I am able to do Random vibration and Sine vibration by using Sol103 response simulation,
I would like to do sine on random (combined sine and random).
20Hz, 0.01 g2/Hz
100Hz, 0.01 g2/Hz
at 20Hz 1.5G,
at 100Hz, 2G.
I am thinking that I need to add these sine spikes to random graph, that means giving spikes at a perticular frequency.
if at all it is correct, what will be the slop of the sine spike?
A practical approach to do sine on random is to come up with equivalent PSD for your sine tones, and then perform a random vibe analysis (SOL111) for the combined PSD.
Another approach is to convert everything to transient, do the combination there and solve for transient.
This is one method, yes. We actually prefer not to go the transient route for several resaons (including the non-uniqueness of the PSD to transient conversion). We prefer staying in the frequency domain, and convert the sine to PSD bands... Then comes the question of how to calculate the band, there are also several methods for that...
Quite right. Was just an (google-ed!) pointer. What is your prefered way of calculating "the band" then?