Tutorial: Sine Sweep Fatigue Analysis
Hi guys,
i have a question regarding the 'Sine Sweep Fatigue Analysis' tutorial (spring link example). The guidance tells me to check the SWEEP-Flag in FATPARM Card without any further options.
This causes an error (ERROR # 1000: incorrect data in field # 4), probably because this line indicates options for Sweep Fatigue but there is no option following.
Do i have to delete the whole '+ SWEEP'-option in FATPARM or is there something missing in my deck, that is not mentioned in the guidance?
Thanks,
Philipp
Answers
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you should better take a look at the fatparm documentation.
Error #1000 is complaning that field #4 is missing. It is one of these fields below. (4th field of the line).
<?xml version="1.0" encoding="UTF-8"?>
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Thank you for the answer. I didn't explained the error message very well, I'm sorry for that. The Problem is the 'SWEEP'-continuation of the FATPARM (see the picture below). The error occours because of the 0.0 in field # 4.
To explain my Problem a bit more in detail:
OptiStruct want's me to set some kind of frequency value for the sine fatigue calculation in field #4. The Problem is, that there is no value given in the tutorial () for the SWEEP-continuation in the FATPARM. It just tells me to check the SWEEP-Option and do nothing else here.
The 'NFREQ' and the frequency value of 0.0 must be set by Optistruct by default, because in my .fem-file I just have 'checked' the SWEEP-continuation of FATPARM by typing '+ SWEEP'. Now I wondered if i can leave the continuation here because no information is given or if there is some information missing in the tutorial.
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i see.
it really don't give you the frequency.
I would use the same frequency range as the TABLED1 card (0 to 1000Hz).
As you want to sweep though the same frequency range, makes sense.
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Altair Employee