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Frequently Asked Questions (FAQ)
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AnswerIn RF-MOVE Surfaces, you can also select a circle as a set of lines. In the video, we show a simple example.
AnswerFor irregular member structures, the load generators "From Area Load on Members via Plane" or with "Cells" can be helpful. However, both functions assume that the nodes of the members lie in one plane. In the settings of the load generators, you can increase tolerances for the nodes to also detect nodes that lie outside the plane (see Figure 01). In interaction with the "fictitious lines", it is possible to load even more complex structures.
You can adjust the column individually according to your wishes.
Go to the toolbar and right-click in the empty gray area. Then, go to "Customize".
Now, click the Load Case Description window and it will be highlighted in black.
Now you can go to the right edge of the window and extend it.
AnswerThe new standalone program RWIND Simulation provides you with the options for wind simulation and for generating wind loads. The possibilities can be optimally utilized in conjunction with the FEM structural analysis software RFEM or the structural frame analysis software RSTAB .
InputBy directly importing models from RFEM or RSTAB , you can define 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.
Without RFEM or RSTAB, RWIND Simulation can be run manually. For this, 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 familiar RFEM or RSTAB work environment.
Services of RWIND Simulation
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- 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 aids
- Automatic corrections of the model topology with shrink wrap interconnections
- 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 meshing adjusted to the selected depth of detail
- Parallel calculation with optimal utilization of the performance 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
For this, you can find a setting in the Results navigator of the results from RF-PUNCH Pro.Optionally, you can set the Display navigator to display the result in the form of isolines.
For this, no general recommendation for action can be given.For wall corners and wall ends, the default setting "Non-smoothed shear force over the distribution of the control perimeter" can initially be maintained.After the calculation, you can graphically check the distribution of the shear force in the control perimeter.Optionally, you can now switch to "smoothed" (for example, when singularities occur).Please note, however, that any singularities that may occur are also included in the beta calculation. If necessary In this case, it may also be necessary for the load increasing factor ß to be specified directly by the user.
Currently, there is no direct way to determine the breakdown load. It is important that there are also several different states and thus that there can be several local breakdown loads.
You can assign load increments to a structure and retroactively view the individual load increments and thus find a load factor near a breakdown (depending on the number of load increments).
In the attached model, 20 load increments and saving of the intermediate results have been set (Figure 01). In Figure 02, load step 10 is shown as the last load increment before the breakdown and in Figure 03 the first load step after the breakdown is visible, where clearly the deformation is significantly higher.
AnswerWhen defining nonlinearities, for example failure of a support under tension, it may happen that some load cases can not be calculated. If these are loads that can not occur without other stabilizing loads, solving the problem is simple: You can set the load cases to "Not to be calculated." As a result, only the load combinations are calculated in the "Calculate All" calculation process. This is possible because, for example, some loads can never occur without self-weight.In the attached example, you can clearly see that the system would tip wind in the load case and thus no convergence is found. In contrast to this, it is possible to calculate the load combination in which self-weight and wind are combined, because the self-weight stabilizes the system.
Yes, that is possible.First, RF-STABILITY (or RSBUCK in RSTAB 8) can be used to determine the effective lengths for a particular structure and loading.They can then be imported into RF- / TIMBER Pro in the "Effective Lengths" dialog box.
AnswerIf this error occurs, the download did not run correctly. Please download the program again. Please note that the file can only be executed after the complete download.
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