The reason of car body tilt during its operation for oval rubber spring mounted on a type of locomotive was analyzed.The problems of coordination between vertical and lateral stiffness was solved through optimization of structure on oval rubber spring.Based on the analysis of the boundary condition of operational condition and problems of the existing structure,the coordination of vertical stiffness and lateral stiffness was adjusted by design of a certain number of bottom holes and stiffness compensation with appropriate rubber hardness.By comparing the finite element simulation results of the two structures,vertical stiffness and lateral stiffness of optimized structure were well coordinated,the rubber strain was reduced by 9.1％～20.7％,the fatigue damage value was reduced by 36.6％,and service life was improved to a certain extent.Finally,Fatigue test was conducted and proved that the improvement was achieved.The structure optimization of the rubber spring was expected to meet the requirement of maintenance-free during a overhaul period,which improved the running stability and safety of the locomotive and solved problem of car body tilt.This optimization design provided de-sign experience for multi-layer rubber spring products,the layout of the bottom hole could effectively adjust ratio between vertical and lateral stiffness.With the increase of bottom hole diameter,vertical stiffness was weakened by about 2.5 to 3.5 times of the lateral stiffness.The influence of rubber hardness on vertical and lateral stiffness showed the opposite relationship,and the best design was a-chieved by those compensation.
关键词
椭圆形橡胶堆/结构优化/有限元仿真分析/疲劳试验
Key words
oval rubber spring/optimization/finite element analysis/fatigue test
维普
万方数据