Translational Friction
Smooth friction between sliding bodies
Description
Variables
Connections
Parameters
Modelica Standard Library
The Translational Friction component represents friction in contact between sliding bodies. The friction is a smooth function of the relative velocity of the two flanges. This friction approximates the sum of Stribeck friction, Coulomb friction, and damping.
F=d⁢vrel+tanh⁡vrelv0⁢fc+fs−fc⁢exp⁡−vrelvsn
fa=−fb=−F
srel=sb−sa
vrel=s.rel
Name
Units
Modelica ID
srel
m
relative distance
s_rel
vrel
ms
relative velocity, flange A to flange B
v_rel
flangea
Left flange of compliant 1-dim. translational component
flange_a
flangeb
Right flange of compliant 1-dim. translational component
flange_b
Default
d
0
N⁢sm
Viscous friction coefficient
fc
20
N
Coulomb friction force
fs
25
Maximum sliding friction force
n
1
Decay exponent
vs
0.1
Stribeck sliding velocity coefficient
v0
0.01
Smoothing function scale, i.e. tanh(v_rel/v_0)
v_0
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
Translational Friction and Stops
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