What is a Collision Operation?
The collision operation function reflects the influence of
other objects upon the motion of an object. This function allows
the user to create complex motions caused by the collision of two objects. The simulation
is performed by using both the object that collides (the
collision object) and the elastic
model object(the target object) in the
calculation peformed by MD.
Direction of the surface
The collision operation works when the target object collides with the surface of the collision object polygon. Note that the target object simply passes through if it collides from the rear.
In order to use the collision operation inside a container, for example, the collision object needs have its polygons flipped in Modeler so that the "solid side" faces the collision target.
Adjusting the Skin thickness
The collision operation is performed between a point on the target object and a polygon of the collision object. For this reason, a polygon of the target object may penetrate the collision object.
In this case, the distance within which collision occurs can
be adjusted by adjusting the Skin Thickness
on the Surface panel. This allows the gap between the
collision object and the target object
to be adjusted in order to prevent the objects going through each other.
Specify Skin Thickness for the surface of the collision object, not the surface of the target object. Select the surface on the Surface panel, and enter the thickness in meters in Skin Thickness. Also specify the other parameters such as the friction caused by the collision.
