12.5 - Forced Vibration and Modal Analysis
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Practice Questions
Test your understanding with targeted questions
Define forced vibration in your own words.
💡 Hint: Think about systems responding to external conditions.
What do the terms M and K represent in the forced vibration equation?
💡 Hint: Consider the definitions of mass and stiffness.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the equation Mx¨ + Kx = F(t) represent?
💡 Hint: Focus on the definitions of vibration.
True or False: Modal analysis allows for the consideration of all modes simultaneously.
💡 Hint: Think about the term 'uncoupled'.
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Challenge Problems
Push your limits with advanced challenges
Consider a 2-DOF system subjected to a harmonic force F(t) = F0sin(ωt). Derive the equations governing this system in terms of modal coordinates.
💡 Hint: Identify the node's natural frequencies along with the force frequency.
Analyze the impact of increasing the coupling stiffness in the forced vibration of a two-story building modeled as a 2-DOF system.
💡 Hint: Predict changes using your knowledge of stiffness relationships.
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