ANy body can explain to me what is the function of frecuency
analysis in the real life ? I am still confuse about the function
of this type of analysa.
to visualize the dynamic character of a set of designs. Note
that Ux, Uy and Uz are useful but not a predictor of actual
deformation. I trend u across studies. I also trend the algebraic
sum of u and track how far off of a goal it is. A goal of zero is
popular since that would mean something like dynamic symmetry, of
course depending on the geometry and the industry. Mine is
loudspeaker driver design so non-axisymmetric moving mass dynamism
is predicted by modal analysis.
A common use of Frequency Analyses are to compare the
natural, or resonant, frequencies of a part or assembly to the
input frequencies. The example I like to use is a grinding wheel in
the shop. It usually sits on a steel frame bolted to the floor.
Most people have noticed that after turning the motor on and as the
wheel accelerates to operating speed, the stand shutters and
vibrates, then settles down. The wheel speed (RPM) just passed thru
the first natural frequency of the stand, causing it to resonante
and vibrate. When the wheel speed increased past that natural
frequency, the stand stops shaking. It would be important from a
desinger standpoint, to make sure that the 1st natural frequency of
ths stand wasn't the operating speed instead of some intermediate
speed since the stand wouldn't be usable and would shake itself to
death.
Does this make more sense?
Both of your explanation is very useful for me.
- DD