Description
Taylor & Francis Vehicle Noise and Vibration Refinement 2010 Edition by Xu Wang
High standards of noise, vibration, and harshness (NVH) performance are expected in vehicle design. Refinement is therefore one of the main engineering/design attributes to be addressed when developing new vehicle models and components. This book provides a review of noise and vibration refinement principles, methods, advanced experimental and modeling techniques and palliative treatments necessary in the process of vehicle design, development, and integration in order to meet noise and vibration standards. Case studies from the collective experience of specialists working for major automotive companies are included to form an important reference for engineers practising in the motor industry who seek to overcome the technological challenges faced in developing quieter, more comfortable cars. The reader will be able to develop an in-depth knowledge of the source and transmission mechanisms of noise and vibration in motor vehicles, and a clear understanding of vehicle refinement issues that directly influence a customer's purchasing decision. Table of contents :- PART I: INTRODUCTION Rationale and history of vehicle noise and vibration refinement; X Wang, RMIT University, AustraliaObjectives and significance of vehicle noise and vibration refinement. Scope of vehicle noise and vibration refinement. The vehicle development process and vehicle noise and vibration refinement. Vehicle noise and vibration term definitions. History of motoring and vehicle refinement. Target setting and benchmarking for vehicle noise and vibration refinement; X Wang, RMIT University, AustraliaIntroduction. Benchmarking of vehicle noise and vibration. Target setting of vehicle noise and vibration. PART II: MEASUREMENT AND MODELLING Vehicle vibration measurement and analysis; X Wang, RMIT University, AustraliaIntroduction. Hand sensing. Basic vibration measurements. Vibration response investigation and vibration test. Environmental testing. Mounting the test object. Measuring complex elastic modulus. Quoting vibration levels. Vibration isolation. The vibration absorber. Case studies. Bibliography.Vehicle noise measurement and analysis; X Wang, RMIT University, AustraliaIntroduction. Sound fundamentals. Vehicle noise. Measuring microphones. Measuring amplifiers. Calibration. Background noise. Recording sound. Analysis and presentation of noise data. Artificial head technology and psychoacoustics. Bibliography.Random signal processing and spectrum analysis in vehicle noise and vibration refinement; X Wang, RMIT University, AustraliaRandom data and process. Correlation analysis. Fourier series. Spectral density analysis. Relationship between correlation functions and spectral density functions. Linear systems. Weighting functions. Relationship between the complex frequency response and impulsive response. Frequency response functions. Bibliography.Theory and application of modal analysis in vehicle noise and vibration refinement; M Kronast, Ford-Werke GmbH, GermanyApplication of modal analysis in vehicle development. Theory of modal analysis. Methods for performing modal analysis. Limitations and trends. References.Mid- and high-frequency problems in vehicle noise and vibration refinement - statistical energy analysis and wave approaches; X Wang, RMIT University, AustraliaModal approach. Energy sharing between two oscillators. Energy exchange in multi-degree-of-freedom systems. Wave approach to the statistical energy analysis (SEA). Procedures of statistical energy analysis approach. Evaluation of the statistical energy analysis subsystem parameters. Hybrid deterministic and statistical energy analysis approach. Application example. References.Advanced simulation techniques in vehicle noise and vibration refinement; N Hampl, Ford-Werke GmbH, GermanyBasic simulation techniques. Frequency or time-domain methods. Simulation process. Application of virtual reality for vehicle noise and vibration refinement. Conclusions. Sources of further information and advice. Advanced experimental techniques in vehicle noise and vibration refinement; T Ahlersmeyer, Ford-Werke GmbH, GermanyTransfer path analysis technique. Sound intensity technique for source identification. Acoustic camera: beamforming and nea field acoustic holograph techniques for source diagnostics. Laser techniques for dynamic analysis and source identification. Sound quality and psychoacoustics measurement and analysis. Ultra sound diagnostic techniques. Advanced material testing techniques. Advanced tachometer reference tracking techniques. PART III: NOISE AND VIBRATION REFINEMENT IN VEHICLE SYSTEMS Aerodynamic noise and its refinement in vehicles; S Watkins, RMIT University, AustraliaThe importance of aerodynamic noise. Aerodynamic noise sources: background. Modeling, relevant theory and the possibilities of simulation. Causes of hydrodynamic pressure fluctuations and their reduction. Aeroacoustic measurement techniques and psychoacoustic analysis. Conclusions. Acknowledgments. Active noise and vibration control in vehicles; S J Elliott, University of Southampton, UKPhysical principles and limits of active control. Control strategies. Commercial systems. Future trends. Sources of further information and advice. Noise and vibration refinement of powertrain systems in vehicles; D C Baillie, General Motors Holden Ltd, AustraliaPrinciples and methods. Powertrain noise sources and paths. Enablers and applications. Future trends. Conclusions. Vehicle interior noise refinement - cabin sound package design and development; D Vige, Centro Ricerche Fiat, ItalyInternal noise sources in a vehicle. Vehicle noise paths. Basic principles. Sound package solutions to reduce the interior noise. Simulation methodologies for the interior noise. Target setting and deployment on vehicle subsystems. Conclusions. Noise and vibration refinement of chassis and suspension; B Reff, Ford-Werke GmbH, GermanyRoad-induced noise, vibration and harshness (NVH) basic requirements and targets. Foundations of road-induced noise, vibration and harshness. The tyre: the most complex component? Suspension. Mounts and bushes aEURO" the art of isolation. Future trends. Body structure noise and vibration refinement; G M Goetchius, Material Sciences Corporation, USABasic principles. Global body stiffness. Body attachment behaviour. Body attachment design strategies. Body panel behaviour. Panel design strategies. Future trends. Conclusions. Vehicle noise and vibration strategy-based diagnostics; X Wang, RMIT University, AustraliaWheel and tire vibrations. Balancing. Driveline vibration. Propshaft phasing. Each chapter begins with an "Introduction" and concludes with either a "References" section or a "Bibliography"