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ME340: Post-Lab 5 Section: Name: Due in Lab 6
Two Degree-of-Freedom Analysis
Experiment I: Power Spectral Density (PSD) Plot
1. (5pts) Enter the values found from the power spectral density plot below
Modal Frequency Units
1
f
=
2
f
=
Experiment II: Sine Sweep
2. (5pts) Enter the values found from the sine sweep below
Modal Frequency Encoder 1 Data Units
1
f
2
f
Experiment III: Modal Frequency Comparison Table
3. (5pts) At which modal frequency are the mode shape, in phase? out of phase? And what
are the mode shapes?
Modal Frequency In Phase or Out of
Phase Mode Shape (Ratio of
Amplitudes)
1
f
2
f
4. (5pts) Compile all values obtained and compare the results
Modal
Frequency PSD Plot Sine Sweep Theory
(from prelab)
1
f
2
f