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2 cards from this section. Quick, good the night before a test.
What does a two degree of freedom system represent?
Think about how many places forces can act independently.
What is ground acceleration?
Consider how quick the ground is moving during an earthquake.
What is the equation governing response to earthquake ground motion in a 2-DOF system?
Remember the components that represent mass, force, and response.
True or False: The modal participation factor indicates that each mode contributes to the system's overall response.
Think about how each oscillation mode influences the total behavior.
Given a 2-DOF system with masses and coefficients identified, derive the equations of motion and compute the modal participation factors.
Start by establishing your mass and stiffness matrices.
If an earthquake causes a specific ground motion, calculate the total displacement response of a 2-DOF structure using modal superposition.
Think about how the contributions of different modes combine.
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