In addition to our technical support (e.g. via chat), you’ll find resources on our website that may help you with your design using Dlubal Software.
Frequently Asked Questions (FAQ)
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Beam steering is the angular rotation of antennas under the effect of the present loads (wind, overload, earthquake, deformation, and so on). As an indication, for the GSM, the value of the beam steering must not exceed 1°. This limit of beam steering is often accessible in the clauses of the Technical Specifications of the project.
In RF‑/TOWER Design, it is possible to control the beam steering of antennas for the SLS design. To activate this rotation design of antennas, go to Details → Serviceability.
Figure 01 - Option for Rotation Design of Antennas
As soon as you select this check box, the antennas are available in Window 1.10.2 Serviceability of Antennas. Here, you can enter the angular rotation limit of each antenna.
Figure 02 - Window 1.10.2 - Serviceability of Antennas
After the calculation, the maximum ratio is displayed in Window 2.7 Design by Antenna.
Figure 03 - Window 2.7 Design by Antenna
In comparison with a "normal" surface load, the free rectangular loads have the disadvantage that the load does not graphically get a "cover," and thus the load distribution is not clearly recognizable in the graphic printout.
You can use the display of load distribution in Project Navigator - Results: Thus, the 2D FE elements will be graphically colored, and the corresponding result values will be displayed in the adjacent color panel.
The projection plane and the load direction are different parameters and independent of each other.
While the load direction represents the actual direction of the acting load, the projection plane, together with the corresponding coordinates of the load position, describes the plane from which the load's position is projected onto the surfaces subjected to the load.
In the "Edit Free Rectangular Load" dialog box, the graphic to the right is used for information purposes, see Figure 01.
AnswerYes, it is possible. The FAQ video shows step by step how to create a model of such a component with quadrangle surfaces.
AnswerThis is not possible by default. The load has to be divided into the y- and z-components. Both act simultaniously.
AnswerA free rectangular load can be applied to a freely definable area of a surface. To insert a free rectangular load, select Insert -> Load -> Free Rectangular Loads, the corresponding toolbar button, or use the table.
The problem with the internal forces graphic is due to member divisions. There are several divisions to be observed in RSTAB.
1. Member divisions for results tables
You can create member divisions for result values by using "Insert> Model Data> "Member divisions". This division ensures that z. For example, in RFEM table 4.1, you can also output the internal forces of members to intermediate points. The graphical output remains unchanged.
2. Member divisions for graphical representation
The divisions for the graphical result diagram and determination of the determination of extreme values can be viewed and influenced in the calculation parameters (pull-down menu "Calculation") (see Figure 1).
If you set the value for "Result diagrams" to a larger value, the internal forces graphic is displayed more finely (see Figure 2).
This division into the calculation parameters is considered globally. It is based on the longest member. Therefore, shorter members do not have the same number of divisions, but have similar partial sections.
Therefore, to improve the graphic, it is recommended to apply a finer division of the members (item 2).
It is not necessary to use a different coordinate system to specify the loads. The loads can be applied in local z-direction, if they are to act rectangular to the surface.
Please notice the plane of projection when specifying the loads. From the point that was specified in the section of the load position, a straight line is "constructed" perpendicular to the plane of load projection. If this line intersects with a surface contained in the "On Surface No." list, then the load is applied at the point of intersection. In this way, you can easily apply similar loads on many surfaces.
The boundaries of the surface load are where the grey dotted lines intersect with the surface. The surface load is also displayed in this way when it acts perpendicular to the surface.
For the graphical specification of the coordinates, a local coordinate system might of course be useful.
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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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