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2 cards from this section. Quick, good the night before a test.
What is the damping ratio for an undamped system?
Think about the condition where no energy is lost.
How does an underdamped system behave?
Consider how you would describe a swing slowing down.
What is the damping ratio for a critically damped system?
Remember the definition of critically damped.
True or False: Logarithmic decrement can only be calculated from experimental data.
Think about the formula; it relies on amplitudes.
A building has a damping ratio of 0.1. Explain how you would advise an engineer about its design against seismic activity.
Consider the relationship between damping and safety.
Given a system with a logarithmic decrement of 1.5, calculate the damping ratio and discuss its implications for structural design.
Remember the formulas when estimating damping.
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