Chapter
1.3.1 Vibration and Control of Overall Body Structure
1.3.2 Vibration and Sound Radiation of Body Local Structures
1.3.3 Sound Package for Vehicle Body
1.3.4 Body Noise and Vibration Sensitivity
1.3.5 Wind Noise and Control
1.3.6 Door Closing Sound Quality and Control
1.3.7 Squeak and Rattle of Vehicle Body
1.4 Noise and Vibration Control During Vehicle Development
1.4.1 Modal Frequency Distribution for Vehicle Body
1.4.2 Body NVH Target System
1.4.3 Execution of Body NVH Targets
1.5 Structure of This Book
Chapter 2 Vibration Control of Overall Body Structure
2.1.1 Overall Body Stiffness
2.1.3 Scopes of Overall Body Vibration Research
2.2 Overall Body Stiffness
2.2.1 Body Bending Stiffness
2.2.2 Body Torsional Stiffness
2.3 Control of Overall Body Stiffness
2.3.1 Overall Layout of a Body Structure
2.3.2 Body Frame Cross‐Section and Stiffness Analysis
2.3.4 Influence of Adhesive Bonding Stiffness on Overall Body Stiffness
2.3.5 Contribution Analysis of Beams and Joints on Overall Body Stiffness
2.4 Identification of Overall Body Modes
2.4.1 Foundation of Modal Analysis
2.4.2 Modal Shape and Frequency of Vehicle Body
2.4.3 Modal Testing for Vehicle Body
2.4.4 Calculation of Vehicle Body Mode
2.5 Control of Overall Body Modes
2.5.1 Separation and Decoupling of Body Modes
2.5.2 Planning Table/Chart of Body Modes
2.5.3 Control of Overall Body Modes
Chapter 3 Noise and Vibration Control for Local Body Structures
3.1 Noise and Vibration Problems Caused by Vehicle Local Structures
3.1.1 Classification and Modes of Local Body Structures
3.1.2 Noise and Vibration Problems Generated by Local Modes
3.1.3 Control Strategy for Local Modes
3.2 Body Plate Vibration and Sound Radiation
3.2.1 Vibration of Plate Structure
3.2.2 Sound Radiation of Plate Structure
3.3 Body Acoustic Cavity Mode
3.3.1 Definition and Shapes of Acoustic Cavity Mode
3.3.2 Theoretical Analysis and Measurement of Acoustic Cavity Mode
3.3.3 Coupling of Acoustic Cavity Mode and Structural Mode
3.3.4 Control of Acoustic Cavity Mode
3.4 Panel Contribution Analysis
3.4.1 Concept of Panel Contribution
3.4.2 Contribution Analysis of Panel Vibration and Sound Radiation
3.4.3 Testing Methods for Panel Vibration and Sound Radiation
3.5 Damping Control for Structural Vibration and Sound Radiation
3.5.1 Damping Phenomenon and Description
3.5.4 Characteristics of Viscoelastic Damping Materials
3.5.5 Classification of Body Damping Materials and Damping Structures
3.5.6 Measurement of Damping Loss Factor
3.5.7 Application of Damping Materials and Structures on Vehicle Body
3.6 Stiffness Control for Body Panel Vibration and Sound Radiation
3.6.1 Mechanism of Stiffness Control
3.6.2 Tuning of Plate Stiffness
3.6.3 Influence of Plate Stiffness Tuning on Sound Radiation
3.6.4 Case Study of Body Stiffness Tuning
3.7 Mass Control for Body Panel Vibration and Sound Radiation
3.7.1 Mechanism of Mass Control
3.7.2 Application of Mass Control
3.8 Damper Control for Body Vibration and Sound Radiation
3.8.1 Mechanism of Dynamic Damper
3.8.2 Application of Dynamic Damper to Attenuate Interior Booming
3.9 Noise and Vibration for Body Accessory Components
3.9.1 Bracket Mode and Control
3.9.2 Control of Steering System Vibration
3.9.3 Control of Seat Vibration
4.1.1 Transfer of Airborne‐Noise to Passenger Compartment
4.1.2 Scopes of Sound Package Research
4.2.1 Importance of Sealing
4.2.2 Static Sealing and Dynamic Sealing
4.2.3 Measurement of Static Sealing
4.2.4 Control of Static Sealing
4.3 Sound Absorptive Materials
4.3.1 Sound Absorption Mechanism and Sound Absorption Coefficient
4.3.2 Porous Sound Absorptive Material
4.3.3 Resonant Sound Absorption Structure
4.3.4 Measurement of Sound Absorption Coefficient
4.4 Sound Insulation Materials and Structures
