Study on Vibration Characteristics for Vehicle Inner Doors

Abstract

It has been easy to deformation for car doors which opened and closed parts of a vehicle to withstanding various loads. Not only affected the car's appearance and degree of opening, but also deformation increased when subjected to collision. Therefore, it is great significance to internal board dynamic design of the car safety through dynamic analysis of the key pieces of the door to access to inner door panel features. In the paper, the method based on the calculation mode is proposed to analyses the dynamic characteristic of the car doors. The modal analysis of the inner door panel is respectively the inner door panel and the circumference of the fixed constraint on the free-state. The modal parameters and the mode shapes are calculated through finite element analysis. According to these FEM calculating results, the low-order natural frequencies and modal vibration shapes of the inner door panel are computed and identified on the two states. On the basis of these modal parameters, the faults of the inner door panel are shown and its weak points of the design are illustrated. The reason for deformation is analyzed and relevant measures employed to reduce faults are proposed. These improvements can guarantee the normal work of the tool cutter.