kCA法を用いた接地時のタイヤ振動解析

抄録

Modeling the road contact condition is an important issue because tires are used in contact with the road surface. The Receptance method, which derives the frequency equation from the boundary conditions at the coupled degrees of freedom, has been proposed for tire contact problems. However, the Receptance method cannot be applied to models with multiple coupled degrees of freedom. The Receptance method is a type of frequency based substructuring (FBS). In this study, we propose a ground vibration analysis method that applies the kernel Compliance Analysis (kCA) method, a type of FBS, to a three-dimensional elastic ring model including a contact spring that simulates tread rubber. First, a method for calculating eigenfrequencies based on eigenvalue analysis of the self-compliance matrix of the coupled degrees of freedom is presented. The validity of the proposed method is demonstrated by calculating the natural frequencies of the tire during ground contact using the model parameters obtained under ungrounded conditions and comparing them with experimental results.