Chronology | Current Month | Current Thread | Current Date |
[Year List] [Month List (current year)] | [Date Index] [Thread Index] | [Thread Prev] [Thread Next] | [Date Prev] [Date Next] |
On Thu, 7 Dec 2000, Leigh Palmer wrote:phenomenon
Sounds suspiciously like this is fostering a well known misconception.
You're right!
The Tacoma Narrows Bridge was not driven by an oscillatory wind; it
was an aeolian oscillation driven by a steady wind. I will guess that
the simulator demonstrates a resonance phenomenon. As I've pointed out
more than once, the Tacoma Narrows Bridge collapse is not an instance
of a resonance phenomenon.
Hmmm. "Resonance" seems to have two meanings: sympathetic vibrations,
versus vibration mode of a system. The bridge was a resonance
in that it break into oscillation at a resonant frequency. However,since
the wind wasn't pulsing, it wasn't a sympathetic vibrations phenomenon.(O) ) ) ) ) )))))))))))))))))))))
I suppose the sodaplay simulation better illustrates the legendary
marching soldiers problem.
((((((((((((((((((((( ( ( ( (
William J. Beaty SCIENCE HOBBYISTwebsite
billb@eskimo.com http://www.amasci.comscience
EE/programmer/sci-exhibits science projects, tesla, weird
Seattle, WA 206-789-0775 freenrg-L taoshum-L vortex-Lwebhead-L