Sidebar
This is an old revision of the document!
Table of Contents
Preprocessor
Preprocessing data for Lagamine program.
This page contains a description of the data to be indicated in the *.lag file for the Prepro.
Title
| Format (9A8,I3) | |
|---|---|
| Title(9) | Title, in 72 characters |
| I99999 | Big mesh index: = 1 if NUMNP (total number of nodal points)>99999 = 0 else |
Control data of the program
The control data is defined in 4 lines (in exponent, column on which the variable must be fit in with).
| 1st line (14I5) or (2I5, I10, I5, I10, 10I5) if I99999=1 | |
|---|---|
| NTANA$^5$ | Type of analysis (see here) |
| IANA$^{10}$ | Type of problem: |
| =1 Plane stress state ($EP\sigma$) | |
| =2 Plane strain state ($EP\varepsilon$) | |
| =3 Axisymmetric state ($axi$) | |
| =4 3D state ($3D$) | |
| =5 Generalized plane state ($EPG$) | |
Remark on NTANA
In general, a node has 3 DOF displacements and 1 DOF temperature. In the case of 3D shell elements, it has 3 DOF displacements and 3 DOF rotations. The variable NTANA allows the program to decide which is the maximum number of nodal DOF potentially useful for a given type of analysis (dimension NDOFN, classed as NSPAC, space dimension). It also allows to define the active DOF (i.e. those which can produce an equation) and the passive ones (which do not produce equations).
