Multi-Linear Velocity Dependent Friction: Difference between revisions

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{{CommandManualMenu}}
{{CommandManualMenu}}


This command is used to construct a multi-linear velocity dependent friction model object.
This command is used to construct a VelDepMultiLinear friction model object.
The friction versus velocity relationship is given by a multi-linear curve that is define by a set of points.
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.
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.
The number of provided velocity points needs to be equal to the number of provided friction points.


{|  
{|  
| style="background:yellow; color:black; width:800px" | '''frictionModel VelDepMultiLinear $matTag -vel $velocityPoints -frn $frictionPoints'''
| style="background:lime; color:black; width:800px" | '''frictionModel VelDepMultiLinear $frnTag -vel $velocityPoints -frn $frictionPoints'''
|}
|}


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[[File:ElasticMultiLinear.png]]
[[File:VelDepMultiLinear.png|500px]]
 


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EXAMPLE:
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
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
----
RELATED TO:
* [http://opensees.berkeley.edu/wiki/index.php/Flat_Slider_Bearing_Element Flat Slider Bearing Element]
* [http://opensees.berkeley.edu/wiki/index.php/Single_Friction_Pendulum_Bearing_Element Single Friction Pendulum Bearing Element]
* [http://opensees.berkeley.edu/wiki/index.php/Triple_Friction_Pendulum_Element Triple Friction Pendulum Bearing Element]




Latest revision as of 20:07, 18 September 2014



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
$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


RELATED TO:


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

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