Clutch Forces
This component represents contact forces in a clutch component. It models normal contact forces, as well as friction forces.
Learn about clutch forces:
Creating or Modifying Clutch Forces
To create or modify clutch forces:
1. From the Driveline Components menu, point to Clutch Forces, and then select New/Modify.
3. Select OK.
About Clutch Forces
Contact forces are modeled using a property file which stores the cushion characteristic. The behavior is very similar to a bumpstop element: no force in one direction, and force in the other one when the distance between two parts (for example, flywheel and pressure plate) is smaller than a specified clearance. The property file is stored in a designated directory of the database named <db_name>/clutch_forces.tbl/*.clu.
Adams Driveline models friction forces by multiplying contact forces with a friction coefficient and an effective radius that you specify.
The friction coefficient is defined as a function of the relative angular velocity between the two parts. You can also take into account both the static and dynamic friction coefficient.
The following figure shows a typical friction versus relative slip.
Using the create/modify dialog box, you can observe how the friction function changes by changing parameters such as the static and dynamic friction coefficient.
In Standard Interface, you can vary values for the following:
■Property file
■Impact length
■Static friction coefficient
■Dynamic friction coefficient
■Static velocity
■Dynamic velocity
■Effective friction radius
Example Clutch-Force Property File
$--------------------------------------------------MDI_HEADER
[MDI_HEADER]
FILE_TYPE = 'clu'
FILE_VERSION = 4.0
FILE_FORMAT = 'ASCII'
$--------------------------------------------------UNITS
[UNITS]
LENGTH = 'mm'
ANGLE = 'degrees'
FORCE = 'newton'
MASS = 'kg'
TIME = 'second'
$--------------------------------------------------DAMPING
[DAMPING]
DAMPING = 10
$--------------------------------------------------CURVE
[CLUTCH_FORCE]
{ disp force}
0.0 0.0
3.50 40000.0
5.50 90000.0
7.60 130500.0
12.10 180000.0
15.50 270000.0
17.56 297900.0
40.635 378000.0