Convergence is achieved when the relative unbalance is less than or equal to 1.0. Basically, the Convergence The convergence tolerance at any step is computed by multiplying as the product of relative convergence tolerance (1.0e1e-4) times and the current magnitude of the load vector, given as:
- Tol = relTol * max( |
...
- internalForceVector
...
- |,
...
- | externalForceVector |
...
- )
The unbalance Unbalance error is calculated as:
- Err =
...
- | internalForceVector - externalForceVector |
...
Convergence is achieved if when Err <= Tol, or when:relErr
- RelErr = Err/Tol <= 1.0
It is relErr that is reported on the screen and RelErr is the value for relative unbalance, as reported in the log file.
See Also
- Convergence tolerance article