Road Noise Control Technology C2005



Sound quality is one of the most important desired attributes for the customers, and road noise is one of the most vital factors influencing sound quality. Road noise is the major interior noise source, especially for EVs, and it is a common customer complaint. In order to improve the customers’ satisfaction and market share, almost all the OEMs have spent lots of sources on the road noise attenuation.

The instructor will cover tire structure vibration, noise induced by interaction between tire and road, tire cavity noise, suspension vibration and force identification, vehicle body structure vibration and structure-borne road noise control, sound package and air-borne road noise control.


Learning Objectives
By attending this seminar, you will be able to:
  • Describe the mechanisms of road noise generation
  • Explain the influence factors of tire structure, suspension structure and body structure on road noise and control methods
  • Identify the target system and control process of road noise

Who Should Attend
Engineers working in NVH, suspension and/or body design who are concerned with road noise and its sources would benefit from attending this course. OEM and supplier design, application and materials engineers involved in the design and manufacture of specific components and systems such as tires, suspension-related components (such as suspension rubber cover), material selection for components, would also benefit.

Prerequisites

It is recommended that participants have a previous background, education or experience in NVH or suspension design.





You must complete all course contact hours and successfully pass the learning assessment to obtain CEUs.



DAY ONE
  • Road Noise Concepts and Road Noise Generated between Tire and Road Interaction
    • Concepts of road noise and related systems
    • NVH problem generated by road noise
    • The importance of road noise
    • Characteristics of road structure
    • Vibration and sound indexes of road
    • Road spectra and analysis
    • Tire structure
    • Transmission of road noise
    • Integrated control strategy of road noise
  • Near-Field Road Noise and Far-Field Road Noise
    • Classification and characteristics of near-field road noise
    • Near-field road noise caused by air movement
    • Near-field road noise caused by tire structure vibration
    • Tire-road interaction and its influence on near-field road noise
    • Tread block design and its influence on near-field road noise
    • Influence on tire structure parameters and operating conditions on near-field road noise
    • Near-field road noise test
    • Far-field road noise
  • Tire Structure Vibration
    • Excitation sources of tire vibration
    • Tire Linear and nonlinear characteristics
    • Tire vibration models
    • Mode comparison and analysis of free tire and loaded tire
    • Transmissibility of tire structure vibration
    • Identification of tire hub force
    • Tire vibration characteristics and control methods
  • Tire Cavity Mode and Cavity Noise
    • Tire cavity mode and its impact on interior noise
    • Theoretical analysis of tire cavity mode
    • CAE analysis and measurement of tire cavity mode
    • Tire cavity mode for loaded tire
    • Coupling between tire cavity mode and structural mode
    • Tire cavity vibration transmissibility
    • Tire cavity mode control
DAY TWO
  • Vibration of Suspension System 
    • Suspension system
    • Transfer function, input and output forces of suspension system
    • Vibration transmission inside suspension system
    • Control targets and methods of suspension vibration
    • Suspension modes
    • Control of suspension integrated modes and local modes
    • Bushing vibration isolation analysis
    • Vibration isolation control of suspension system
  • Identification of Suspension Transmitted Force and Control
    • Suspension force and identification
    • Inverse matrix analysis
    • Force identification by multi-reference and principal component analysis
    • Numerical and experimental hybrid model of suspension system
  • Transmission Mechanism of Road Noise
    • Analysis of interior road noise characteristics
    • Transmission paths of air-borne and structure-borne road noise
    • Identification of road noise transmission paths
    • Transmission path identification of road noise under operating condition
    • Multiple coherent identification
  • Control of Vehicle Body and Sound Package to Attenuate Road Noise
    • Air-borne road noise and sound package
    • Sound absorption and sound insulation control of vehicle body
    • Structure-borne road noise and body structure control
    • Body structure-borne sound transfer function and control
    • Control of vehicle body beam
    • Control of body panel structure
    • Decoupling control of body panel structure mode and body cavity mode




Jian Pang

Dr. Jian Pang is the Vice General Manager of Changan Auto Global R&D Centre since 2008. Prior positions include: a technical specialist at Stewart & Steven Service, Inc. and a senior engineer at Ford Motor Company. Dr. Pang has over 30 years’ experience in noise and vibration control engineering, especially in vehicle engineering. He published four technical books including "Vehicle Body Noise and Vibration Control" by Wiley, two literature books, and over 80 papers. He serves as the vice director of China National Key Lab of Vehicle NVH and Safety, the leader of OICA China Noise Group, vice chairman of China NVH society, guest professor of Tong Ji University and Chongqing University and was a previous chairman of NVH Technical Committee of FISITA (World Automotive Engineer Congress). He received his Ph.D. degree in mechanical engineering from the University of Oklahoma and his M.S. from Shanghai Jiao Tong University.

Duration: 2 Days
CEUs: 1.3

Format: Classroom

Event ID: 6892

Location: Shanghai, China

Session Info:

8:30 a.m. - 4:30 p.m.


Fees: $1299.00

If paying by any other method or if you have general enquiries, please contact SAE Customer Service.

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