Estimation of power spectrum density track irregularities of low-speed maglev railway lines

被引：0
|
作者：
Zhang G. [1 ]
Li J. [1 ]
Yang Z.-J. [1 ]
机构：
[1] Engineering Research Center of Maglev, National University of Defense Technology
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2011年 / 33卷 / 10期
关键词：
Curve-fitting; Magnetic levitation; Power spectrum density; Track irregularity;
D O I：
10.3969/j.issn.1001-8360.2011.10.014
中图分类号：
学科分类号：
摘要：
Track irregularity is the main excitation source to vibration of the maglev train, and it has direct influence on stability and ride quality of the train. The statistical specimens of track irregularities are collected from the TangShan low-speed maglev experimental line on the basis of the stationarity tests of the specimens, the Fast Fourier Transform(FFT) method was used to evaluate the spectra of the whole specimen space. Distribution of track irregularities in space wavelengths was found. Analysis results show that the structural parameters, installation precision and rolling technique of tracks are the main causes of track irregularity. Referring to the mature PSD(power spectrum density) expressions published athome and abroatl, the set fitting formulas of PSD for low-speed maglev railway lines were proposed. The parameter values of PSD fitting curves for low-speed maglev track irregularities were obtained by use of the damping curve-fitting algorithm in the least-squares sense. Significaul reference is provided to study on track irregularity PSD of low-speed maglev railway lines.
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页码：73 / 78
页数：5
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