17.5.2. Feature Extraction

Try these first

1. 1.

   What does natural frequency refer to?

   Hint

   Think about how a swing moves when pushed.

2. 2.

   Why is damping important for structures?

   Hint

   Consider why a car might have shock absorbers.

3. 3.

   What does natural frequency signify in structural mechanics?

   • The frequency of external forces
   • The frequency at which a structure naturally vibrates
   • None of the above

   Hint

   Think of it as the structure's 'voice' when disturbed.

4. 4.

   True or False: Damping reduces oscillations in structures.

   • True
   • False

   Hint

   Remember how a suspension system works in vehicles.

5. 5.

   Suppose you have a bridge that exhibits an increasing trend in displacement over several months. What maintenance actions would you recommend?

   Hint

   Consider possible causes and consequences of increased displacement.

6. 6.

   Given the modal analysis data, explain how you would utilize the natural frequency and damping ratio to predict future performance of a structure during an earthquake.

   Hint

   Think about the resonance effect in structures.