基于耦合模型的轨道特种车辆悬架参数优化

基于车辆 轨道耦合动力学理论，建立了路轨两用消防车在轨道上行驶的车辆 轨道耦合模型，并与传统轨道车辆模型进行比较，通过实车试验验证了车辆 轨道耦合模型的正确性. 在此基础上，采用统一目标函数法对车辆悬架参数进行优化. 仿真结果表明，该优化设计方法使得车身加速度均方根值减小了626%，次级悬架动行程均方根值减小了542%，轮轨力均方根值减小了681%，提高了车辆平稳性，降低了悬架行程，削弱了轮轨间动作用力.

Optimization of Suspension Parameters Based on Vehicle-Track Coupled Model for a Special Railway Vehicle

Based on the vehicle-track coupled dynamics,the vehicle-track coupled model for the road-rail fire fighting vehicle moving on the track was established and was compared with the traditional railway vehicle model.For the validation of the two models,field experiments were made.The comparisons between the experimental test results and numeral simulation results indicate that the vehicle-track coupled model is better in accordance with the reality than the traditional railway vehicle model.Based on the vehicle-track model,the unified objective function method was used for the optimization of suspension parameters.The optimization results indicate that root-mean-square values of car body acceleration,dynamic travel of secondary suspension and wheel-rail force are reduced by 6.26%,5.42% and 6.81%,respectively.Consequently,the riding quality is significantly improved,the dynamic travel of secondary suspension is greatly shortened,and the influence of wheel-rail dynamic interactions on the damage and deform of track structures is remarkably decreased.