Setting a load in a Direct Frequency Response Analysis
Altair EmployeeHello,
I have a doubt, and I was wondering if someone here could help.
I am setting up a Direct Frequency Response Analysis, and I want to set an oscillating load. I've read the documentation and some tutorials, however, I can't find the solution.
The load I want to apply is:
force (time)=A+B*cos(wt)
A and B are constants, and w is the angular frequency.
If A=0, the proccess would be (I think):
- Set a unit load in the given direction, with load type DAREA, and magnitude 1.
- Set a TableD1 load collector, with a range of frequencies and y=B
- Set Freqi and Rload2 load collectors, and a freq resp (direct) loadstep accordingly.
(I would be grateful if someone can confirm that is correct)
However, when A is not zero, I have no idea what I should do.
One more thing, is there a way to view the applied load in Hyperview? If there was, I could see for myself what I am doing. EDIT: I think I found a way to do this, with the global output request OLOAD, not sure it it'll work though.
Thanks for your attention, hope someone can help!
Regards
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Altair EmployeeI will answer to myself in case it's useful for someone.
Firstly, if you want to introduce a time-dependant force (instead of frequency dependant) you should do a Transient Analysis (not a Direct Frequency Response Analysis).
Secondly, you can't introduce a force=A+B*sin(wt). You have to apply A and B*sin(wt) as two different forces, and then combine those two, using the DLOAD method as suggested above.
Thanks
Hi,
In your case to combine loads, using DLOAD may be helpful