Minimum Unbalanced Displacement Norm

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This command is used to construct a StaticIntegrator object of type MinUnbalDispNorm.

integrator MinUnbalDispNorm $dlambda1 <$Jd $minLambda $maxLambda>

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$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)

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EXAMPLE:

integrator MinUnbalDispNorm 0.1;

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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>

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Code Developed by: fmk