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Create/Modify Wheel and Tire

Ribbon menu → Forces tab → Special Forces container → Create/Modify Wheel and Tire

Adds a wheel and tire assembly to your model. Learn about Defining Tires in Adams View.

For the option:	Do the following:
Name	Enter the name of the wheel-tire assembly to create or modify.
Side (left,right)	Select the side of the vehicle on which this wheel-tire assembly will be located. Some road use this information to apply different inputs to left and right tires (for example, the 2D stochastic (random) road). If you are modeling a motorcycle, we recommend selecting left for both the front and rear wheel tires.
CM Offset	Optionally, enter the wheel center of mass offset. This is the distance the wheel center of mass is offset along the wheel-spin (z) axis from the wheel center.
Mass	Enter the mass of wheel (tire and rim). Typically, the mass of the wheel and tire are lumped together. If you select a property file for PAC2002 with belt dynamics switched on or FTire, the mass and inertia of the wheel will be corrected with the tire belt mass and inertia. Note: If the FTire tire property file needs pre-processing the modification to FTire may take a short while. The re-distribution of the mass and inertia can be switched off by setting the environment variable MSC_ADAMS_TIRE_DIS_M_AND_I=NO.
Ixx Iyy	Enter the moment of inertia about the x- and y-axes (camber and steer axes) of the wheel (tire and rim). Enter one value because Ixx is assumed to equal Iyy for wheel-tire. If you select a property file for PAC2002 with belt dynamics switched on or FTire, the mass and inertia of the wheel will be corrected with the tire belt mass and inertia. Note: If the FTire tire property file needs pre-processing the modification to FTire may take a short while. The re-distribution of the mass and inertia can be switched off by setting the environment variable MSC_ADAMS_TIRE_DIS_M_AND_I=NO.
Izz	Enter the moment of inertia about the wheel-tire's z- (Spin) axis of the wheel (tire and rim). Enter one value because Ixx is assumed to equal Iyy for wheel-tire. If you select a property file for PAC2002 with belt dynamics switched on or FTire, the mass and inertia of the wheel will be corrected with the tire belt mass and inertia. Note: If the FTire tire property file needs pre-processing the modification to FTire may take a short while. The re-distribution of the mass and inertia can be switched off by setting the environment variable MSC_ADAMS_TIRE_DIS_M_AND_I=NO.
Wheel Center offset (optional)	Enter the offset of the wheel center geometry along the z-axis of the wheel part.
Tire Property File	Specify the property file containing the data for the tire. When the dialog box is first displayed, the default filename mdi_0001.tir appears in the text box. Use the View File button to view the contents of the tire property file. Tips on Entering File Names in Text Boxes.
Wheel Initial Velocities	Select either: ■Standard: For just defining the longitudinal and spin velocity. or ■Advanced: For being able to define the initial velocities in all directions.
If you selected Standard, the following options appears:
Longitudinal Velocity	(Optional) Enter the initial longitudinal velocity of the wheel-tire. The longitudinal velocity is velocity along the X axis of the wheel-tire.
Spin Velocity	(Optional) Enter the initial spin velocity of the wheel-tire. The spin velocity is the rotational velocity of the wheel-tire about its z-axis in negative direction. A good approximation of the initial spin velocity is the longitudinal velocity divided by the unloaded radius of the tire: Spin Velocity = Longitudinal Velocity / Unloaded Radius
If you selected Advanced, the following options appears:
Translational velocity along	(Optional) Select the reference (VM) marker for the translational initial velocities: ■Ground, or select a specific marker Check the initial velocity axis to be used and specify the initial velocity value: ■X axis ■Y axis ■Z axis
Angular velocity about	(Optional) Select the reference (WM) marker for the angular initial velocities: ■Wheel Center Marker (CM), or select a specific marker Check the initial velocity axis to be used and specify the initial velocity value: ■X axis ■Y axis ■Z axis
Road	Enter the name of an existing road property file. To create a road, right-click the text box, point to vpg_road, and then select Create. The Create/Modify Road dialog box appears. The road determines the input your tire sees—rough or smooth, wet or dry, and so on.
Location and Orientation
Location	Enter the location of the wheel center.
Orient using	Select either Euler Angles or Direction Vectors.
Euler Angles	Enter the euler angles (body 3,1,3 angles) to orient the wheel-tire assembly.
X Vector	Enter the x-direction vector. The x- and z- direction vectors determine the x,y,z orientation of the wheel-tire in the following way: ■Z = z-vector / \| z-vector \| ■Y = z-vector x x-vector / \| z vector x x-vector \| ■X = Y x Z / \| Y x Z \| For more information on XP-ZP method, see the argument XP in the MARKER statement.
Z Vector	Enter the z-direction vector (see X Vector above).
	Select to add any comments about the variable to help you manage and identify it. See Comments.
	Select to display the contents of the road or tire property file in the Information window. This helps you determine what kind of road the file models.