Evaluation of Road Load Simulation on Rough Road Using a Full Vehicle Model (The Second Report)

- Load Prediction for Durability Using a Tire Model -

Abstract

In the evaluation of durability, multi-body simulation using a tire model is expected to enable prediction of the forces generated on the vehicle when driving over rough roads. As the durability of a vehicle depends on generated forces, the accuracy with which such forces can be predicted by the simulation is a crucial factor in assessing it. This research was focused on a tire of low aspect ration for road load prediction. The accuracy of road load simulation on curb strike and rough road with applying a normal aspect ratio tire and a low aspect ration tire was evaluated by a full vehicle model developed in a multi-body simulation. The simulation results were compared with the measurements. By evaluating the results, it was confirmed that the low aspect ratio tire model evaluated in this research had an issue for the accuracy on longitudinal forces. The cause of this issue was considered by test and simulation of static load deflection of tire itself. It was considered that tire model could not reproduce enough non-linearity of tire near rim touching.