3.2.6.4. Arc-Length Control

integrator ArcLength $s $alpha < -det > < -exp $exp > < -iterScale $iterScale >

This command is used to construct an ArcLength integrator object. In an analysis step with ArcLength we seek to determine the time step that will result in our constraint equation being satisfied.

3.2.6.4.1. Examples

import sees.openseespy as ops
model = ops.Model(ndm=2, ndf=3)

...

model.integrator("ArcLength", 1, det=True, exp=0.5)

integrator ArcLength 1 -det -exp 0.5

integrator ArcLength 1 -exp 0.5