Could you advise me on which equation for MF you would use to plot the theory frequency response for this system given this equation of motion? there's 3 I'm trying to decide between, the bottom is always the same but on top it could be either 1, √1+(2ζr^2) , or r^2 .
Following notes i seem to be ending up at √1-(2ζr^2) on top but if i plot it with r^2 on top it seems to follow my practical experiment results better so I'm pretty confused now and can't find any help in textbooks because they talk about either relative motion or absolute motion where as this system is kind of a mix :-/