基于车辆响应计算的地铁轨道平顺状态评价

摘要

The assessment method for track condition is based on pure statistical results of parameters overrun at present,without considering wheel-rail relationship and vhicle response.According to this situation,this paper proposed an assessement method for metro track condition,which was based on response computation of vehicle dynamics.This method introduced pseudo excitation method to calculate response spectrum of car body through vehicle dynamics model and calculated ride index from response spectrum.Ride index can be used to evaluate condition of track irregularities when the parameters of vehicle dynamics is stationary.Experiment results show that this method can be used to evaluate track condition.%针对目前轨道检测数据以幅值超限统计的方式评价轨道平顺状态而未考虑轮轨关系及车辆实际响应的问题,提出一种基于车辆响应计算的地铁轨道平顺状态评价方法.该方法引入随机振动虚拟激励法对车辆动力学模型的响应谱进行计算,再由响应谱计算得到平稳性指标,指出在车辆动力学参数稳定状态下,平稳性指标可用于对轨道平顺状态的判定.不同车速下高级别轨道谱的平稳性指标均优于低级别轨道谱,结果表明该方法可对轨道的整体状态进行量化评价.该算法可用于深入分析轨检数据,并为轨道状态评价提供新的思路.