Creating a User-Defined Platform for Use in RF-/TOWER Equipment

Technical Article on the Topic Structural Analysis Using Dlubal Software

  • Knowledge Base

Technical Article

The following technical article describes the creation of a user-defined platform for use on a four-sided tower in the RF-/TOWER add-on modules. First, start with an empty model of the 3D type and define four nodes. The numbering and position of these nodes are very important here.

Node 1 lies in the positive quadrant, which means in the positive X- and Y-directions. Set the following nodes clockwise so that node No. 4 is set in the negative Y-direction, but in the positive X-direction. These four nodes will later be connected to legs one to four. The dimensions are not important now, but should be square.

Image 01 - Defining Nodes 1 to 4

Afterwards, you have to parameterize nodes one to four so that they can be adjusted to the tower width in the add-on module.

The width in the X-direction is defined as parameter "a", the width in the Y-direction as parameter "b".

Image 02 - Creating Parameters "a" and "b"

In the following text, the node coordinates are assigned the parameters +/- a/2 b/2.

Image 03 - Parameterize Nodes 1 to 4

Image 04 - Further Parameterization of Nodes 1 to 4

At the end, all four nodes must be parameterized for the coordinates X and Y. If everything is correct, all X- and Y-coordinates have a yellow triangle.

Image 05 - All Nodes Must Be Parameterized

Please note: At this point, it makes sense to save this model as a template for future user-defined platforms, as the steps will be the same up to this point. This template saves valuable time.

Image 06 - Save as Template ...

With this basis, it is now possible to set all members and entries of the platform. It is not absolutely necessary to parameterize all nodes from this point. It would, for example, be possible to define the correct model dimensions (nodes 1 to 4 must then be defined with the model dimensions as parameters) and then to import the platform 1:1. However, if you want to import the platform to other towers and masts, it is also useful to use a consistent parametrization. The node numbering is no longer specified from this point, but it makes sense to follow a principle. For example, you could define the node numbers 10 to 19 on side F (+Y-direction), nodes 20 to 29 on side L (-X-direction), and so on. This way, it is easier to assign the antenna brackets, because a side can be assigned by means of the node number.

The platform shown in this example has been completely parameterized.

Image 07 - User-Defined Parametrized Platform

In the next step, the model is saved as a block in the corresponding folder of RF-/TOWER. To do this, select all elements and save them as a block.

Image 08 - Save as Block ...

Image 09 - Storage Location for RF-/TOWER Equipment

This platform can now be selected and inserted in each four-sided mast or tower from the library in RF-/TOWER Equipment.

Image 10 - Selection in RF-/TOWER Equipment

Image 11 - Inserted platform in RF-/TOWER attachments

Author

Dipl.-Ing. Oliver Metzkes

Dipl.-Ing. Oliver Metzkes

Product Engineering & Customer Support

Mr. Metzkes is responsible for the development in the area of steel structures and provides technical support to our customers.

Keywords

Platform Mast Tower User-defined

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  • Updated 27 October 2021

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