Noise and vibration control of automotive body. (2018)

• Record Type: Book
• Further Information: Note: Jian Pang.
• Authors: Pang, Jian, 1963-
• Contents: Preface xiii 1 Introduction 1 1.1 Automotive Body Structure and Noise and Vibration Problems 1 1.1.1 Automotive Body Structure 1 1.1.2 Noise and Vibration Problems Caused by Body Frame Structure 7 1.1.3 Noise and Vibration Problems Caused by Body Panel Structure 8 1.1.4 Interior Trimmed Structure and Sound Treatment 8 1.1.5 Noise and Vibration Problems Caused by Body Accessory Structures 9 1.2 Transfer of Structural‐Borne Noise and Airborne Noise to Interior 10 1.2.1 Description of Vehicle Noise and Vibration Sources 10 1.2.2 Structural‐Borne Noise and Airborne Noise 11 1.2.3 Transfer of Noise and Vibration Sources to Interior 13 1.3 Key Techniques for Body Noise and Vibration Control 14 1.3.1 Vibration and Control of Overall Body Structure 15 1.3.2 Vibration and Sound Radiation of Body Local Structures 17 1.3.3 Sound Package for Vehicle Body 24 1.3.4 Body Noise and Vibration Sensitivity 28 1.3.5 Wind Noise and Control 32 1.3.6 Door Closing Sound Quality and Control 35 1.3.7 Squeak and Rattle of Vehicle Body 38 1.4 Noise and Vibration Control During Vehicle Development 39 1.4.1 Modal Frequency Distribution for Vehicle Body 40 1.4.2 Body NVH Target System 41 1.4.3 Execution of Body NVH Targets 42 1.5 Structure of This Book 42 2 Vibration Control of Overall Body Structure 45 2.1 Introduction 45 2.1.1 Overall Body Stiffness 45 2.1.2 Overall Body Modes 48 2.1.3 Scopes of Overall Body Vibration Research 50 2.2 Overall Body Stiffness 51 2.2.1 Body Bending Stiffness 52 2.2.2 Body Torsional Stiffness 57 2.3 Control of Overall Body Stiffness 61 2.3.1 Overall Layout of a Body Structure 62 2.3.2 Body Frame Cross‐Section and Stiffness Analysis 65 2.3.3 Joint Stiffness 67 2.3.4 Influence of Adhesive Bonding Stiffness on Overall Body Stiffness 71 2.3.5 Contribution Analysis of Beams and Joints on Overall Body Stiffness 72 2.4 Identification of Overall Body Modes 75 2.4.1 Foundation of Modal Analysis 75 2.4.2 Modal Shape and Frequency of Vehicle Body 78 2.4.3 Modal Testing for Vehicle Body 84 2.4.4 Calculation of Vehicle Body Mode 89 2.5 Control of Overall Body Modes 91 2.5.1 Separation and Decoupling of Body Modes 91 2.5.2 Planning Table/Chart of Body Modes 93 2.5.3 Control of Overall Body Modes 98 Bibliography 101 3 Noise and Vibration Control for Local Body Structures 103 3.1 Noise and Vibration Problems Caused by Vehicle Local Structures 103 3.1.1 Classification and Modes of Local Body Structures 103 3.1.2 Noise and Vibration Problems Generated by Local Modes 104 3.1.3 Control Strategy for Local Modes 111 3.2 Body Plate Vibration and Sound Radiation 112 3.2.1 Vibration of Plate Structure 113 3.2.2 Sound Radiation of Plate Structure 116 3.3 Body Acoustic Cavity Mode 120 3.3.1 Definition and Shapes of Acoustic Cavity Mode 120 3.3.2 Theoretical Analysis and Measurement of Acoustic Cavity Mode 122 3.3.3 Coupling of Acoustic Cavity Mode and Structural Mode 129 3.3.4 Control of Acoustic Cavity Mode 130 3.4 Panel Contribution Analysis 131 3.4.1 Concept of Panel Contribution 131 3.4.2 Contribution Analysis of Panel Vibration and Sound Radiation 132 3.4.3 Testing Methods for Panel Vibration and Sound Radiation 136 3.5 Damping Control for Structural Vibration and Sound Radiation 145 3.5.1 Damping Phenomenon and Description 145 3.5.2 Damping Models 146 3.5.3 Loss Factor 149 3.5.4 Characteristics of Viscoelastic Damping Materials 150 3.5.5 Classification of Body Damping Materials and Damping Structures 153 3.5.6 Measurement of Damping Loss Factor 157 3.5.7 Application of Damping Materials and Structures on Vehicle Body 159 3.6 Stiffness Control for Body Panel Vibration and Sound Radiation 162 3.6.1 Mechanism of Stiffness Control 164 3.6.2 Tuning of Plate Stiffness 166 3.6.3 Influence of Plate Stiffness Tuning on Sound Radiation 170 3.6.4 Case Study of Body Stiffness Tuning 