Can output forces be represented in the complex form? (in general and/or in ADAMS)

Hi All,

I have an ADAMS model and am extracting the bushing forces as a function of time. I'm being asked if these forces can be represented in the complex form.

As far as I can tell a force only has a real component and not an imaginary component...but perhaps I'm wrong on this. Do you know if this is possible in ADAMS?

thanks in advance,

joe.

0 Jesper Slattengren over 3 years ago

Forces are only real values.

The only way I can imagine representing a force as a complex value is to have a reference signal and use the complex part to represent the phase of a force relative to the reference signal. Typically the reference signal would be the displacement or velocity of the force element.

So in theory you can do this. We often use this to represent frequency dependent elements (such as bushings).

If you have your time domain simulation done, in PPT, use "Plot --> Bode Plot" functionality to calculate the transfer function. It will be presented to you as plots of magnitude and phase of course.

You should also be aware of that this is using FFT so normal FFT rules apply: Stationary, linear dependency gives the best Bode Plots.
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0 jsph_inc over 3 years ago

Thanks for the input JSlat..very helpful! I will look into this further. joe.
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