Load Spectrum and excited frequency

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SUMMARY

The discussion centers on the capability of a force spectrum to excite the natural frequency of a structure within the 5-30 Hz range. It is concluded that the force amplitude, which peaks at 3298.7N, is insufficient to excite the natural frequency, as even at 5 Hz, the force is less than half a Newton. The consensus is that the applied force is negligible compared to the structural requirements for resonance, particularly for robust structures.

PREREQUISITES
  • Understanding of natural frequency in structural dynamics
  • Knowledge of force spectra and their implications
  • Familiarity with transfer functions in vibration analysis
  • Basic principles of resonance and forced vibrations
NEXT STEPS
  • Research the principles of resonance in structural engineering
  • Study the impact of force amplitude on natural frequency excitation
  • Learn about transfer functions and their role in vibration analysis
  • Examine case studies of structural responses to dynamic forces
USEFUL FOR

Structural engineers, vibration analysts, and anyone involved in assessing the impact of dynamic forces on structures will benefit from this discussion.

Gp7417
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Hi all!
I have the following spectrum for a signal force:

1.jpg


and this is a zoom in the range of interest:

2.jpg


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)?
 
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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
 
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
 

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