170 3.7 Mass Control for Body Panel Vibration and Sound Radiation 175 3.7.1 Mechanism of Mass Control 175 3.7.2 Application of Mass Control 175 3.8 Damper Control for Body Vibration and Sound Radiation 179 3.8.1 Mechanism of Dynamic Damper 179 3.8.2 Application of Dynamic Damper to Attenuate Interior Booming 181 3.9 Noise and Vibration for Body Accessory Components 182 3.9.1 Bracket Mode and Control 182 3.9.2 Control of Steering System Vibration 185 3.9.3 Control of Seat Vibration 190 Bibliography 195 4 Sound Package 201 4.1 Introduction 201 4.1.1 Transfer of Airborne‐Noise to Passenger Compartment 201 4.1.2 Scopes of Sound Package Research 202 4.2 Body Sealing 203 4.2.1 Importance of Sealing 203 4.2.2 Static Sealing and Dynamic Sealing 207 4.2.3 Measurement of Static Sealing 207 4.2.4 Control of Static Sealing 210 4.3 Sound Absorptive Materials 216 4.3.1 Sound Absorption Mechanism and Sound Absorption Coefficient 216 4.3.2 Porous Sound Absorptive Material 217 4.3.3 Resonant Sound Absorption Structure 222 4.3.4 Measurement of Sound Absorption Coefficient 224 4.4 Sound Insulation Materials and Structures 229 4.4.1 Mechanism of Sound Insulation and Sound Transmission Loss 229 4.4.2 Sound Insulation of Single Plate 230 4.4.3 Sound Insulation of Double Plate 233 4.4.4 Measurement of Sound Insulation Materials 236 4.5 Application of Sound Package 240 4.5.1 Application of Sound Absorptive Materials and Structures 241 4.5.2 Application of Combination of Sound Insulation Structures and Sound Absorptive Materials 247 4.5.3 Application of Sound Baffle Material 252 4.6 Statistical Energy Analysis and Its Application 254 4.6.1 Concepts of Statistical Energy Analysis 255 4.6.2 Theory of Statistical Energy Analysis 256 4.6.3 Assumptions and Applications of Statistical Energy Analysis 258 4.6.4 Loss Factor 260 4.6.5 Input Power 263 4.6.6 Application of Statistical Energy Analysis on Vehicle Body 264 Bibliography 267 5 Vehicle Body Sensitivity Analysis and Control 273 5.1 Introduction 273 5.1.1 System and Transfer Function 273 5.1.2 Vibration and Sound Excitation Points on Vehicle Body 275 5.1.3 Response Points 278 5.1.4 Body Sensitivity 278 5.2 Source– Transfer Path–Response Model for Vehicle Body 280 5.2.1 Source–Transfer Path–Response Model 280 5.2.2 Source–Transfer Function–Vibration Model for Vehicle Body 280 5.2.3 Source−Transfer Function−Noise Model for Vehicle Body 281 5.3 Characteristics and Analysis of Noise and Vibration Sources 284 5.3.1 Excitation Characteristics of Engine and Related Systems 284 5.3.2 Excitation Characteristics of Drivetrain System 286 5.3.3 Excitation Characteristics of Tires 291 5.3.4 Excitation Characteristics of Rotary Machines 293 5.3.5 Excitation Characteristics of Random or Impulse Inputs 294 5.4 Dynamic Stiffness and Input Point Inertance 295 5.4.1 Mechanical Impedance and Mobility 295 5.4.2 Driving Point Dynamic Stiffness 296 5.4.3 IPI and Driving Point Dynamic Stiffness 298 5.4.4 Control of Driving Point Dynamic Stiffness 301 5.5 Vibration− Vibration Sensitivity and Sound−Vibration Sensitivity 304 5.5.1 Transfer Processing of Vibration Sources to Interior Vibration and Vibration−Vibration Sensitivity 304 5.5.2 Transfer Processing of Vibration Sources to Interior Noise and Sound−Vibration Sensitivity 308
• Edition: 1st
• Publisher Details: Hoboken, New Jersey : John Wiley & Sons, Inc
• Publication Date: 2018
• Extent: 1 online resource
• Subjects: 629.231; Automobiles -- Noise; Automobiles -- Vibration
• Languages: English
• ISBNs: 9781119515524; 9781119515517
• Notes: Note: Description based on CIP data; resource not viewed.
• Access Rights: Legal Deposit; Only available on premises controlled by the deposit library and to one user at any one time; The Legal Deposit Libraries (Non-Print Works) Regulations (UK).
• Access Usage: Restricted: Printing from this resource is governed by The Legal Deposit Libraries (Non-Print Works) Regulations (UK) and UK copyright law currently in force.