Variable Output time increment
When using the SMACO option, the output time increment has to be 0.001 during the collision. In the subject Example, the impact isn’t until after 0.35 seconds, so you can either change the print output time increment, card 1, field 6 (DTPRN0 – the print interval) to 0.001 seconds, or use the optional Output time increment control of input card 1, sequence 1.
Use the change print output option of input card 1, sequence 1.
If your input file doesn’t have the input card, simply enter a 1 for Card and 1 for Seq as follows
Then simply press the button entitled Manual insert by Card/seq (in this example the card is already inserted)
On input card 1, seq 1, we have inserted the following
Which produces the Print Output Intervals as follows:
The default or start time increment is 0.01 seconds, set on input card 1-0, field 6.
Then the inputs on card 1, sequence 1 is as follows:
At T= 0.350 Sec, Print Interval to be changed to DTPRT= 0.001 Sec
At T= 0.50 Sec, Print Interval to be changed to DTPRT= 0.010 Sec
These inputs change the default print output of 0.01 to 0.001 at 0.35 seconds (the impact it as 0.357 seconds)
And then at 0.50 seconds, the time increment is changed again to 0.010 seconds.
To determine when an impact in any msmac run occurs,
Simply open the View menu->Item 2, Run Summary
smac Animation (mGraphics) inputs:
• To view the Smac animation inputs, select Project menu and then the file SMAC Occupant Example.sa5
Couple things to note in the Sa5 input file:
• ISMACO is set to 1 to display in vehicle 1. Set it to 2 to display in vehicle 2. (msmacan input card 5, field 6)
• The SIZSYM,SIZSY2 inputs are no longer used. These originally were used to set the size of the 'ball' display. It is now set to the radius you set on the smaco input card.
• The SMACO input cards are entered after the ‘Option=SMACO” card.
• You can enter up to 4 SMACO objects
• In this simulation we only enter 2, 1 for the Driver and one for the passenger
• The release time is set to just prior to impact (0.30 seconds) and the initial display time is set to 0.00
• Also note that if you set the initial time of 'release' of smaco (1st input, 1st field) to the start time of the run then you must set the initial velocities, etc. in the smaco inputs.
• This run also displays the acceleration vector display. The inputs are accomplished by the Include=OCC1.ACC. In the file OCC1.ACC are the inputs required to display the acceleration vector. You can easily omit the display by inserting a # on the line with
o Include= SMAC Occupant Example.ACC
• You can open the ACC file, it is a simple text file, and you see it contain VEHOB commands related to displaying the acceleration vectors.
Barrier Option Example