Automotive vibration

[Tunalover]

Folks I'm new to the automotive business but not to defense. I was taught that, for example, propeller-driven craft will always have structure-born vibration that is typically 40Hz or below. So any time I had to design something that went on a ship I would ensure that nothing in the design had a natural frequency of 40Hz or below.

But I don't know about automotive. Are there any rules of thumb or "pearls of wisdom" about frequency ranges automotive equipment should avoid due to engine- and road-induced vibration?

TIA for your valuable input!

Tunalover

 

[IRstuff]

Suspension frequencies are in the low Hz range, so need to avoid those.

Humans in autos are way less tolerant of body vibration ISO 2631-1 Mechanical Vibration and Shock - Evaluation of Human Exposure to Whole-Body Vibration covers that

TTFN (ta ta for now)
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[GregLocock]

You may be able to get your hands on a 'Modal Alignment Chart'. This encapsulates pearls of wisdom like don't align engine vertical mode with chassis vertical bending, and keep everything clear of wheelhop.

However you won't be getting mine, it is not mine to give away.

Cheers

Greg Locock


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