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2 cards from this section. Quick, good the night before a test.
What is modal mass?
Think about how mass interacts with vibration.
What is the formula to calculate modal mass?
Remember the symbols involved in the calculation.
What does modal mass represent in structural engineering?
Consider the role of vibrations in analyzing structures.
True or False: Modal mass is only concerned with the total mass of a structure.
Think about the definition of modal mass.
Based on given mode shapes and a mass distribution for a structure, derive the modal mass for the first mode of vibration. Discuss the implications if the modal mass is underestimated in seismic design.
Make sure to detail the calculations clearly.
Evaluate a scenario where a multi-story building's design failed due to not considering modal mass correctly. Propose a revised calculation method utilizing effective parameters.
Focus on how modal mass could have changed results.
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