Automotive Load Spectrum and excited frequency

1. Apr 11, 2016

Gp7417

Hi all!
I have the following spectrum for a signal force:

and this is a zoom in the range of interest:

Can I state that this force is capable of exciting the natural frequency of the structure ( in the range 5-30Hz) or the force amplitude in this range is too low compared to the peak (3298.7N)?

2. Apr 13, 2016

devecseri

What is being graphed force and time? A force can excite an objects natural freq if it acts close to that freq as for how much depends on your transfer function, as a forced vibration approaches a natural freq there will be resonance and it will blow up

3. Apr 13, 2016

devecseri

Oh i see the graph better now, no this force would not excite a building's natural freq of 5-30 hz

You can see even at 5hz you don't even have half a newton so that's about 5 lbs pushing that building compared to like 30000 lbs i would assume that to be negligible unless its a particularly shakey building

Edit: Whoops i think you didn't mean a building but same thing