Vibration and Noise Control — Winter 2017

Define Vibration. What are the main reasons of vibration? State the importance of vibration study in engineering.

Define following terms:  Resonance  Degrees of Freedom  Damping  Time Period  Natural Frequency  Periodic Motion  Forced Vibrations

What is Damping? Why it is needed? Also prove that in case of Coulomb damping amplitude reduces by 4F/k in one complete cycle.

Explain the types of damping in detail

Describe Beats phenomena along with neat sketches

Discuss and describe Logarithmic Decrement

Adamper offers resistance of 0.05N at constant velocity of 0.04 m/sec. The damper is used with k= 9 N/m. Determine the damping and frequency of the system when mass of the system is 0.10 kg.

Explain the working principles of an accelerometer along with a neat sketch.

Write a short note on frequency measuring device

Derive the equations for an under-damped system

Explain basics of Vibration absorbers with example. What is the difference between vibration absorber and vibration isolator.

Explain the working principles of vibrometer along with a neat sketch.

Derive the equations for an over-damped system

Describe in detail vibration isolation

Write a note on Transmissibility.

Explain 1. Torsionally equivalent shaft. 2. Control of Vibrations

Explain in detail series and parallel connections of Springs.