ModifiedNewtonAlgorithm

ModifiedNewtonAlgorithm(initial: bool = False, factor_once: bool = False)

Bases: Algorithm

Modified Newton-Raphson nonlinear solution algorithm.

ModifiedNewtonAlgorithm solves nonlinear equilibrium equations by reforming the tangent stiffness matrix only at the beginning of each analysis step, reducing computational cost compared to the standard Newton-Raphson method.

Tcl form

algorithm ModifiedNewton [-initial] [-factoronce]

Example

from femora.core.model import Model

model = Model()
algo = model.analysis.algorithm.modifiednewton(factor_once=True)

Create a Modified Newton solution algorithm.

Parameters:

Name	Type	Description	Default
`initial`	`bool`	If True, uses initial stiffness iterations.	`False`
`factor_once`	`bool`	If True, factorizes the stiffness matrix only once.	`False`