介绍了三种轨道不平顺的模拟方法。
列车荷载分为两部分：车体轴重和轨道不平顺引起的轮轨动力作用力。
The source of vibration excitation is divided into two components: the axle load and the roughness-induced dynamic loads.
轨道不平顺是引起车体振动加速度、轮轨作用力和轮轨噪声增大的主要因素之一。
Track irregularity is one of the factors that make the increase of car body vibration, wheel-rail interaction force and wheel-rail noise.
研究轨道不平顺，对于车辆、线路的设计以及轨道状态的科学评定都具有重要意义。
Study on track irregularity is valuable for designing of vehicle and the track and scientific evaluation of the track status.
轨道不平顺最大值用于紧急补修评价指标，区段的标准差用于大型养路机作业的评价指标。
Maximum track irregularity is the evaluate index in emergency maintenance and standard deviation of section track irregularity is the evaluate index in track maintenance machine work.
研究目的：为了研究轨道不平顺对轮轨作用力的影响，从而为钢轨焊接接头不平顺限值提供技术依据。
Research purposes: By analyzing the effect on impact force between wheel and rail by track irregularity, technical evidences on limit of irregularity on rail welded joints are provided.
研究目的：为了研究轨道不平顺对轮轨作用力的影响，从而为钢轨焊接接头不平顺限值提供技术依据。
Using this model, the dynamic responses of the rail joints are calculated, which provides the theoretical basis for raising speed of Jing Jiu Railway.
为获得各轮轴处轨道不平顺，用于列车-桥梁振动控制和随机振动分析，研究了轨道不平顺的模拟方法。
To obtain rail irregularity samples for train-bridge vibration control and stochastic analyses, a simulation method of irregularities at all axles of a train was investigated.
为实现高效的轨道不平顺养护维修，建立最优养护维修计划模型和采用大型养路机械进行作业是十分重要的。
In order to realize efficient maintenance of track irregularity, it is necessary to establish the optimized maintenance plan model and adopt large scale machineries to maintain railway tracks.
在已有轨道不平顺和轨道谱研究成果的基础上，从接触网不平顺检测数据的时频分析方面对接触网不平顺进行了研究。
The catenary irregularity is researched from time-frequency analysis of the data detected based on existing research results of track irregularity and track spectrum.
为了使客车和货车都能在同一线路上安全、平稳地运行，则必须对轨道不平顺与车辆运行平稳性和安全性之间的关系进行研究。
To ensure safe and stabile running of both passenger and freight trains on the same line, the relationship between train running safety and stability and track irregularities must be studied.
轨道几何不平顺为平稳的正态分布和各态历经的随机变量。
The track geometry irregularity is a stable normal distribution and state-history random variable.
提出了考虑轨道高低不平顺时进行车桥耦合系统垂向非平稳随机振动分析的新方法。
A new method for a vertical non-stationary random vibration analysis of vehicle-bridge systems subjected to track irregularity excitations is proposed.
国内外在列车-轨道时变系统横向振动计算中，大多采用轨道横向不平顺作为列车-桥梁(轨道)时变系统横向振动的激振源。
The transverse track irregularity is mostly treated as the exciting source of transverse vibration of train-bridge (or track) time-varying system at home and abroad.
论文重点分析了车辆运行速度、轮轨摩擦系数、车辆载重、轨道几何不平顺、偏载、轨距大小、车轮踏面形状等因素对脱轨的影响。
The influence of train running speed, wheel-rail friction coefficient, vehicle load, track geometric irregularity, partly load, gauge and the shape of wheel tread on derailment was emphasized.
利用三角级数法模拟了轨道的不平顺，采用列车编组和桥梁组合的模型，建立了车桥耦合振动方程。
By simulating the track irregularities with trigonometric series method, the train-bridge coupling vibration equations are established based on the combined modal of train formation and the bridge.
同时，采用模拟与实测两种不平顺样本的计算结果表明，本文采用功率谱密度函数的模拟方法可以基本反映轨道的实际不平顺情况。
The calculation results using simulated and measured irregularity indicate that the power spectral density function and the simulated method used here can reflect true condition of rail.
为了得到合适的接触网不平顺功率谱模型，对轨道谱模型进行了深入的分析。
The track spectrum model is analyzed deeply to obtain appropriate catenary irregularity power spectrum model.
利用三角级数法模拟了轨道的不平顺，采用列车编组和桥梁组合的模型，建立了车桥耦合振动方程。
By examining the test results of vibration for a few Bridges, it is found that train formation has a strong effect on bridge vibration responses.
提出了考虑轨道高低不平顺时进行车桥耦合系统垂向非平稳随机振动分析的新方法。
Nonstationary random vibration of vehicle systems with uniform variable speed is discussed in this paper.
结果表明，两者图形趋势较为一致，说明用该模型预测轨道高低不平顺发展趋势是可行的。
It was pointed that the figures of forecast and inspection are similar. The result indicates that it is feasible using the model to forecast longitudinal ir…
结果表明，两者图形趋势较为一致，说明用该模型预测轨道高低不平顺发展趋势是可行的。
It was pointed that the figures of forecast and inspection are similar. The result indicates that it is feasible using the model to forecast longitudinal ir…
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