摘要
轨道车辆悬挂参数对车辆运行平稳性和稳定性均具有重要影响,对悬挂参数进行多目标优化能够改善车辆的综合动力学性能。选取对车辆运行平稳性与运动稳定性均具有较大影响的悬挂参数为变量参数,构建面向车辆横向Sperling指标、脱轨系数与轮重减载率的Kriging代理模型、二阶RSM(Response Surface Method)模型和RBF(Radial Basis Function)模型。以R2决定系数为拟合精度衡量指标,选择具有最高拟合精度的3类代理模型构成拟合车辆动力学性能指标的混合代理模型。在此基础上,以构建的混合代理模型为目标函数,建立轨道车辆悬挂参数的多目标优化模型。使用NSGA-II算法寻优计算获得悬挂参数的优化值。轨道车辆多体动力学模型仿真计算结果表明:对悬挂参数优化后,车辆的运行平稳性与运动稳定性均得到明显改善。
Both the riding quality and traveling stability of the rail vehicle are affected by the suspension parame-ters , and the comprehensive dynamics performance of the rail vehicle can be improved by the multi-objective op-timization of the suspension parameters. The Kriging, second order response surface and RBF surrogate models of the lateral Sperling index, derailment coefficient and reduction ratio of wheel load are constructed. In these mod-els, design variables are regarded as suspension parameters that affect both the riding quality and traveling stabil-ity. Three kinds of surrogate models with the highest fitting accuracy on the corresponding dynamics index are se-lected to establish the hybrid surrogate model based on the coefficients of determination （ R2 ） . On this basis, the multi-objective optimization model of suspension parameters is established based on the objective function con-structing with hybrid surrogate model. Then, the optimal values of suspension parameters are obtained by using the NSGA-II algorithm. The multi-body dynamics simulation results indicate that both of the riding quality and traveling stability will improve significantly after the optimization of the suspension parameters.
出处
《铁道科学与工程学报》
CAS
CSCD
北大核心
2016年第10期2056-2063,共8页
Journal of Railway Science and Engineering
基金
西京学院科研基金资助项目(XJ130238)
国家自然科学基金资助项目(51405516)
作者简介
通讯作者：杨岳（1962-）,男,湖南桃源人,教授,博士,从事轨道交通设备数字化设计与制造研究;E-mail：yangyue@csu.edu.cn
