随机车轮不圆顺及车辆参数对轨道频域振动响应影响分析

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (22) : 104-111.

论文

李明航1，马蒙1，谭新宇1，张厚贵2，刘卫丰1

作者信息 +

Influences of random wheel irregularity and vehicle parameters on the vibration of track in frequency domain

LI Minghang1，MA Meng1，TAN Xinyu1，ZHANG Hougui2，LIU Weifeng1

Author information +

文章历史 +

摘要

列车引起轨道振动响应受车辆参数及车轮养护维修状态差异等因素影响，短时间内不同地铁列车通过某一固定测试断面引起的振动响应呈现显著的不确定性，且在频域内不同频段的离散特征差异明显。为研究车轮不圆顺及车辆参数随机性对轨道振动响应的影响，以不同运营里程地铁列车车轮不圆顺实测样本为基础，构建了随机车轮不圆顺谱；测量了某地铁隧道区间轨道动态不平顺、钢轨表面粗糙度及轨道垂向振动响应；基于车-轨耦合频域解析模型，采用随机模拟法计算了随机车辆参数及随机车轮不圆顺联合作用下的轨道频域振动响应。研究发现：采用实测车轮不圆顺耦合轨道不平顺作为激励，计算获得频域轨道振动响应与测试值吻合良好，8~200 Hz的平均绝对百分比误差为2.4%；随机车辆参数、随机车轮不圆顺耦合实测轨道不平顺作用下，8 Hz以下的振动响应未出现显著的离散；16 Hz以上的振动加速度级离散明显，并均呈现正偏态分布特征；63 Hz以上频段分频振动加速度级离散超过20 dB。

Abstract

Train-induced track vibrations are affected by various factors, such as the difference of vehicle parameters and wheel maintenance status. The vibration responses induced by different metro trains passing through a fixed measurement section exhibit significant uncertainty, and the dispersion characteristics of different frequency bands differ significantly in the frequency domain. In order to analyse the influence of random wheel irregularities and random vehicle parameters on the track vibration in the frequency domain, the power spectral density model of random wheel irregularities was constructed based on the measured wheel out-of-round samples of typical metro trains with different operation mileage. The dynamic track irregularities, rail roughness and vertical vibration acceleration of track in a metro running tunnel were also tested in-situ. Based on the train-track coupled analytical model in the frequency domain, the track dynamic responses under the combination of random vehicle parameters and random wheels irregularities were calculated by the random simulation method. The research results indicate that, the frequency-domain track vibration responses are in good agreement with the measured values, and the average absolute percentage error of between 8 Hz and 200 Hz is only 2.4%. Under the influence of random vehicle parameters and random wheels irregularities power spectral density coupling measured track irregularity, there is no significant dispersion of vibration response below 8 Hz. The vibration acceleration levels above 16 Hz are obviously discrete and show normal skew distribution characteristics. The differences of frequency divided vibration levels above 63 Hz are more than 20 dB.

导出引用

李明航1，马蒙1，谭新宇1，张厚贵2，刘卫丰1. 随机车轮不圆顺及车辆参数对轨道频域振动响应影响分析[J]. 振动与冲击, 2021, 40(22): 104-111

LI Minghang1，MA Meng1，TAN Xinyu1，ZHANG Hougui2，LIU Weifeng1. Influences of random wheel irregularity and vehicle parameters on the vibration of track in frequency domain[J]. Journal of Vibration and Shock, 2021, 40(22): 104-111

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