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Crystal Flavolian
muttley600 said:Nah, I just gotta useless Masters Degree in Musical acoustics.
Misplaced decimal pointSomething similar happened here in London when they built the Millenium footbridge. They took ages to find out what was happening as the bridger started to violently wobble as people crossed it. The Engineers in question were called and explained there calculations and sure enough everything was fine.. A while later and after much head scratching they found out the public were to blame. Turns out that without knowing it you fall into step with others as you cross a bridge by just feeling the slightest acoustic response. Put a bunch of people on the bridge and they would set it into motion.
Much money and time later they built damping into it and all is well.
Yeah, I remember hearing that marching soldiers collapsed a few bridges (in WWI, maybe?) when they happened to hit a resonance peak while crossing them before the commanders learned to get them to break cadence and simply walk across them. And of course there was that hotel balcony (in Memphis, wasn't it?) that collapsed during a swing music party.
And there was the infamous Mars shot which augered in because two teams of engineers didn't write in the units - one team meant pounds and the other meant kilograms. Oops.