Abstract:

This paper presents a methodology to bridge tire structural mechanics and tire dynamics. The former is the foundation of tire design which provides stress, strain and temperature fields within the tire, while the latter mainly refers to the tire external characteristic dynamics which provide force and moments for vehicle modeling. For many years, tire external dynamics and tire structural mechanics have developed along their own different tracks separately. However, in last decades the situation has been changing. On the one hand the development needs of advanced vehicle dynamics simulation and control technology makes tire modeling must consider the structural characteristics of the tire itself. On the other hand, the pressure of safety, energy conservation and environmental protection makes devel-opment of the tire must consider its dynamic mechanical properties from the beginning.
From the perspective of tire structural mechanics, due to the requirement of the high-speed driving comfort, safety and energy saving such as the provisions of the Europe tire label law, the design and de-velopment of the tire should consider more vibration, noise, rolling resistance, and so on. These are re-lated to structural dynamics problems during tire rolling process.
From the point of view of external characteristic mechanics, tires are the only parts in contact with the ground. A small piece of the interface between tire and ground determines the six component forces that can make vehicle realize a variety of motions. The properties of interface are related to the status of tires, road and vehicle and it determines many key system performances such as the handling and stability of vehicle, tire wear, road load, rolling noise, and so on.
The general tire rolling kinematic thoery will be descirbed, which gives the exact absolute slip ve-locity and acceleration in rolling tires, especially in contact patch. By using this approach, one can commbine tire structutal information and tire rigid motion to obtain the complete kinematics. Then the tire dynamical properties e.g force and moments, rolling noise, road feeling, can be analyzed in a straightforward way.
This presentation will first give a overview of tire general rolling kinematics theory, then the appli-cation of the proposed method to three important areas, i.e., tire force and moment prediction, rolling noise simulation and road feeling modeling, will be talked.
Keywords: tire structural mehanics; tire dynamics; tire design; external characteristics; tire noise; road feeling
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Biography:

Yintao Wei, Professor of Department of Automotive Engineering, Tsinghua University, Beijing, China.
Education background: 1988-1992 Harbin Institute of Technology, Bachelor; 1994-1997 Harbin Institute of Technology, PhD.
Experience: 2002.2-2011.12 Associate Professor in, Tsinghua University; 2012.1-til now, Full Professor; 2003.2-2004.3 Alexander von Humboldt fellow visiting Scholar in University of Hannover, Aachen University of Technology in Germany.
Areas of Research Interests includes Vehicle system dynamics & Tyre technology, Nonlinear FEM & optimization design, Rubber fatigue & Rubber constitutive law.