27.2.3. Double Wheel
A body consisting of three cylinder geometries is defined. The width and depth of the double wheel valley must be large enough for the track link center guide to pass.
Figure 27.21 Double wheel geometric entity
Figure 27.22 Double wheel dimension information
Ri |
Hub radius |
Ro |
Wheel radius |
Wi |
Hub width |
Wo |
Double wheel total width |
27.2.3.1. Modeling Options
The user can create a double wheel as follows.
Point, Distance
Point: Selects a point to define the center of the double wheel.
Distance: Defines a distance of the double wheel.
27.2.3.2. Properties
Figure 27.23 Double Wheel property page [Geometry Data page]
The Double Wheel property page is shown in Figure 27.23. The parameters are explained below. In order to understand the geometry, refer to Dimension Information.
Hub Radius (Ri): Enters the hub radius of wheel.
Wheel Radius (Ro): Enters the radius of wheel.
Hub Width (Wi): Enters the hub width of wheel.
Total Width (Wo): Enters the total width of wheel.
Contact between double wheel and track links
Each road wheel of the vehicle model offered in RecurDyn/Track_HM consists of two wheels that are rigidly connected. There are four different possibilities for the double wheel and track contact.
The track link - one wheel of the double wheel
In this case, a concentrated contact force is used at the center of the contact surface of the wheel. The contact force acting on the link is assumed to be equal in magnitude and opposite in direction to the force acting on the double wheel.
The track link - both wheels of the roller
In this case, two concentrated contact forces are applied to the double wheel and the track link.
The edges of track link - either one wheel or both wheels
In such a case, one or two concentrated contact forces are applied to the wheel and the edge of the track link
(a) Inner surface contact (b) Edge contact
Figure 27.24 Track link and wheel contacts
Contact between a track center guide and double wheel
Each road wheel of the vehicle model offered in RecurDyn/Track_HM consists of two wheels that are rigidly connected. There are three possibilities for the track center guide and wheel interactions.
The right side plate of the wheel - the left side wall of the track center guide.
The left side plate of the wheel - the right side wall of the track center guide.
One bottom surface of wheel - the top surface of track center
In these three contact cases, a concentrated contact force is introduced at the contact surface of the double wheel, and that contact force is equal in magnitude and opposite in direction to the force acting on the track link.
(a) Side wall contact (b) Top surface contact
Figure 27.25 Center guides and double wheel contacts