A Simulation Methodology for Tire/Road Vibration Noise analysis

摘要

A new methodology for simulating tire/road vibration noise is presented in this paper, which is is based on the Mixed Lagrange-Euler Method and Pseudo Excitation Method(PEM). A non-rotational acceleration field is constructed by mapping the acceleration of the Lagrange mesh onto the Euler mesh. Using this acceleration field as the acoustic source, the rolling noise can be predicted numerically using the Boundary Element Method (BEM) and Finite Element Method (FEM). In addition, a Pseudo Excitation Method(PEM) is proposed to simulate effect of road surface profile on the tire noise., which transfers the road elevation power spectral density(PSD) to the sum of harmonic excitation. A frequency domain analysis can be conducted to obtain the dynamical response of the tire on the real road and a sound emission analysis can be performed to get the sound field excited by road profile. In this way the tire/road vibration noise can be modeled completely.