Indicative contents

NVH context in the Automotive Industry
Sources of noise and vibration, design features, Decibel scale, analytical tools

NVH Theory Essentials
Single DOF systems: natural frequency, modal damping, transient and frequency responses, resonance, transmissibility and isolation.
Multi DOF systems: eigenvalues and eigenvectors, modal participation, mode management in vehicles.
Acoustics: standing and traveling waves, impedance concepts, resonances, transmissiblity and absorption

FEA and Optimization
Large mass concept, Frequency response solutions, Design drivers for NVH, Case studies of chassis and brake disk optimization

Test Facilities and Instrumentation
Sampling, aliasing and resolution. Statistical analysis. Frequency analysis. Campbell's plots, cascade diagrams, coherence and correlation functions.

Transferable Skills
Source ranking. Noise path analysis. Modal analysis. Parametric testing and Taguchi techniques. Optimisation of dynamic characteristics. Vibration absorbers and Helmholtz resonators. Active control techniques.

Module Resources

• Essential reading
  
  1. Pre-printed notes cover the core content of the module but need to be supplemented by reference to:
     
• Recommended reading
  1. W.T. Thomson, Mechanical Vibration, 5th Edition, Prentice- Hall, 1997.
  2. S.S. Rao, Mechanical Vibrations, 3rd Ed, Addison Wesley, 1995.
  3. M.P. Norton, Fundamentals of Noise and Vibrations Analysis for Engineers, Cambridge University press, 1994.
  4. Leonard Meirovitch, Elements of Vibration Analysis, McGraw Hill, 1986.
  5. Daniel J. Inman, Engineering Vibration, Prentice Hall, 1996.
  6. Bruel and Kjar booklets on:
     i) Noise Control: Principles and Practice
     ii) Measuring Vibration
     iii) Structural Testing, Parts 1 & 2
  7. S.P. Parker, Acoustics Source Book, McGraw-Hill (1987)
  8. D.J. Ewins, Modal Testing: Theory, Practice and Applications, Research Studies (2000)
  9. N.J. Mansfield, Human Response to Vibration, CRC Press (2005)
• Laboratory
      1.   Hardware: PC.
      2.   Software: MSC/NASTRAN, MSC/ADAMS, MATLAB, LMS Virtual Lab.