Single Bridge Of Hollow Rubber Spring Composite Suspension System Research

With Chinese transportation industry developing towards high speed and overloading, heavy tractor gradually aroused concentration and attention in the commercial vehicle industry with its advantage of large volume, small turning radius, low cost, high efficiency and economy. Heavy tractor will play a more and more important role in the road transportation, leading the direction of development of the commercial vehicle industry. In order to ensure driving safety and transported goods in good condition, more and more attention are paid to the relevant performance of the tractor suspension system. The suspension system is mainly to transfer the force and the torque between the wheel and the frame, to moderate impact load from the road to the frame, to recede the vibration of bearing system, to ensure the vehicles can run smoothly. Therefore, it is very necessary to carry out the study of suspension system in the research of the vehicle system dynamics. Based on the hollow rubber spring compound suspension system researched by domestic CSR Zhuzhou TMT Co. Ltd, the coupled model of the rear suspension of the automobile, the front suspension model, bridge-body model, tire model and road model are built in SIMPACK, and the coupled dynamics simulation model of the vehicle is set up on the basis of the above subsystems.At first, the sinusoidal frequency turbulence simulation is made to the hollow rubber spring compound suspension system, it is proved the good vertical stability of the system and suspension topology is stable and reliable in structure design. Then took the simulations of the pulse input and random input to the heavy tractor vehicle dynamic model, obtained the mass acceleration RMS of the body center, suspension’s vertical displacement and the hollow rubber spring’s dynamic load and analyzed how does the different speed,load state, and different road surface affect the vehicle’s running comfort. the different stiffness of hollow rubber spring on the ride comfort of vehicle is discussed. The simulation shows that the hollow rubber spring compound suspension system can make vehicle has good running comfort. In the end established finite element model of hollow rubber spring, the action of strength properties of hollow rubber spring in the static load and dynamic load are analyzed respectively. Analysis results show that under the effect of dynamic and static load, the hollow rubber spring, the strength characteristics of the hollow rubber spring compound suspension system meet the design requirements.The hollow rubber spring compound suspension system has good running comfort and structure stability through the research. It provides important reference basis for the design and has important guiding significance for the designing, developing and performance evaluation of the modern automotive suspension, which can effectively shorten the development cycle of suspension system and save research funding.