Effect of bouncing and pitching on the coupled natural frequency of an automobile

Abstract EN

This paper describes a unique solution of bouncing and pitching interactions, in which it play an increasingly significant role in vehicle.

While the behavior of vibrating system has motivated numerous experimental and numerical works, very few studies have been devoted to the case of vibration of car.

This paper presents an investigation of bouncing – pitching effects, which is of strong interest for vibration of vehicle.

The prediction of the natural frequencies in the car is thus a challenging task.

This paper have a novel discussion of the dynamic behavior (natural frequencies and mode shapes) of vehicle and the relationships between the coupled natural frequency of the car.

This work is theoretical and finite element method via ANSYS software study of dynamic performance of vehicle which is consists of two masses (body of car and tire) .

The paper deals with obtaining the vibration characteristic of an automobile analyzed as system without damping due to the effect of bouncing and pitching.

The focus of the vibration analysis is to obtain the eigenvectors, and the corresponding natural frequencies of the system.

Good agreement is evident between the theoretical and finite element method in which the discrepancy between the two methods is about 0.05% for bouncing and 0.2% for pitching model.

Also, it can be deduced that the join between car and tire, the result of the natural frequencies are differed from that of the natural frequency for the individual one, in which the higher frequency is increased and decreased the less one.