# 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)

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:(1)
${\text{T}}_{\text{i}}={\text{T}}_{\text{o}}+\frac{{\text{T}}_{\text{max}}{-\text{T}}_{\text{o}}}{\text{N}}\left(\text{i}-1\right),\text{i}=1,\text{N}+1$
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