PE/FE Review – Vibrations Problem Solutions
The solution is r=4.72. Using =105, the natural frequency of the foundation should be (105/4.72)=22.2 rad/sec. Knowing the natural frequency and the mass, we can find . k=128 lbs/in. The transmitted force is 10% of F0 or . 57.1 lbs. Problem #V7. The car velocity is V and one wave is L=10 feet. Therefore the wave period is: L = V or =L/V ................
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