Analysis of Coach-Body Dynamic Performance

The finite element model of the passenger vehicle structure is established with its structure as an example.Dynamic characteristics and harmonious response analysis of the whole vehicle model are made.The results show that during the 13th step vibration and 16th step vibration of the vehicle body,the comparatively serious deformation happens in the middle and back section of the vehicle structure model,and particularly in the back section of engine bottom structure.When the outer stimulant frequency is close to that of the vehicle body,response happens.With the outer stimulant frequency at 50,91 Hz,restively large swing happens in the middle-back and back section of the vehicle structure model,and this swing may cause the response of the vehicle body structure.