Minimum Unbalanced Displacement Norm
This command is used to construct a StaticIntegrator object of type MinUnbalDispNorm.
integrator MinUnbalDispNorm $dlambda1 <$Jd $minLambda
$maxLambda>
|
first load increment (pseudo-time step) at the first iteration in the next invocation of the analysis command. |
|
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) |
Examples
integrator MinUnbalDispNorm 0.1;
Theory
The load increment at iteration i, \(d\lambda_{1,i}\) , is related to the load increment at (i-1), \(d\lambda_{1,i-1}\), and the number of iterations at (i-1), \(J_{i-1}\), by the following:
-
\[d\lambda_{1,i} = d\lambda_{1,i-1}\frac{J_d}{J_{i-1}}\]
Code Developed by: fmk