Multi-Linear Velocity Dependent Friction

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This command is used to construct a multi-linear velocity dependent friction model object. The friction versus velocity relationship is given by a multi-linear curve that is define by a set of points. The slope given by the last two specified points on the positive velocity axis is extrapolated to infinite positive velocities. The number of provided velocity points needs to be equal to the number of provided friction points.

frictionModel VelDepMultiLinear $matTag -vel $velocityPoints -frn $frictionPoints

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$frnTag	unique friction model object tag
$velocityPoints	array of velocity points along friction-velocity curve
$frictionPoints	array of friction points along friction-velocity curve

EXAMPLE:

frictionModel VelDepMultiLinear 1 -vel 0.0 0.1 2.0 8.0 10.0 -frn 0.163 0.085 0.150 0.163 0.163

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Code Developed by: Andreas Schellenberg, University of California, Berkeley.