Uniform Excitation Pattern: Difference between revisions
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{| style="background:yellow; color:black; width:800px" | {| style="background:yellow; color:black; width:800px" | ||
| ''' pattern UniformExcitation $patternTag $dir -accel $tsTag <-vel0 $ | | ''' pattern UniformExcitation $patternTag $dir -accel $tsTag <-vel0 $vel0> <-fact $cFactor>''' | ||
|} | |} | ||
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| style="width:150px" | '''$patternTag ''' || unique tag among load patterns | | style="width:150px" | '''$patternTag ''' || unique tag among load patterns | ||
|- | |- | ||
| '''$dir''' || direction ground motion acts | | '''$dir''' || direction in which ground motion acts | ||
|- | |||
| || 1 - corresponds to translation along the global X axis | |||
|- | |||
| || 2 - corresponds to translation along the global Y axis | |||
|- | |||
| || 3 - corresponds to translation along the global Z axis | |||
|- | |||
| || 4 - corresponds to rotation about the global X axis | |||
|- | |||
| || 5 - corresponds to rotation about the global Y axis | |||
|- | |||
| || 6 - corresponds to rotation about the global Z axis | |||
|- | |- | ||
| '''$tsTag''' || tag of the TimeSeries series defining the acceleration history. | | '''$tsTag''' || tag of the TimeSeries series defining the acceleration history. | ||
|- | |- | ||
| '''vel0''' || | | '''$vel0''' || the initial velocity (optional, default=0.0) | ||
|- | |||
| '''$cFactor''' || constant factor (optional, default=1.0) | |||
|} | |} | ||
Latest revision as of 18:33, 15 March 2016
- Command_Manual
- Tcl Commands
- Modeling_Commands
- model
- uniaxialMaterial
- ndMaterial
- frictionModel
- section
- geometricTransf
- element
- node
- sp commands
- mp commands
- timeSeries
- pattern
- mass
- block commands
- region
- rayleigh
- Analysis Commands
- Output Commands
- Misc Commands
- DataBase Commands
The UniformExcitation pattern allows the user to apply a uniform excitation to a model acting in a certain direction. The command is as follows:
| pattern UniformExcitation $patternTag $dir -accel $tsTag <-vel0 $vel0> <-fact $cFactor> |
| $patternTag | unique tag among load patterns |
| $dir | direction in which ground motion acts |
| 1 - corresponds to translation along the global X axis | |
| 2 - corresponds to translation along the global Y axis | |
| 3 - corresponds to translation along the global Z axis | |
| 4 - corresponds to rotation about the global X axis | |
| 5 - corresponds to rotation about the global Y axis | |
| 6 - corresponds to rotation about the global Z axis | |
| $tsTag | tag of the TimeSeries series defining the acceleration history. |
| $vel0 | the initial velocity (optional, default=0.0) |
| $cFactor | constant factor (optional, default=1.0) |
NOTES:
- The responses obtained from the nodes for this type of excitation are RELATIVE values, and not the absolute values obtained from a multi-support case.
Code Developed by: fmk