Krylov-Newton

This command is used to construct a KrylovNewton algorithm object which uses a Krylov subspace accelerator to accelerate the convergence of the modified newton method. The command is of the following form:

algorithm KrylovNewton < -iterate $tangIter >
        < -increment $tangIncr > < -maxDim $maxDim >

tangIter	tangent to iterate on, options are current, initial, noTangent. default is current.
tangIncr	tangent to increment on, options are current, initial, noTangent. default is current
maxDim	max number of iterations until the tangent is reformed and the acceleration restarts (default = 3).

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NOTES:

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References

Scott, M.H. and G.L. Fenves. “A Krylov Subspace Accelerated Newton Algorithm: Application to Dynamic Progressive Collapse Simulation of Frames.” Journal of Structural Engineering, 136(5), May 2010. DOI

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Code Developed by: Michael Scott, Oregon State University