
Institut für
Leichtbau und StrukturBiomechanik
INTRANET 

ARIGEN INPUT FILES: ARRANGEMENT RECORD
This documentation pertains to ARIGEN Rev. A2LI/012.
An ARIGEN arrangement record contains two lines, the first of which
consists of the keyword
*ARRANGEMENT
In the second line the type of arrangement must be specified.
At present the following arrangements are available:
 PERIODIC:
A periodic arrangement of inhomogeneities is generated in which the box
boundaries intersect the inhomogeneities at any position allowed by the
minimum distances specified; such arrangements require the use of
periodicity boundary conditions.
 CCPERIODIC:
A periodic arrangement of inhomogeneities is generated in which the box
boundaries intersect the inhomogeneities only through their centers; such
arrangements allow using symmetry or periodicity boundary conditions.
 HARDBOX:
A nonperiodic arrangement of inhomogeneities is generated such that no
inhomogeneity penetrates the box; in addition, minimum distances are
enforced.
 WINDOW:
A nonperiodic window arrangement of inhomogeneities is generated such that
inhomogeneity penetrating the box are cut off; in addition, minimum
distances are enforced. Window arrangements are available in 2D only.
 EPERIODIC, arrasp:
An elliptic, periodic arrangement of inhomogeneities is generated in which
the box boundaries intersect the inhomogeneities at any position allowed
by the minimum distances specified; such arrangements require the use of
periodicity boundary conditions.
The aspect ratio of the "safety ellipses" is provided by
arrasp; if this is greater than
unity, the major axes of the ellipses correspond to the yaxis,
otherwise to the xaxis.
The EPERIODIC option is in test,
only RSI is available for generation.
If no arrangement record is given, ARIGEN will produce a periodic
arrangement of inhomogeneities.