OME431 Vibration and Noise Control Strategies Syllabus:
OME431 Vibration and Noise Control Strategies Syllabus – Anna University PG Syllabus Regulation 2021
OBJECTIVES
To appreciate the basic concepts of vibration in damped and undamped systems
To appreciate the basic concepts of noise, its effect on hearing and related terminology
To use the instruments for measuring and analyzing the vibration levels in a body
To use the instruments for measuring and analyzing the noise levels in a system
To learn the standards of vibration and noise levels and their control techniques
UNIT I BASICS OF VIBRATION
Introduction – Sources and causes of Vibration-Mathematical Models – Displacement, velocity and Acceleration – Classification of vibration: free and forced vibration, undamped and damped vibration, linear and non-linear vibration – Single Degree Freedom Systems – Vibration isolation – Determination of natural frequencies
UNIT II BASICS OF NOISE
Introduction – Anatomy of human ear – Mechanism of hearing – Amplitude, frequency, wavelength and sound pressure level – Relationship between sound power, sound intensity and sound pressure level – Addition, subtraction and averaging decibel levels – sound spectra -Types of sound fields – Octave band analysis – Loudness.
UNIT III INSTRUMENTATION FOR VIBRATION MEASUREMENT
Experimental Methods in Vibration Analysis.- Vibration Measuring Instruments – Selection of Sensors – Accelerometer Mountings – Vibration Exciters – Mechanical, Hydraulic, Electromagnetic and Electrodynamics – Frequency Measuring Instruments -. System Identification from Frequency Response -Testing for resonance and mode shapes
UNIT IV INSTRUMENTATION FOR NOISE MEASUREMENT AND ANALYSIS
Microphones – Weighting networks – Sound Level meters, its classes and calibration – Noise measurements using sound level meters – Data Loggers – Sound exposure meters – Recording of noise – Spectrum analyser – Intensity meters – Energy density sensors – Sound source localization.
UNIT V METHODS OF VIBRATION CONTROL, SOURCES OF NOISE AND ITS CONTROL
Specification of Vibration Limits – Vibration severity standards – Vibration as condition Monitoring Tool – Case Studies – Vibration Isolation methods – Dynamic Vibration Absorber – Need for Balancing – Static and Dynamic Balancing machines – Field balancing – Major sources of noise – Noise survey techniques – Measurement technique for vehicular noise – Road vehicles Noise standard – Noise due to construction equipment and domestic appliances – Industrial noise sources and its strategies – Noise control at the source – Noise control along the path – Acoustic Barriers – Noise control at the receiver — Sound transmission through barriers – Noise reduction Vs Transmission loss – Enclosures
OUTCOMES:
On Completion of the course the student will be able to
1. apply the basic concepts of vibration in damped and undamped systems
2. apply the basic concepts of noise and to understand its effects on systems
3. select the instruments required for vibration measurement and its analysis
4. select the instruments required for noise measurement and its analysis.
5. recognize the noise sources and to control the vibration levels in a body and to control noise under different strategies.
REFERENCES:
1. Singiresu S. Rao, “Mechanical Vibrations”, Pearson Education Incorporated, 2017.
2. Graham Kelly. Sand Shashidhar K. Kudari, “Mechanical Vibrations”, Tata McGraw –Hill Publishing Com. Ltd., 2007.
3. Ramamurti. V, “Mechanical Vibration Practice with Basic Theory”, Narosa Publishing House, 2000.
4. William T. Thomson, “Theory of Vibration with Applications”, Taylor & Francis, 2003.
5. G.K. Grover, “Mechanical Vibrations”, Nem Chand and Bros.,Roorkee, 2014.
6. A.G. Ambekar, “Mechanical Vibrations and Noise Engineering”, PHI Learning Pvt. Ltd., 2014.
7. David A. Bies and Colin H. Hansen, “Engineering Noise Control – Theory and Practice”, Spon Press, London and New York, 2009.