# Output Messages

```
CYCLE TIME TIME-STEP ELEMENT ERROR I-ENERGY K-ENERGY T K-ENERGY R EXT-W
-------
2 2.380 0.4802 SHELL 0.0% 5.117 0.000 0.000 5.117
--SUPPLEMENTARY CONTACT STIFFNESS MATRIX IS CREATED--
WITH DIM. : ND = 141 NZ = 1050 NB_MAX = 15
NL_ITERATION= 0 INITIAL RESIDUAL NORM= 0.5913E+01 0.4613E+04 0.1600E+05
--STIFFNESS MATRIX IS REFORMED --
--SUPPLEMENTARY CONTACT STIFFNESS MATRIX IS CREATED--
WITH DIM. : ND = 150 NZ = 1059 NB_MAX = 15
NL_ITERATION= 1 RELATIVE RESIDUAL NORM= 0.1000E+01 0.8593E-01 0.5005E-01
--SUPPLEMENTARY CONTACT STIFFNESS MATRIX IS CREATED--
WITH DIM. : ND = 156 NZ = 1101 NB_MAX = 15
CONVERGED WITH 2 ITERATIONS, |du|/|u|,|r|/|r0|,|dE|/|E|= 0.5915 0.4747E-01 0.1166
```

Each iteration contains a printout of the normalized (L2 Norm) initial values (iteration
zero) or relative one of displacement, force residual and energy. So
`|du|/|u|`

is relative residual in displacement,
`|r|/|r0|`

is relative residual in force and
`|dE|/|E|`

is relative residual in energy.## Stiffness Matrix Setup

At the start of every computation, the following message is
printed:

*--------- STIFFNESS MATRIX SETUP ---------* SYMBOLIC DIM : ND = 164202 NZ = 6047160 NB_MAX = 96 FINAL DIM : ND = 154605 NZ = 5652417 NB_MAX = 96

Where,

`ND`

- Dimension of the stiffness matrix (number of DOFs)
`NZ`

- Number of non-zero values of the strict triangular matrix (only
`ND+NZ`

values are stored due to the symmetry of matrix) `NB_MAX`

- Maximum number of connected nodes in the model

Radioss eliminates all dependent nodes (this process is called
condensation) before resolution, and so the
`SYMBOLIC`

and `FINAL`

dimensions correspond
respectively to the matrix dimension before and after condensation.

If contact is taken into account, the stiffness matrix of penalty spring is stored independently
and information on this is printed (if /IMPL/PRINT/NONLIN/n is
defined) once contacts are
detected:

--SUPPLEMENTARY CONTACT STIFFNESS MATRIX IS CREATED-- WITH DIM. : ND = 42 NZ = 42 NB_MAX = 16

Note: Only information of the final (after condensation) matrix information is printed
out.

In the Radioss SPMD version, the sub-matrix of the main stiffness
matrix stored on each machine is printed; and for the supplementary contact matrix,
only the total final one is printed.

- CPU information If the keyword /MON/ON is defined in the Radioss Engine input file (_0001.rad), some detailed information regarding CPU processing time information for the implicit scheme is printed in the .out file:
`#PROC [K]SETUP [M]SETUP IMPL.SOLV IMPL.TOTAL 1 .2484E+01 .1528E+02 .6742E+02 .8520E+02 #PROC CONT.SORT CONT. F ELEMENT MAT KIN.COND. INTEGR. I/O TASK0 ASSEMB. RESOL 1 .0000E+00 .0000E+00 .1875 .3125E-01 .0000 .0000E+00 .2188 .2188 .0000 .8561E+02 ---------- ELAPSED TIME : 89.32 s`

Where,

`[K]`

- Main stiffness matrix
`[M]`

- Pre-conditioning matrix (if iterative solver is used)
`IMPL.SOLV`

- For the resolution of $\left\{x\right\}=\left[K\right]-1\left\{b\right\}$

The numerical values represent time.

## Output Solving for each Iteration (/IMPL/SOLV and /IMPL/NONLIN/SOLVINFO)

Output global solve information at each solving iteration. This command creates three additional
files:

- Filename_implicit.info
- For largest residuals (force and moment), largest displacement and rotation increments and largest corrections at each iteration and each increment.
- Filename_implicit.hist
- Contains all data for plotting purposes in Altair HyperWorks.
- Filename_implicit.tpl
- A
`tpl`

script for plotting in Altair HyperWorks the data from .hist file.