The HOTS data record allows you to start a time domain analysis from a particular time in a previous time history analysis. The program will extract the positions and velocities of the structures at that time from the previous results and use them as the start positions and velocities for the hot-start run. It is advised that you create a separate data file for each hot-start run, and consequently, the *.POS and *.RES files from the previous run should be copied to the new name.
When the HOTS data record is used there may not always be complete continuity between the two runs.
The convolution calculation in Aqwa has a 120 second memory, but after a hot restart this memory is lost.
In analyses with tethers or cable dynamics, the instantaneous position of the cable or tether is lost.
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- --- -- ---- ----------- --------- ---------
|X| | |HOTS| | | |
- --- -- ---- ----------- --------- ---------
| | |
| | |_ (2)Start Time of the Hot-Start Run (F10.0)
| |
| |_(1)Time Step Number at which Hot-Start run beings (I10)
|
|_Compulsory Data Record Keyword (A4)
(1) This is the time step number in a previous run at which the user wants the hot-start run to begin.
(2) This is the time at which you want the hot-start run to begin. If both a start time step number and start time are defined, the time step number takes priority.
When the HOTS data record is defined, the parameters for the TIME data record are now as follows:
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- --- -- ---- ----------- --------- ---------
|X| | |TIME| | |XXXXXXXXXX|
- --- -- ---- ----------- --------- ---------
| | | | | ¦_ Blank
| | | | |
| | | | |_(2) Value of Time Step (F10.0)
| | | |
| | | |_(1)Number of Time Steps for The Hot-Start Run(I10)
| | |
| | |
| | |
| | |_Compulsory Data Record Keyword (A4)
| |
| |_Optional User Identifier (A2)
|
|_Compulsory END on last data record in Data Category (A3)
(1) The number of time steps for this hot-start run only.
(2) This defines the time step size for this hot-start run.