Uniform Excitation Pattern
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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 global X axis | |
| 2 - corresponds to global Y axis | |
| 3 - corresponds to 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