MODAL ANALYSIS OF 'TONG GONG' CROSS COUNTRY VEHICLE

摘要

This paper deals with the experimental modal analysis of the body and frame of "Tong Gong" cross country vehicle carried out on HP3562A Dynamic Signal Analyzer by using two kinds of excitations, impulse excitation and random excitation. The experimental results show that the conclusions of these two methods are quite consistent, that is, smoothness and steadiness of the vehicle is rather good. Moreover, the dynamic behavior of the vehicle after improvement is better than before improvement, because vibration has been diminished. By means of sensitivity analysis, it has been found out that the rigidity of this vehicle is more than enough, so it points out the direction of further optimization design in the future. Finally, it also shows that the software developed in our country can replace the import software gradually.