On the Dynamics of Rolling Tires in Contact with Rough Road Surfaces

Abstract

AbstractFor the reduction of traffic noise significant progress has been achieved for the main engine of motor vehicles so far. Meanwhile the rolling noise of tires is the main source at speeds above 40 km/h for passenger cars and 60 km/h for trucks. So there is need for a simulation procedure of rolling tire dynamics and sound radiation [1].In a nonlinear steady state rolling analysis the deformation of the tire in contact with a plane road is computed. The next step is the eigenvalue analysis of the gyroscopic system yielding complex eigenvectors. The modal space of the tire system is excited by surface textures of the road in the contact region in a deterministic description. Modal superposition results in the dynamic response of the system in dependance of the excitation function. Additionally, the normal velocities of the tire surface are used as boundary conditions for the acoustic simulation of the sound pressure field. With these steps it is possible to determine and optimize the characteristics of tire structures with respect to lower noise levels for virtual prototyping. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)