Bulk Data Entry Define real, discrete design variable values for
discrete variable optimization or to define relative rotor spin rates in rotor
dynamics.
Format
| (1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
| DDVAL |
ID |
DVAL1 |
DVAL2 |
DVAL3 |
DVAL4 |
DVAL5 |
DVAL6 |
DVAL7 |
|
Alternate Format
| (1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
| DDVAL |
ID |
DVAL1 |
"THRU" |
DVAL |
"BY" |
INC |
|
|
|
The continuation entry formats (shown below) may be used more than once, and in any
order. They may also be used with either format above.
Continuation Entry Format 1
| (1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
| |
DVAL8 |
DVAL9 |
DVAL10 |
DVAL11 |
etc. |
|
|
|
|
Continuation Entry Format 2
| (1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
| |
DVAL8 |
"THRU" |
DVAL9 |
"BY" |
INC |
|
|
|
|
Example
| (1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
| DDVAL |
110 |
0.1 |
0.2 |
0.3 |
0.5 |
0.6 |
0.4 |
|
|
| |
.7 |
thru |
1.0 |
by |
0.05 |
|
|
|
|
| |
1.5 |
20 |
|
|
|
|
|
|
|
Definitions
| Field |
Contents |
SI Unit Example |
| ID |
Unique discrete value set
identification number. (Integer > 0)
|
|
| DVALi |
Discrete values. The
DVALi sequence can be random. (Real or
"THRU" or
"BY")
|
|
| INC |
Discrete value
increment. (Real)
|
|
Comments
- DDVAL entries must be
referenced by:
- the DDVAL field of a DESVAR
- the SPTID field of a RSPINR
Bulk Data Entry
- If the bounds on DESVAR
cards (either XLB and/or XUB) are wider than
those given by the discrete list of values on the corresponding
DDVAL entry, XLB and/or
XUB on DESVAR will be replaced by the
minimum and maximum discrete values.
- Trailing fields on a
DDVAL record can be left blank if the next record is of type
DVALi
"THRU"
DVALj
"BY"
INC. Also, fields 7 through 9 must be blank when the type
DVALi
"THRU"
DVALj
"BY"
INC is used in fields 2 through 6. Fields 8 through 9 must be
blank when the type DVALi
"THRU"
DVALj
"BY"
INC is used in fields 3 through 7 for the first record. Embedded
blanks are not permitted in other cases.
- The format DVALi
"THRU"
DVALj
"BY"
INC defines a list of discrete values, for example,
DVALi, DVALi+INC,
DVALi+2.0*INC, …,
DVALj. The last discrete DVALj is always
included, even if the range is not evenly divisible by INC.
- This card is represented as a discrete
design variable in HyperMesh.