How to create obstacle for the rigid road?

Question

Hi experts,

How to create the road files with many obstacles and road files with CSV files?

Thanks

Christopher_Fadanelli · Answer

Hi Brain,

For polyline, you could have the left and right values be the same.

Please refer to this help link in creating crg road files. It will list what you will need to define the road. https://2023.help.altair.com/2023/hwdesktop/hwx/topics/motionview/road_tools_roads_crg_r.htm

In addition, here is the OpenCRG that can be used. https://www.asam.net/standards/detail/opencrg/

Best,

Christopher Fadanelli

Brian_20847 · Answer

Hi @Christopher Fadanelli,

Thanks for your help.

What about creating CRG? Because with polyline we have 2 tracks (left, and right).

I want to create a road as in the image below:

Community-Pasted-Attachment-1708400446718.png

Community-Pasted-Attachment-1708400526342.png

Christopher_Fadanelli · Answer

Hello Brian, Please refer to the online help for detailed information about creating road files. https://help.altair.com/hwdesktop/hwx/topics/chapter_heads/road_modeling_r.htm For many obstacles, there are options to choose from for 3d spline road that can be added. https://help.altair.com/hwdesktop/hwx/topics/motionview/road_tools_roads_sample_files_r.htm There should also be example road files in your installation directory. Example : "C:\Program Files\Altair\2023.1\hwdesktop\hw\mdl\autoentities\properties\Tires\ALTAIR_ROADS" Is the csv file for the road centerline (can specify that in the driver event)? XZ data for a polyline (place values in an .rdf file, see example polyline files in installation directory) ? rdf Example: $---------------------------------------------------------------UNITS [UNITS] LENGTH = 'meter' FORCE = 'newton' ANGLE = 'degrees' MASS = 'kg' TIME = 'sec' $----------------------------------------------------------DEFINITION [MODEL] PROPERTY_FILE_FORMAT = 'USER' FUNCTION_NAME = 'mbdtire.dll::ROAD_ALTAIR' METHOD = '3D_SPLINE' $-----------------------------------------------------ROAD_PARAMETERS [GLOBAL_PARAMETERS] CLOSED_ROAD = 'NO' SEARCH_ALGORITHM = 'FAST' ROAD_VERTICAL = '0.0 0.0 1.0' FORWARD_DIR = 'NORMAL' MU_LEFT = 1.2 MU_RIGHT = 1.2 WIDTH = 12.000 $---------------------------------------------------------DATA_POINTS [DATA_POINTS] { X Y Z WIDTH BANK MU_LEFT MU_RIGHT OBSTACLES } -1 0 0 0 0 0 0 0 0 0 0 0 OBSTACLE4 5 0 0 0 0 0 0 OBSTACLE1 8 0 0 0 0 0 0 OBSTACLE5 11 0 0 0 0 0 0 OBSTACLE2 15 0 0 0 0 0 0 OBSTACLE6 19 0 0 0 0 0 0 OBSTACLE7 25 0 0 0 0 0 0 OBSTACLE3 $-----------------------------------------------------END_DATA_POINTS [OBSTACLE1] ROAD_TYPE = 'PotHole' COORDINATE_SYSTEM = 'distance' START = 0 LENGTH = 2 DEPTH = -0.5 $-----------------------------------------------------END_OBSTACLE1 [OBSTACLE3] ROAD_TYPE = 'Plank' START = 0 HEIGHT = 0.1 LENGTH = 3 BEVEL_EDGE_LENGTH = 0.01 $-----------------------------------------------------END_OBSTACLE3 [OBSTACLE4] ROAD_TYPE = 'Ramp' START = 0 LENGTH_RAMP = 1 LENGTH_TOTAL = 3 SLOPE = 30 $-----------------------------------------------------END_OBSTACLE4 [OBSTACLE5] ROAD_TYPE = 'Roof' START = 0 HEIGHT = 0.25 LENGTH = 2 $-----------------------------------------------------END_OBSTACLE5 [OBSTACLE6] ROAD_TYPE = 'Sine' START = 0 AMPLITUDE = 0.1 WAVE_LENGTH = 0.0125 LENGTH = 2.5 $-----------------------------------------------------END_OBSTACLE6 [OBSTACLE7] ROAD_TYPE = 'Sweep' START = 0 AMPLITUDE_AT_START = 0.2 AMPLITUDE_AT_END = 0.01 WAVE_LENGTH_AT_START = 0.02 WAVE_LENGTH_AT_END = 0.01 LENGTH = 5 sweep_type = 0 $-----------------------------------------------------END_OBSTACLE7

Best,
Christopher Fadanelli