Evaluating Chassis Stiffness, any ideas? |
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Evaluating Chassis Stiffness, any ideas? |
McMark |
Jan 26 2007, 03:08 PM
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#1
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
I've been thinking about this for a long time. I would like to be able to quantitatively evaluate chassis stiffness. I have some ideas for increasing stiffness, but I'd like to be able to measure those changes by something other than the seat of my pants ("It feels stiffer.").
My best idea so far is to place a car on three jack stands of equal height and measure the droop of the fourth corner. Any other ideas? Any physicists that can help out here? |
TonyAKAVW |
Jan 26 2007, 08:47 PM
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#2
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That's my ride. Group: Members Posts: 2,151 Joined: 17-January 03 From: Redondo Beach, CA Member No.: 166 Region Association: None |
To measure a chassis' resonsant frequency you have to mount the whole chassis to a giant transducer (speaker voice coil) and either pump it with white noise or sweep it from very low to very high frequency. I imagine this would have to be done in an acoutsically neutral (anechoic chamber) room to get good results.
For turbine blades and other stuff, they illuminate the whole thing with a pair of lasers and you can see the modes visibly as interference patterns. I think you have to polarize the light at some point... Anyway, not cheap, not easy is my guess. -Tony |
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