Numerical simulation of radiation noise of 3-D smooth tire using the rebound excitation force at the bending front

This paper is concerned with the numerical prediction of the vibration-induced radiation noise of main grooved smooth tire. The tire body is to be vibrated by the ground impact force at the bending front within the contact patch, which becomes a main source of tire radiation noise. Tire radiation noise is a physical phenomenon associated with rolling tire so that its numerical prediction virtually requires the structural vibration data in the state of rolling. But, such vibration data are not only highly time consuming to obtain, but the rolling tire model is not applicable to commercial acoustics software. Hence, in the current study, the structural vibration data is obtained by applying the rebound excitation force which is obtained by the dynamic rolling analysis to the stationary tire model. The vibro-acoustic analysis is analyzed by combining the finite element and boundary element methods. The present method is illustrated through the numerical experiment and verified from the comparison with the experiment.