高速列车乘坐舒适度评价的概率密度演化方法

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (14) : 149-155.

论文

刘章军1,2，张传勇1,2，齐东春1,2

作者信息 +

Probability density evolution method for the ride comfort evaluation of high speed trains

LIU Zhang-jun^1,2, ZHANG Chuan-yong ^1,2, QI Dong-chun^1,2

Author information +

文章历史 +

摘要

利用平稳随机过程的谱表示-随机函数方法，结合轨道不平顺的功率谱密度，模拟生成轨道高低不平顺的代表性样本集合，实现用一个基本随机变量表达轨道不平顺随机过程的目的。以轨道高低不平顺为外部随机激励，建立了车辆-轨道耦合随机动力系统的概率密度演化分析方法，获得高速列车在轨道高低不平顺随机激励下的车体竖向加速度的丰富概率信息。同时，根据旅客乘坐舒适度的UIC513评价标准，对于有砟轨道和无砟轨道线路，计算得到高速列车在200km/h、250km/h和300km/h三种速度下的旅客乘坐舒适度。结果表明，轨道不平顺模拟的谱表示-随机函数方法与概率密度演化理论具有一致性，两者结合可为车辆-轨道耦合系统的随机动力响应提供高效精确分析方法，实现旅客乘坐舒适度的精细化计算，进而为高速列车乘坐舒适度评价提供了新途径。

Abstract

Applying the spectral representationrandom function method in dealing with stationary stochastic processes, combined with the power spectral density of track irregularity, a representative sample set of track irregularity was simulated and the object of expressing a track irregularity stochastic process by only one elementary random variable was achieved. With the track irregularity as an external random excitation, the probability density evolution method for analyzing vehicletrack coupling stochastic dynamic systems was established to obtain the rich probability information involved in the vertical accelerations of highspeed trains. At the same time, according to the UIC513 evaluation standard of passengers’ ride comfort, for both ballast track and ballastless track lines, the ride comfort of highspeed trains at three different speeds of 200 km/h, 250 km/h and 300 km/h was analyzed respectively. The results show that there is natural consistency between the spectral representationrandom function method and probability density evolution method, the combination of the two methods provides an efficient and accurate analysis method for stochastic dynamic responses of the vehicletrack coupling system, and realizes the elaborative calculation of passengers’ ride comfort, which provides a new way for the vehiclestrack coupling system response analysis and comfort evaluation of highspeed trains.

导出引用

刘章军1,2，张传勇1,2，齐东春1,2. 高速列车乘坐舒适度评价的概率密度演化方法[J]. 振动与冲击, 2018, 37(14): 149-155

LIU Zhang-jun1,2, ZHANG Chuan-yong 1,2, QI Dong-chun1,2. Probability density evolution method for the ride comfort evaluation of high speed trains[J]. Journal of Vibration and Shock, 2018, 37(14): 149-155

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