Dynamics characteristic study of the visco-elastic suspension system of construction vehicles

Due to the environmental protection laws and regulations being strict day by day now, how to resolve the problems of serious vibration and impact construction vehicles, the poor driving comfortableness and the noise pollution occurring in the vehicles, have become a new urgent task, which affects the development of the heavy duty construction vehicles. The new visco-elastic suspension can not only buffer serious vibration and impact, but also dissipate most of vibration and impact energy into heat, which improves the driving and working condition of the vehicle. However, because of the complex structure of viscoelastic suspensions used in construction vehicles, it is considerable difficult to make model and analyse the characteristics of parameters. In the paper, the semi-car model of tracked vehicle suspension system is built in accordance with the visco-elastic suspension system of structural characteristics and the feature of components. The characteristics of stiffness-damping of suspension dampers is studied by using finite element. And the loading of suspension is analyzed by applying the loading of tracked pin. Lastly, for the example of a 246 kW tracked tractor, the dynamic responding of whole machine is researched in representative working condition. The results show that the model can better reflect the characteristics of vibration damping reduction about the visco-elastic suspension system. (4 pages)

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