Flexcom > Data Inputs > $SHEAR7 > *STRESS TIME HISTORY OUTPUT

Purpose

To specify various parameters relating the stress time history output file (*.s7sth). This keyword is relevant for Shear7 V4.11 and later versions.

Theory

Refer to SHEAR7 Data Specification for further information on this feature. For more information, refer to the Shear7 User Guide which is available for download from the Shear7 Support web page.

Keyword Format

Several optional lines relating to the stress time history output file :

[TOTAL_TIME=Total Time]

[SAMPLE_PERIOD=Sample Period]

[NODE_RANGES=Node Ranges]

[RANDOM_SEED=Random Seed]

Node Ranges can be specified as a series of nodes separated by commas (with no spaces), or as ranges, so 1:5 would be the same as 1,2,3,4,5. Here is a sample specification-> NODE_RANGES=1:5,251,1884. If Node Ranges are not specified, Shear7 will outputs results for all nodes, and will issue a a warning saying that this could result in a very large .s7sth file.

Table Input

Input:	Description
Total Time:	The total time required for stress output. If not specified, Shear7 will use a total time which ensures there are at least 10 periods for the mode with the longest period.
Sample Period:	The sample time for stress output. If not specified, Shear7 will use a sample time which ensures at least 10 samples per period for the mode with the shortest period.
Node Ranges:	A list of nodes used to to calculate and output the time histories. This can be specified as a series of nodes separated by commas (with no spaces). They can also be specified as ranges so 1:5 would be the same as 1,2,3,4,5. Here is a sample specification-> 1:5,251,1884. If not specified, Shear7 will outputs results for all nodes, and will issue a a warning saying that this could result in a very large .s7sth file.
Random Seed:	For each repeat period the order of the frequencies gets randomly allocated. A seed number can be specified to ensure the ordering is repeatable.