RANDT1

Bulk Data Entry Defines time lag constants for use in random analysis autocorrelation function computation.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
RANDT1 SID N T0 TMAX

Example

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
RANDT1 5 10 3.2 9.6

Definitions

Field Contents SI Unit Example
SID Random analysis set identification number.

(Integer > 0)

N Number of time lag intervals.

(Integer > 0)

TO Starting time lag.

(Real ≥ 0.0)

TMAX Maximum time lag.

(Real > TO)

Comments

  1. At least one RANDPS entry must be present with the same set identification number.
  2. The time lags defined on this entry are given by:
    T i = T o + T max T o N ( i 1 ) , i = 1 , N + 1
  3. Similar to RANDPS Bulk Data Entries, the RANDT1 Bulk Data Entries can be referenced either by:
    • The RANDOM Subcase or Case Control Entry.
    • A SET I/O Options Entry that is then referenced by a RANDOM Case Control Entry. 4
    • A SET Bulk Data Entry with TYPE=MODE that is then referenced by a RANDOM Case Control Entry. 4
  4. If a SET entry is used to reference multiple RANDPS data, then the RANDT1 entry with the smallest ID from set of referenced entries will be selected for the analysis.
    For example:
    RANDOM=2
    SET 2 = 5,6,7
    BEGIN BULK
    $
    RANDPS,5
    RANDPS,6
    RANDPS,7
    $
    RANDT1,5 → This RANDT1 entry is selected for analysis.
    RANDT1,6