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2 cards from this section. Quick, good the night before a test.
What occurs when two natural frequencies are close together in a 2-DOF system?
Think about how vibrations interact in a system.
Define the beating phenomenon.
Remember it involves alternating amplitudes.
What is mode coupling?
Think about what happens when two vibration frequencies are similar.
True or False: The beating phenomenon leads to vibration with constant amplitude.
Recall the definition of beating.
A two-story building has natural frequencies of 1 Hz and 1.1 Hz. If excited with a harmonic force at 1 Hz, what is the expected effect?
Consider how closely spaced frequencies interact.
In a bridge design, you identify potential mode coupling between the oscillations caused by traffic. Propose mitigation strategies.
Think about structural adjustments and damping techniques.
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