*Database

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*Database

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Purpose

To specify the frequency of database output.

Theory

Refer to Database Files for further information on this feature.

Keyword Format

Block of one or two lines defining storage requirements:

TIME=Time Option

Line that follows if TIME=SELECTED is specified:

Start Time, Recording Interval

Time Option can be ALL, SELECTED, END or NONE. This keyword may occur once only in the $LOAD CASE section. It is not relevant for frequency domain dynamic analysis.

Table Input

Input:

Description

Record At:

This option allows you to specify the frequency of database output. The options include All time steps (the default), which produces database output at all solution times, Selected time steps, which produces output at a recording interval you specify, and End of Analysis, which produces output at the final solution time only. None suppresses the creation of database output.

Start Time:

The time (in seconds) at which to start output to the database file when the Selected time steps output option is invoked. By default output begins at the simulation start time.

Recording Interval:

The time interval in seconds between database outputs when the Selected time steps output option is invoked.

Notes

(a)Database output is desirable in the vast majority of cases. However, the keyword/table inputs detailed above are optional and so may be inadvertently overlooked. In such circumstances, Flexcom creates a default database based on the analysis type...

Static and quasi-static analyses – database output produced at the final solution time only (equivalent to the End of Analysis option)

Dynamic analyses – database output produced at certain time steps only (equivalent to the Selected time steps option). The Recording Interval is equal to the solution time step in a fixed time step analysis, and the maximum time step in a variable time step analysis. The Start Time is equal to the solution start time.