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Fields at Nodes

Definition

Nodal fields (such as the displacement, the velocity, the temperature, etc.) are defined thanks to a combination of two “codes”: a Nature and a Variant.

field = Field1D(Nature, Variant)

Here is a list of some Nature identifiers :

Nature meaning
TX X-coordinate
TY Y-coordinate
TZ Z-coordinate
TO temperature
TM time

and the most basic Variant ones

Variant meaning
RE relative
AB absolute
GF1 force #1
GF2 force #2
GF3 force #3
GV first order derivative – velocity
GA second order derivative – acceleration

Examples:

The meaning of a given Field1D is deduced from the previous tables by combining the two components:

Field meaning
Field1D(TX,RE) “X-coordinate”, “relative” = displacement along X
Field1D(TX,AB) “X-coordinate”, “absolute” = initial position along X
Field1D(TX,GF1) “X-coordinate”, “force #1” = external load along X
Field1D(TY,GA) “Y-coordinate”, “acceleration” = acceleration along Y

Common Fields used in Metafor

Field1D Meaning in Metafor
(TX,AB), (TY,AB), (TZ,AB) initial positions ($x$, $y$ and $z$)
(TX,RE), (TY,RE), (TZ,RE) displacements ($x$, $y$ and $z$)
(TO,AB) initial temperature
(TO,RE) temperature variation
(TX,GV), (TY,GV), (TZ,GV) velocities ($v_x$, $v_z$ and $v_z$)
(TX,GA), (TY,GA), (TZ,GA) accelerations ($a_x$, $a_y$, $a_z$)
(TM,RE) time
(TX,GF1), (TY,GF1), (TZ,GF1) mechanical external forces / contact forces
(TX,GF2), (TY,GF2), (TZ,GF2) mechanical internal forces
(TX,GF3), (TY,GF3), (TZ,GF3) inertia forces
(TO,GF1) thermal external forces
(TO,GF2) thermal external forces
doc/user/general/locks.1420736427.txt.gz · Last modified: 2016/03/30 15:22 (external edit)

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