关键词: 车辆工程, 轮胎模型, 纵滑特性

Abstract: On the basis of the steadystate semiempirical model of the tire and the concepts of the relaxation length and the effective slip ratio, a nonsteady semiempirical model to express the tire longitudinalslip response to the lowfrequency input of the transient vertical load and transient slip ratio was presented. In this model, the dynamic response of the tire was expressed approximately by a series connection of a spring(to represent the translational elasticity) and a steadystate contact model(to represent the contact between tire and road surfaces). The validation shows that the simulation of the tire model agrees with the testing results. The suggested model is compatible with the theoretical boundary conditions, can express the nonsteady longitudinalslip characteristics of the tire, and is characterized by the high precision, the formulation simplicity and the easy application to the vehicle dynamics.

Key words: vehicle engineering, tire model, longitudinalslip characteristic