This entity is used to define a tracked vehicle that interacts on the terrain without modeling any individual track link parts. You can define an interaction region between track and terrain by assign multiple contact points. This entity significantly reduces the analysis time for a tracked vehicle system. Therefore, it is useful to review the dynamic behavior of the tracked vehicle system in the early conceptual design stage. For your convenience, some terrain characteristic data is provided as a library. If you have more precise terrain data, you can modify this library. As a result of the analysis, you can obtain summation of the contact force, soil force and so on.