, and Seismic Zone Maps' can only save a constant value over a surface area.


    Figure 01 - Zone Classification

    If the respective load standard specifies an isolines representation of the load over the land instead of a conventional zone classification, the interactive load map shows the areas between the isolines as zones with a constant value. In each case, these zones are assigned the larger value of the two enclosing isolines.


    Accordingly, this 'stepped' load presentation of locations between the isolines leads to a conservative load determination.



  • Answer

    If the selected general national annex is EN 1991-1-3, the program allows you to enter any value.

  • Answer

    No, they are not included by default. The wind load generation using surface loads always determines the wind load that is orthogonal to the spanned surface.
    For the attached example, however, Figure 02 shows that the loading in the wind load surface amounting 0.5 kN/m² is relatively easy to convert.

    It is also possible to generate the wind load for any building geometry with the new stand-alone program RWIND Simulation. This provides you with the possibilities for wind simulations and generating wind loads.
    In conjunction with the structural FEA software RFEM or the structural frame analysis software RSTAB.

    Input
    The direct import of models from RFEM or RSTAB allows you to define the relevant parameters for the analyzed wind directions with the height-dependent wind profiles, based on the wind standard. This results in the corresponding load cases with globally defined parameters.

    Without RFEM or RSTAB, RWIND Simulation can also be run manually. Furthermore, you can import the data from the STL vector graphics.

    It is also possible to import terrain and buildings of the environment into the simulation from the STL files.

    By exchanging the data between RFEM or RSTAB and RWIND Simulation, you can easily use the results of the wind analysis as load cases in your usual RFEM or RSTAB work environment.

    Features of RWIND Simulation
    3D incompressible wind flow analysis with OpenFoam solvers
    Direct model import from RFEM/RSTAB or STL files
    Simple model changes using drag & drop and graphical adjustment assistance
    Automatic corrections of the model topology with shrink wrap networks
    Option to add objects from the environment (buildings, terrain, ...)
    Height-dependent velocity profiles according to the standard
    K-epsilon and K-omega turbulence models
    Automatic mesh generating adjusted to the selected depth of detail
    Parallel calculation with optimal utilization of the capacity of multicore computers
    Results within a few minutes for low-resolution simulations (up to 1 million cells)
    Results within a few hours for simulations with the medium/high resolution (1‑10 million cells)
    Graphically display of results on the Clipper/Slicer planes (scalar and vector fields)
    Graphical display of streamlines and streamline animation

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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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