Minimum Unbalanced Displacement Norm: Difference between revisions
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| style="width:150px" | '''$dlambda1 ''' || first load increment (pseudo-time step) at the first iteration in the next invocation of the [[Analysis Command|analysis]] command. | | style="width:150px" | '''$dlambda1 ''' || first load increment (pseudo-time step) at the first iteration in the next invocation of the [[Analysis Command|analysis]] command. | ||
|- | |- | ||
| $Jd || factor relating first load increment at subsequent time steps (optional, default: 1.0) | | '''$Jd''' || factor relating first load increment at subsequent time steps (optional, default: 1.0) | ||
|- | |- | ||
| $minLambda, $maxLambda || arguments used to bound the load increment (optional, default: $dLambda1 for both) | | '''$minLambda, $maxLambda''' || arguments used to bound the load increment (optional, default: $dLambda1 for both) | ||
|} | |} | ||
Latest revision as of 00:52, 31 August 2010
- 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
This command is used to construct a StaticIntegrator object of type MinUnbalDispNorm.
| integrator MinUnbalDispNorm $dlambda1 <$Jd $minLambda $maxLambda> |
| $dlambda1 | first load increment (pseudo-time step) at the first iteration in the next invocation of the analysis command. |
| $Jd | factor relating first load increment at subsequent time steps (optional, default: 1.0) |
| $minLambda, $maxLambda | arguments used to bound the load increment (optional, default: $dLambda1 for both) |
EXAMPLE:
integrator MinUnbalDispNorm 0.1;
THEORY:
The load increment at iteration i, <math>d\lambda_{1,i}</math>, is related to the load increment at (i-1), <math>d\lambda_{1,i-1}</math>, and the number of iterations at (i-1), <math>J_{i-1}</math>, by the following:
- <math>d\lambda_{1,i} = d\lambda_{1,i-1}\frac{J_d}{J_{i-1}}</math>
Code Developed by: fmk