4.4.1 Mechanism of Sound Insulation and Sound Transmission Loss
4.4.2 Sound Insulation of Single Plate
4.4.3 Sound Insulation of Double Plate
4.4.4 Measurement of Sound Insulation Materials
4.5 Application of Sound Package
4.5.1 Application of Sound Absorptive Materials and Structures
4.5.2 Application of Combination of Sound Insulation Structures and Sound Absorptive Materials
4.5.3 Application of Sound Baffle Material
4.6 Statistical Energy Analysis and Its Application
4.6.1 Concepts of Statistical Energy Analysis
4.6.2 Theory of Statistical Energy Analysis
4.6.3 Assumptions and Applications of Statistical Energy Analysis
4.6.6 Application of Statistical Energy Analysis on Vehicle Body
Chapter 5 Vehicle Body Sensitivity Analysis and Control
5.1.1 System and Transfer Function
5.1.2 Vibration and Sound Excitation Points on Vehicle Body
5.2 Source–Transfer Path–Response Model for Vehicle Body
5.2.1 Source–Transfer Path–Response Model
5.2.2 Source–Transfer Function–Vibration Model for Vehicle Body
5.2.3 Source−Transfer Function−Noise Model for Vehicle Body
5.3 Characteristics and Analysis of Noise and Vibration Sources
5.3.1 Excitation Characteristics of Engine and Related Systems
5.3.2 Excitation Characteristics of Drivetrain System
5.3.3 Excitation Characteristics of Tires
5.3.4 Excitation Characteristics of Rotary Machines
5.3.5 Excitation Characteristics of Random or Impulse Inputs
5.4 Dynamic Stiffness and Input Point Inertance
5.4.1 Mechanical Impedance and Mobility
5.4.2 Driving Point Dynamic Stiffness
5.4.3 IPI and Driving Point Dynamic Stiffness
5.4.4 Control of Driving Point Dynamic Stiffness
5.5 Vibration−Vibration Sensitivity and Sound−Vibration Sensitivity
5.5.1 Transfer Processing of Vibration Sources to Interior Vibration and Vibration−Vibration Sensitivity
5.5.2 Transfer Processing of Vibration Sources to Interior Noise and Sound−Vibration Sensitivity
5.5.3 Sensitivity Control
5.5.4 Sensitivity Targets
5.6 Sound−Sound Sensitivity and Control
5.6.1 Sound Transmission from Outside Body to Interior
5.6.2 Expression of Sound−Sound Sensitivity
5.6.3 Targets and Control of Sound−Sound Sensitivity
6.1.1 Problems Induced by Wind Noise
6.1.2 Sound Sources and Classification of Wind Noise
6.2 Mechanism of Wind Noise
6.3 Control Strategy for Wind Noise
6.3.1 Transfer Paths of Wind Noise
6.3.2 Control Strategy of Wind Noise
6.4 Body Overall Styling and Wind Noise Control
6.4.1 Ideal Body Overall Styling
6.4.2 Design of Transition Region between Front Grill and Engine Hook
6.4.3 Design in Area between Engine Hood and Front Windshield
6.4.4 Design of A‐Pillar Area
6.4.5 Design of Transition Area of Roof, Rear Windshield, and Trunk Lid
6.4.7 Design in an Area of Wheelhouse and Body Side Panel
6.5 Body Local Design and Wind Noise Control
6.5.1 Principles for Body Local Structure Design
6.5.2 Design of Side Mirror and Its Connection with Body
6.5.3 Sunroof Design and Wind Noise Control
6.5.4 Antenna Design and Wind Noise Control
6.5.5 Design of Roof Luggage Rack
6.5.6 Control of Other Appendages and Outside Cavity
6.6 Dynamic Sealing and Control
6.6.1 Dynamic Sealing and Its Importance
6.6.2 Expression for Dynamic Sealing
6.6.3 Dynamic Sealing between Door and Body
6.6.4 Control of Dynamic Sealing
6.7 Measurement and Evaluation of Wind Noise
6.7.1 Wind Noise Testing in Wind Tunnel
6.7.2 Wind Noise Testing on Road
6.7.3 Evaluation of Wind Noise
6.8 Analysis of Wind Noise
6.8.1 Relationship Between Aerodynamic Acoustics and Classical Acoustics
6.8.2 Lighthill Acoustic Analogy Theory
6.8.3 Lighthill‐Curl Acoustic Analogy Theory
6.8.4 Solution of Aerodynamic Equations
6.8.5 Simulation of Wind Noise
Chapter 7 Door Closing Sound Quality
7.1 Vehicle Sound Quality
7.1.1 Concept of Sound Quality
7.1.2 Automotive Sound Quality
7.1.3 Importance of Automotive Sound Quality
