Rotational Bearing Friction
Coulomb friction in bearings
Description
Connections
Parameters
Modelica Standard Library
The Rotational Bearing Friction (or Bearing Friction) component models Coulomb friction in bearings, i.e., a frictional torque acting between a flange and the housing.
Torque Table
The τpos parameter is a two-dimensional table (array) that specifies the torque at given angular velocities. Each row has the form w,τ⁡w. The first column must be ordered, 0≤w1<w2<⋯<wm. To add rows, right-click on the value and select Edit Matrix Dimension. Only linear interpolation is supported.
Name
Modelica ID
flangea
Flange of left shaft
flange_a
flangeb
Flange of right shaft
flange_b
support
Conditional Support Flange
heatPort
Optional heat port
General Parameters
Default
Units
τpos
0.,1.
1
Positive sliding friction characteristic
tau_pos
peak
peak⁢τpos1,2 is the maximum friction torque at ω=0
Use Heat Port
false
True (checked) means heat port is enabled
useHeatPort
Use Support Flange
True (checked) enables the support flange
useSupport
Advanced Parameters
ωsmall
1·1010
rads
The velocity reinitializes when ω≤ωsmall
w_small
Klocked
0
Gain driving the relative motion between the friction elements to 0 when locked. This parameter should only be non-zero when using the model with fixed-step integration.
K_locked
The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.
See Also
1-D Mechanical Overview
Rotational Bearings and Gears
Download Help Document