8 - Response to Harmonic Excitation
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Practice Questions
Test your understanding with targeted questions
Identify the components of the equation mx¨(t) + cx˙(t) + kx(t) = F sin(ωt).
💡 Hint: What do each of the letters stand for in the equation?
What happens when r equals 1 in relation to resonance?
💡 Hint: Think about the natural frequency matching the forcing frequency.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What occurs at resonance?
💡 Hint: Recall the nature of resonance in oscillatory systems.
True or False: The damping ratio increases the amplitude of vibrations.
💡 Hint: Think about how damping affects motion.
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Challenge Problems
Push your limits with advanced challenges
Given a system with a mass of 10 kg, a damping coefficient of 5 Ns/m, and a stiffness of 200 N/m, calculate the natural frequency and the change in amplitude at resonance.
💡 Hint: Think about how to derive natural frequency from fundamental formulas.
If a building's damping ratio is found to be 0.05, determine how this might affect the building’s response to earthquake-induced harmonic excitation.
💡 Hint: Consider the implications of damping on responsiveness during dynamic loading.
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