7.1.4 Scope of Sound Quality
7.2 Evaluation Indexes of Sound Quality
7.2.1 Description of Psychoacoustics
7.2.2 Evaluation Indexes of Psychoacoustics
7.2.6 Modulation, Fluctuation, and Roughness
7.3 Evaluation Indexes of Automotive Sound Quality
7.3.1 Classification of Automotive Sound Quality
7.3.2 Indexes Used to Describe Automotive Sound Quality
7.3.3 Indexes Used to Describe System Sound Quality
7.4 Evaluation of Door Closing Sound Quality
7.4.1 Importance of Door Closing Sound Quality
7.4.2 Subjective Evaluation of Door Closing Sound Quality
7.4.3 Objective Evaluation of Door Closing Sound Quality
7.4.4 Relation between Subjective Evaluation and Objective Evaluation
7.5 Structure and Noise Source of Door Closing System
7.5.1 Structure of Door Closing System
7.5.2 Noise Sources of Door Closing
7.6 Control of Door Closing Sound Quality
7.6.1 Control of Door Panel Structure
7.6.2 Control of Door Lock
7.6.3 Control of Sealing System
7.7 Design Procedure and Example Analysis for Door Closing Sound Quality
7.7.1 Design Procedure for Door Closing Sound Quality
7.7.2 Analysis of Factors Influencing on Loudness, Sharpness, and Ring‐Down
7.7.3 Example Analysis of Door Closing Sound Quality
7.8 Sound Quality for Other Body Components
Chapter 8 Squeak and Rattle Control in Vehicle Body
8.1.1 What Is Squeak and Rattle?
8.1.2 Components Generating Squeak and Rattle
8.1.3 Importance of Squeak and Rattle
8.1.4 Mechanism of Squeak and Rattle
8.1.5 Identification and Control of Squeak and Rattle
8.2 Mechanism and Influence Factors of Squeak
8.2.1 Mechanism of Squeak
8.2.2 Factors Influencing Squeak
8.3 Mechanism and Influence Factors of Rattle
8.3.1 Mechanism of Rattle
8.3.2 Factors Influencing Rattle
8.4 CAE Analysis of Squeak and Rattle
8.4.1 Analysis of Stiffness, Mode, and Deformation of Body and Door
8.4.2 Modal Analysis of Body Subsystems
8.4.3 Sensitivity Analysis of Squeak and Rattle
8.4.4 Dynamic Response Analysis of Squeak and Rattle
8.5 Subjective Evaluation and Testing of Squeak and Rattle
8.5.1 Subjective Identification and Evaluation of Squeak and Rattle
8.5.2 Objective Testing and Analysis of Squeak and Rattle
8.6 Control of Body Squeak and Rattle
8.6.1 Control Strategy during Vehicle Development
8.6.2 Body Structure‐Integrated Design and S&&R Control
8.6.3 DMU Checking for Body S&&R Prevention
8.6.4 Matching of Material Friction Pairs
8.6.5 Control of Manufacture Processes
8.6.6 Squeak and Rattle Issues for High Mileage Vehicle
8.6.7 Squeak and Rattle at High Mileage
Chapter 9 Targets for Body Noise and Vibration
9.1 Target System for Vehicle Noise and Vibration
9.1.1 Period for Vehicle Development and Targets
9.1.2 Factors Influencing on Target Setting
9.1.3 Principles of Target Setting and Cascading
9.1.4 Principles of Modal Separation
9.1.5 Target System of Body NVH
9.2 NVH Targets for Vehicle‐Level Body
9.2.1 Vehicle‐Level Body NVH Targets
9.2.2 Vibration Targets for Vehicle‐Level Body
9.2.3 Noise Targets for Vehicle‐Level Body
9.3 NVH Targets for Trimmed Body
9.3.1 NVH Characteristics of Trimmed Body
9.3.2 Vibration Targets of Trimmed Body
9.3.3 Noise Targets for Trimmed Body
9.4 NVH Targets for Body‐in‐White
9.4.1 NVH Characteristics of BIW
9.4.2 Vibration Targets of BIW
9.4.3 Noise Target of BIW
9.5 NVH Targets for Body Components
9.5.1 Component‐Level Vibration Targets
9.5.2 Component‐Level Noise Target
9.5.3 Noise and Vibration Targets of Door
9.6 Execution and Realization of Body Targets
9.6.1 Control at Phase of Target Setting and Cascading
9.6.2 Target Checking at Milestones
9.6.3 CAE Analysis and DMU Checking
9.6.4 NVH Control for BIW
9.6.5 NVH Control for Trimmed Body and Full Vehicle
Noise and Vibration Control in Automotive Bodies
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
