Dynamic Simulation - Input Grapher: Custom Formula
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Hello everyone,
I have a problem using the "Formula" function of the input grapher for Force load in dynamic simulaiton. Should not be a big deal, but I really cannot figure it out.
I want to use the Time-variable of my simulation to create a sine function which increases in frequency over time to run a frequency-sweep on my construction. I.e.
y = 10*sin(Time*(Time/10)/PI)
should create a sine funciton which starts at 0 Hz and is after 100 seconds at ~10 Hz. See screenshot 02. Screenshot 01 shows how I did it in Inventor, somehow that does not work.
As screenshot 03 shows I could do it manually using many sine functions, but since I want to do the sweep from 0 to 150 Hz I really don't want to do that, plus the stepsize of 1 Hz is a bit too big.
I'm doing all of this to find the Eigenfrequencies (especially 2nd and 3rd) of the construction. On the right of screenshot 03 you see how that would look like, here the 1st Eigenfrequency is found after 30 seconds at ~7 Hz.
Is it possible to find higher Eigenfrequencies with Inventor using this method? And if yes, how can I get my Formula from above working? Any help is appreciated!
Calvin
