// multi-utility computation suite · offline · instant · precise
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eng.floor-vibration-acceptance Calculator
Calculates floor vibration response to human walking excitation and checks against acceptance criteria from the Aisc/Canadian Steel Design practice guide. Walking excitation fundamental frequency of 1.8–2.2 Hz matches the dominant frequency of framed floors — resonance can cause disturbing vibration even below deflection limits.
Inputs
Modal Mass Kg
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Stiffness Kn M
Reference formula or conversion factor shown for context.
Damping Ratio Pct
Reference formula or conversion factor shown for context.
Excitation Force N
Maximum displacement from equilibrium. Energy carried by a wave is proportional to amplitude squared.
Results
natural frequency fn (Hz)
Frequency at which the structure resonates freely (Hz). If machinery operates near this, resonance can amplify vibrations dangerously. Engineers detune structures to avoid it.
peak acceleration (m/s²)
The proportional relationship between two quantities.
peak acceleration (mg)
The proportional relationship between two quantities.