层状饱和地基-轨道-列车耦合系统轨道不平顺引起的振动分析

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摘要采用半解析方法研究了层状饱和地基-轨道-列车耦合系统的动力响应问题。层状饱和地基由任意水平饱和土层和下卧饱和半空间组成，轨道采用以无限长欧拉梁模拟的钢轨、连续质量块模拟的轨枕和Cosserat模型模拟的道砟组成的三层系统，列车模拟为弹簧和阻尼元件连接的多刚体系统。振动输入由钢轨的竖向不平顺提供。通过地基表面轨道中心处竖向位移与道砟位移相等实现层状饱和地基和轨道的耦合，通过在车轮与钢轨间引入Hertizian接触弹簧来实现轨道与列车的耦合，首先求得频率-波数域内解答，然后通过Fourier逆变换求得时间-空间域内振动响应。文中验证了方法的正确性，并进行了数值计算分析，研究表明钢轨不平顺引起的列车动荷载振动频率较低时，随着列车运行速度的增大地基表面位移幅值逐渐增大；振动频率较高时，列车运行速度对位移幅值峰值的影响不明显，但列车驶过后地基的振动明显增大，振动时间变长。

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	巴振宁1
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关键词 ：层状饱和地基, 地基-轨道-列车耦合系统, 格林函数, 轨道不平顺

Abstract：

The dynamic responses of layered saturated ground-track-train coupling system are studied by the semi-analytical method. The layered saturated ground is composed by arbitrary horizontal saturated layers and the underlying saturated half-space. The track is composed by the rail, the sleepers and the blast. The rail is regarded as an infinitely long Euler beam; the sleepers are represented by a continuous mass and the ballast is accounted for by introducing the Cosserat model. The vehicle is described as a multi-rigid-body system connected by the spring and damping elements. The dynamic loads are assumed to be generated from the rail surface irregularities. The dynamic responses are first obtained in the frequency-wave number domain and then are transformed into the time-space domain by inverse Fourier transformation. Finally, the dynamic responses in the time-space domain are obtained by using inverse Fourier transform. The exactness of the method is verified and numerical calculation and analysis are performed. The study shows that, for low vibration frequencies induced by track irregularities, the ground surface displacement amplitudes increase gradually with the increase of the velocity, while for high vibration frequencies, the maximum displacement amplitudes seems insensitive to the velocity, but the amplitudes vibrate more seriously and the durations of the vibration become longer.

Key words： layered saturated ground ground-track- vehicle coupling system green’s function rail irregularity

收稿日期: 2014-04-03 出版日期: 2015-08-15

引用本文:

巴振宁1，2，金威1，梁建文1,2. 层状饱和地基-轨道-列车耦合系统轨道不平顺引起的振动分析[J]. 振动与冲击, 2015, 34(15): 88-97.
Ba zhenning1,2, Jin wei1, Liang Jianwen1,2. Vibration analysis of layered saturated ground-track-vehicle coupling system induced by track irregularities. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(15): 88-97.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I15/88

[1] Sheng X., Jones CJC., Thompson DJ., A comparison of a theoretical model for quasi-statically and dynamically induced environmental vibration from trains with measurements, Journal of Sound and Vibration, 2003, 267(3): 621–635
[2] Sheng X., Jones CJC., Thompson DJ., A theoretical study on the influence of the track on train-induced ground vibration, Journal of Sound and Vibration, 2004, 272(3): 909-936
[3] Sheng X., Jones CJC., Thompson DJ., Prediction of ground vibration from trains using the wavenumber finite and boundary element methods, Journal of Sound and Vibration, 2006, 293: 575–586
[4] Metrikine AV., Verichev SN., Blauwendraad J., Stability of a two-mass oscillator moving on a beam supported by a visco-elastic half-space, International Journal of Solids and Structures, 2005, 42: 1187–1207
[5] Auersch L., The excitation of ground vibration by rail traffic: theory of vehicle–track–soil interaction and measurements on high-speed lines, Journal of Sound and Vibration, 2005, 284(1): 103-132
[6] 和振兴, 翟婉明, 杨吉忠，赵怀耘，铁路交通地面振动的列车-轨道-地基耦合数值方法研究，振动工程学报，2008，21（5）：488–492（He ZX., Zhai WM., Yang JZ., Zhao HY., Train-track-ground coupling numerical method for railway traffic induced ground vibration, Journal of Vibration Engineering, 2008, 21(5): 488-492）
[7] Xia H., Cao YM., Roeck G De., Theoretical modeling and characteristic analysis of moving-train induced ground vibrations, Journal of Sound and Vibration, 2010, 329: 819-832
[8] Cao YM., Xia H., Analysis of Green’s functions in wave number-frequency domain for surface displacements of elastic layered half-space soil, Journal of Computer Mechanics, 2008, 25(6): 283-288
[9] 冯青松，雷晓燕，练松良，轨道随机不平顺影响下高速铁路地基动力分析模型，振动工程学报，2013，26（6）：927-934 （Feng QS., Lei XY., Lian SL., A dynamic model of ground for high-speed railway with track random irregularities, Journal of Sound and Vibration, 2013, 26(6): 927-934）
[11] 蔡元强，王玉，曹志刚，徐长节，列车运行时由轨道不平顺引起的地基振动研究，岩土力学，2012，32（2）：327-335（Cai YQ., Wang Y., Cao ZG., Xu CJ., Study of ground vibration from trains caused by track irregularities, Rock and Soil Mechanics, 2012, 32(2): 327-335）
[11] 巴振宁，梁建文，梅雄一，斜入射平面SH波在层状饱和半空间中沉积谷地周围的三维散射，岩土工程学报，2013，35（3）：476-486 （Ba ZN., Liang JW., Mei XY., Three-dimensional scattering of obliquely incident plane SH waves in alluvial
valley embedded in layered saturated half-space, Chinese Journal of Geotechnical Engineering, 2013, 35(3): 476-486）
[12] Biot M A., The theory of propagation of elastic waves in a fluid-saturated porous solid I: Low-frequency range, J Acoust Soc Am, 1956, 28: 168-178
[13] Biot M A., The theory of propagation of elastic waves in a fluid-saturated porous solid II: Higher-frequency range, J Acoust Soc Am, 1956, 28: 179-191
[14] Picoux B., Le Houe´dec D., Diagnosis and prediction of vibration from railway trains, Soil Dyn Earthq Eng, 2005, 25: 905-921
[15] Jenkins HH., Stephenson JE., Clayton GA., Morland GW., Lyon D., The effect of track and vehicle parameters on wheel/rail vertical dynamic loads. Rail Engineering Journal, 1974, 3 (1): 2–16