| BID |
PID or
DID (Integer > 0; no default). This field can
contain the PSHELL or PCOMP
property ID of the elements or the desvar number of any set of
DVGRIDs present in the deck to be optimized
for topography. If field 6 contains data, OptiStruct will assume that the
BEAD card references a property, otherwise it
assumes that the card references a DESVAR and its
corresponding DVGRIDs. |
| MW |
Bead minimum width (Real >
0.0; no default). This parameter controls the width of the beads in
the model [recommended value between 1.5 and 2.5 times the average
element width]. 1 |
| ANG |
Draw angle in degrees (1.0
< Real < 89.0; no default). This parameter controls the angle
of the sides of the beads [recommended value between 60 and 75
degrees]. 1 |
| BF |
Buffer zone ('yes' or
'no'; default = 'yes'). This parameter will establish a buffer zone
between elements in the design domain and elements outside the
design domain. |
| HGT |
Draw height: (Real > 0.0;
no default). This parameter sets the maximum height of the beads to
be drawn. This field is only valid if a PID is
declared in field 2. |
| norm/XD,YD,ZD |
Draw direction ('norm' in
field 7 or Real in all three fields; default = 'norm'). If field 7
is 'norm', the shape variables will be created in the normal
directions of the elements. If all the fields are real, the shape
variable will be created in the direction specified by the xyz
vector defined by fields 7, 8, and 9. The X, Y, and Z values are in
the basic coordinate system. This field is only valid if a PID is
declared in field 2. |
| SKIP |
Boundary skip ('both',
'bc', 'spc', 'load', or 'none'; default = 'both'). This parameter
tells OptiStruct to leave certain nodes
out of the design domain. If 'none', all nodes attached to elements
whose PID was specified in field 2 will be a part
of the shape variables. If 'bc' or 'spc', any nodes which have
SPC or SPC1 declarations
are omitted from the design domain. If 'load', any nodes which have
FORCE, FORCE1,
MOMENT, MOMENT1, or
SPCD declarations are omitted from the design
domain. If 'both', nodes with either 'spc' or 'load' declarations
are omitted from the design domain. This field is only valid if a
PID is declared in field 2. |
| FID/XF,YF,ZF |
Direction of first vector
for variable pattern grouping (Real in all three fields or Integer
in field 12; default = blank). These fields define an xyz vector
which determines how grids are grouped into variables. The X, Y, and
Z values are in the global coordinate system. You may put a grid ID
in field 12 to define the first vector. This vector goes from the
anchor point to this grid. If all fields are blank and field 20 is
not blank or zero, OptiStruct gives an
error. |
| AID/XA,YA,ZA |
Variable grouping pattern
anchor point (Real in all three fields or integer in field 15;
default = blank). These fields define a point which determines how
grids are grouped into variables. The X, Y, and Z values are in the
global coordinate system. You may put a grid ID in field 15 to
define the anchor point. |
| LB |
Lower bound on variables
controlling grid movement (Real < UB, default = 0.0). This sets
the lower bound on grid movement equal to LB*HGT. |
| UB |
Upper bound on variables
controlling grid movement (Real > LB, default = 1.0). This sets the
upper bound on grid movement equal to UB*HGT. |
| TYP |
Type of variable grouping
pattern. (Integer ≥ 0, default = 0) Required if any symmetry or
variable pattern grouping is desired. If zero or blank, anchor node,
first vector, and second vector definitions are ignored. If less
than 20, second vector definition is ignored. |
| SID/XS,YS,ZS |
Direction used to
determine second vector for variable pattern grouping (Real in all
three fields or Integer in field 22; default = blank). These fields
define an xyz vector which, when combined with the first vector,
form a plane. The second vector is calculated to lie in that plane
and is perpendicular to the first vector. The second vector is
sometimes required to determine how grids are grouped into
variables. The X, Y, and Z values are in the global coordinate
system. You may put a grid ID in field 22 to define the second
vector. This vector goes from the anchor point to this grid. If all
fields are blank and field 20 contains a value of 20 or higher,
OptiStruct gives an error. |
| UCYC |
Number of cyclical
repetitions for cyclical symmetry (Integer ≥ 0 or blank; default =
0). This field defines the number of radial "wedges" for cyclical
symmetry. The angle of each wedge is computed as 360.0 /
UCYC. |