Vibration Isolation Calculator
Transmissibility and isolation % from frequency ratio.
Below √2× the mount frequency, isolators make things WORSE — the most common AV-mount installation error. More damping helps at resonance but hurts isolation above it.
Formula
Vibration Isolation Calculator is a free vibration isolation for mechanical and machine-design engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Vibration Isolation Calculator
Transmissibility and isolation % from frequency ratio. The calculation implements T = √[(1+(2ζr)²)/((1−r²)²+(2ζr)²)], r = f/f_n (Den Hartog; mount manufacturer charts). Below √2× the mount frequency, isolators make things WORSE — the most common AV-mount installation error. More damping helps at resonance but hurts isolation above it.
How to use Vibration Isolation Calculator
- 1Enter Disturbing frequency in Hz (1,500 rpm = 25 Hz).
- 2Enter Mount natural frequency in Hz.
- 3Enter Damping ratio (Rubber 0.05 · springs 0.005).
- 4Read Frequency ratio r, Transmissibility, Isolation instantly — no submit button needed.
Why use Vibration Isolation Calculator?
- ✓Implements the standard formula — T = √[(1+(2ζr)²)/((1−r²)²+(2ζr)²)], r = f/f_n
- ✓Reference cited on-page: Den Hartog; mount manufacturer charts
- ✓Built-in engineering verdict flags out-of-range results instantly
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Vibration Isolation Calculator use?+
It computes T = √[(1+(2ζr)²)/((1−r²)²+(2ζr)²)], r = f/f_n, per Den Hartog; mount manufacturer charts. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Below √2× the mount frequency, isolators make things WORSE — the most common AV-mount installation error. More damping helps at resonance but hurts isolation above it.
Is this suitable for machine design coursework?+
Yes — these are the exact Shigley/Machinery's-Handbook formulas, with the substitution shown step by step, so you can follow the worked example into your own calculation sheet.
Is the Vibration Isolation Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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