Multi-Linear Velocity Dependent Friction

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This command is used to construct a VelDepMultiLinear friction model object. The friction-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. Velocity and friction points need to be equal or larger than zero (no negative values should be defined). The number of provided velocity points needs to be equal to the number of provided friction points.

frictionModel VelDepMultiLinear $frnTag -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

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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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RELATED TO:

• Flat Slider Bearing Element
• Single Friction Pendulum Bearing Element
• Triple Friction Pendulum Bearing Element

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