EFFECT FROM THE ACADEMIC YEAR 2013 - 2014

AE 410

VIBRATIONS & NOISE CONTROL

Instruction                                                                                                                                                                                                                                                                           4  Periods per week

Duration of University Examination                                                                                                                                                                                                                                   3   Hours

University Examination                                                                                                                                                                                                                                                       75 Marks

Sessional                                                                                                                                                                                                                                                                               25 Marks

UNIT-I

Fundamentals of Vibration: Introduction, classification of vibration: free and forced vibration, undamped.and damped vibration, linear vibration, response of damped and undamped systems under harmonic force, analysis of single degree freedom system, torsional vibration, determination of natural frequencies.

UNIT-II

Fundamentals of Noise: Decibel, sound pressure level, sound intensity, sound fields, reflection, absorption and transmission.

Noise Measurement: Sound meter

Analysis of Noise: Frequency analysis, tracking analysis, sound quality analysis.

UNIT-III

Automotive Noise Sources: Noise Characteristics of engines, engine overall noise levels, assessment of combustion noise, assessment of mechanical noise, engine radiated noise, intake and exhaust noise, engine accessory contributed noise, transmission noise, aerodynamic noise, tyre noise, brake noise.

UNIT-IV

Vibration Isolation And Control Methods: Vibration isolation, tuned absorbers, untuned viscous dampers, damping treatments, application dynamic forces generated by 1C engines, engine isolation, crank shaft damping, modal analysis of shock absorbers.

UNIT-V

Automotive Noise Control Methods: Methods for control of engine noise, combustion noise, mechanical noise, predictive analysis, automotive

noise control principles, sound in enclosures, sound energy absorption, sound transmission through barriers

Suggested Reading :

 1.Singiresu S.Rao, Mechanical Vibrations, Pearson Education, ISBM -81-297-0179-0 - 2004.

 2.Kewal Pujara, Vibrations and Noise for Engineers, Dhanpat Rai & Sons, 1992.

 3.Bernard Challen and Rodica Baranescu, Diesel Engine Refrence Book, Second edition - SAE International - ISBN 0-7680-0403-9-1999.

4.Julian Happian-Smith, An Introduction to Modern Vehicle Design,

Butterworth-Heinemann, ISBN 0750-5044-3 - 2004

 5.John Fenton, Handbook of Automotive body Construction and Design Analysis, Professional Engineering Publishing, ISBN 1-86058-073- 1998.