ME21 · Sem 5 · Dynamics of machinery
Effect of damping on vibration
Aim: See how damping lowers and widens the resonance peak.
🧪 Live simulation🧊 Real-time 3D bench⚠ Simulated values, not physical measurements
🔬 Virtual lab
Starting the lab…
📘 Theory
Damping removes energy each cycle. Light damping gives a tall, sharp peak; heavy damping flattens it. Above ζ = 0.707 there is no peak at all.
peak magnification ≈ 1/(2ζ) for small ζ
🧰 Apparatus (virtual)
- Spring–mass rig with adjustable damper
📝 Procedure
🎤 Viva questions
Why do car shock absorbers wear out
Their damping fluid degrades, so the car bounces more.
What is the damped natural frequency
fn·√(1 − ζ²).
🛡️ Safety
Virtual by default. Machine shops, CNC, presses and test rigs need instructor supervision, PPE and machine-specific safety training.