轨道短波不平顺数值模拟新方法

李再帏; 雷晓燕; 高亮

doi:10.19818/j.cnki.1671-1637.2016.01.005

轨道短波不平顺数值模拟新方法

doi: 10.19818/j.cnki.1671-1637.2016.01.005

李再帏^{1, 2, 3,},
雷晓燕²,
高亮³

1.
上海工程技术大学城市轨道交通学院, 上海 201620
2.
华东交通大学铁路环境振动与噪声教育部工程研究中心, 江西南昌 330013
3.
北京交通大学土木建筑工程学院, 北京 100044

基金项目:

国家自然科学基金项目 51478184

国家自然科学基金项目 51478258

详细信息

作者简介:
李再帏(1983-), 男, 吉林大安人, 上海工程技术大学副教授, 工学博士, 从事轨道动力学研究

中图分类号: U216.3
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- 被引次数: 0
出版历程
- 收稿日期: 2015-08-30
- 刊出日期: 2016-02-25

New numerical simulation method of shortwave track irregularity

LI Zai-wei^{1, 2, 3
,},
LEI Xiao-yan²,
GAO Liang³

1.
School of Urban Rail Transportation, Shanghai University of Engineering Science, Shanghai 201620, China
2.
Engineering Research Center of Railway Environmental Vibration and Noise of Ministry of Education, East China Jiaotong University; Nanchang 330013, Jiangxi, China
3.
School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China

More Information

Author Bio:
LI Zai-wei (1983-), male, associate professor, PhD, +86-21-67791163, lzw_5220964@163.com

Article Text (Baidu Translation)

摘要

摘要: 针对轨道短波不平顺问题, 提出了一种基于离散二进制小波的轨道短波不平顺数值模拟方法, 将ISO 3095标准谱作为目标函数, 得到了ISO 3095标准谱和小波系数的关系, 给出了数值模拟算法流程与步骤, 并将数值模拟结果与上海某段地铁实测结果进行了对比分析。分析结果表明: 合适的小波分解层数为8层, 最低层包含的波长范围为512~1 024 mm; 短波不平顺数值模拟时域波形符合实际轨道短波不平顺的统计特征, 呈现非平稳性, 幅值分布范围为-0.15~0.15 mm; 数值模拟结果与ISO 3095标准谱之间存在的差异由倍频程采样间隔与三分之一倍频程采样间隔的差异造成。可见, 采用二进制小波变换可以有效实现轨道短波不平顺的数值模拟, 模拟结果与实测结果在幅值和细部波形方面略有差别, 建议对轨道短波不平顺进行大量的测量与统计分析。
- 地铁轨道 /
- 小波变换 /
- 三分之一倍频程分析 /
- 短波不平顺 /
- 数值模拟
Abstract: Aiming at the shortwave track irregularity problem, a numerical simulation method based on scattered binary wavelet was proposed.The relationship between ISO 3095 standard spectrum and wavelet coefficients was obtained with ISO 3095 standard spectrum as objective function.The algorithm flow and steps of numerical simulation were designed.Numerical simulation result and field measurement result for a subway section in Shanghai were compared.Analysis result shows that suitable wavelet decomposition level is eight and the lowest level covers the wavelength range of 512-1 024 mm.Time domain waveform of numerical simulation for shortwave track irregularity accords with the statistical characteristics of actual shortwave track irregularity and shows instability, its amplitude value distributes in the range of-0.15-0.15 mm.The difference between numerical simulation result and ISO 3095 standard spectrum results from the difference between octave sampling interval and 1/3 octave sampling interval.Using the binary wavelet transform can effectively realize the numerical simulation for shortwave track irregularity.Simulation result and test result are slightly different in amplitude and detailed wavform.It is suggested to do a large number of measurements and statistical analysis forshortwave track irregularity.
- subway track /
- wavelet transform /
- 1/3 octave analysis /
- shortwave track irregularity /
- numerical simulation

HTML全文

图 1 ISO 3095标准谱

Figure 1. Standard spectrum of ISO 3095

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图 2 算法流程

Figure 2. Algorithm flow

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图 3 RMF型波磨测量仪

Figure 3. RMF rail corrugation device

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图 4 实测时域波形

Figure 4. Time domain waveform of field measurement

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图 5 消除低频趋势项后的时域波形

Figure 5. Time domain waveform after eliminating low frequency trend item

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图 6 小波分解结果

Figure 6. Wavelet decomposition result

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图 7 消除低频趋势项后的小波分解结果

Figure 7. Wavelet decomposition result after eliminating low frequency trend item

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图 8 谱线对比

Figure 8. Spectrum comparison

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图 9 数值模拟时域波形

Figure 9. Time domain waveform of numerical simulation

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图 10 数值模拟不平顺水平谱

Figure 10. Irregularity level spectrums of numerical simulation

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图 11 数值模拟小波分解结果

Figure 11. Wavelet decomposition result of numerical simulation

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表 1 频带对应关系

Table 1. Frequency band correspondence relationship

下载: 导出CSV

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