|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]|
I believe it is important that these students, AT THE LEAST, realize
there are different modes and they affect real structures in
different ways: a longitudinal wave in a thin I-beam will have a
effect different from a transverse wave in the same beam which in
turn will differ from the effect of a torsional wave, and a vibration
source touching that beam will produce all three modes.
Concrete is very strong under compressive forces but very weak under
shear. Longitudinal waves would affect concrete very differently
than transverse waves.
So, I'm concluding that the important content for an introductory
cal-based course, regarding modes of wave motion is there are 3
primary modes of mechanical wave propagation: transverse,
longitudinal, and torsional.