Monostatic RCS Simulation with MONCROS

─ 1.1. Importing the geometry and setting up the layers

There are some important elements that should be taken into account for the geometric modelling:

In this example, we can consider that the default Units and Reference Plane are valid.

In this application, we are going to import an existing geometry. It may have been generated using an external tool, or it can be generated with the CAD modelling tools included in newFASANT. Such geometries can be defined with different formats, such as NUR files (newFASANT native format), IGES, STEP, DXF, MSH, STL, NAS, or others.

In order to import a geometry go to Geometry – Import and select the format and the file. Fig. 1 shows the model after being imported.

Imported Geometry

Figure 1: Imported Geometry

After this procedure, and in order to assign material properties to different surfaces of the model, it is recommended to organize the model in terms of layers. Each layer is a group of surfaces and can be assigned different colors for the visualization. Using the layer manager (Edit – Layers – Manage Layers) it is very easy to enable or disable the visualization of any layer, allowing to inspect parts of the geometry without the graphical clutter introduced by the surrounding surfaces. Note that using layers only affects the visualization of the geometry, but not the simulation itself. The distribution of the surfaces of the geometry in terms of layers for this example is shown in Fig. 2. Different layers have been assigned to the body of the car, the chassis, the glass surfaces (including windows and mirrors) and the wheels.

Classification of the surfaces of the model in terms of layers

Figure 2: Classification of the surfaces of the model in terms of layers

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