41.1.3.1. GRoad Modeling

Two methods can be used to create the GRoad. One is to directly use the .rdf file and the other is to use the .rdf file after extracting the road patch data from the geometry. Before creating the GRoad, the user must save the model because the local path of the .rdf file is saved to the GRoad and the location of the rdyn file becomes the standard. If the user clicks Import GRoad or Face GRoad without saving the model, the following error message appears.

Figure 41.6 GRoad error message

41.1.3.1.1. Create Method using the .rdf file

1. Enter the Body Edit mode.

   

2. Click Import Groad.

   

3. Select a .rdf file and click Open in the Open dialog box. The .rdf file exists in a folder including the rdyn file because the relative path is used to define the location of .rdf file.

   

Input geometry parameters (TNO rdf file only)

When creating the GRoad by using the .rdf file, the dialog box for creating a geometry appears if the .rdf file is used in MFTire.

The dialog box is same to the road type of MFTire Group. The supported geometries for the TNO rdf file are as follows and for more information, refer to Road Data File.

Table 41.3 Road Type

Vender	Road Type	Method	Road Type	RecurDyn Geometry
TNO (MF,SWIFT)	CRG Road	3D	flat
	CRG Road	3D	crg	Shape defined in file
	drum_road	2D	drum
	flat_road	2D	flat
	p lank_road	2D	plank
	poly line_road	2D	p oly_line
	sine_road	2D	sine

Note

There are two ways to import CRG files. Large CRG files can cause rendering performance degradation problems, so it supports importing flat-shaped rods instead of actual features.

This flat road is only for display. During the simulation, solver use the real road data.

Rdf file example

• MFTire: <Install Dir>\Toolkits\MFTire\Road data files

• UATire: <Install Dir>\Toolkits\GTire\RECURDYN_UA\road_files

• Ftire: <Install Dir>\Toolkits\GTire\COSIN_FTIRE\road_files

41.1.3.1.2. Create Method using the Geometry (UATire)

The UATire model can be used by the rdf file after extracting the road patch data from the desired geometry like as the existing UATire. This road model can be applied to the UATire model. Also, the path of the rdf file is continually saved in GUI because the rdf file of GRoad is used in the solver. If the connection is broken, the user can perform an analysis.

1. Enter the Body Edit mode.

   

2. Create a box geometry for the road modeling.

   

3. Click Face GRoad to select the creation method. The user can select several surfaces by selecting MultiFace, Direction, Direction, WithDialog option to create the GRoad.

   

4. Select a face, the normal direction, the heading direction.