DDVAL – Discrete Design Variable Values
Define real, discrete design variable values for discrete variable optimization.
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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DDVAL |
ID |
DVAL1 |
DVAL2 |
DVAL3 |
DVAL4 |
DVAL5 |
DVAL6 |
DVAL7 |
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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DDVAL |
ID |
DVAL1 |
"THRU" |
DVAL |
"BY" |
INC |
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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.
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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DVAL8 |
DVAL9 |
DVAL10 |
DVAL11 |
-etc.- |
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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DVAL8 |
"THRU" |
DVAL9 |
"BY" |
INC |
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(1) |
(2) |
(3) |
(4) |
(5) |
(6) |
(7) |
(8) |
(9) |
(10) |
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DDVAL |
110 |
0.1 |
0.2 |
0.3 |
0.5 |
0.6 |
0.4 |
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.7 |
thru |
1.0 |
by |
0.05 |
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1.5 |
20 |
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Field |
Contents |
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ID |
Unique discrete value set identification number. (Integer > 0) |
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DVALi |
Discrete values. (Real or "THRU" or "BY") |
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INC |
Discrete value increment. (Real) |
DDVAL entries must be referenced by a DESVAR entry in the DDVAL field.
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 though 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 DVALi sequence can be random.
The format DVALi "THRU" DVALj "BY" INC defines a list of discrete values, e.g., 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.
Go To
Guidelines for Bulk Data Entries
Alphabetical List of Bulk Data Entries