The existing analytical model for vertical vibration of the vehicle- track-subgrade-layered ground coupling system with ballasted track is modified to a new model that adapts to the coupling system with slab ballastless track. According to the passenger dedicated railway line in our country, ground vibrations generated by high speed train running on the railway line with ballasted track and slab ballastless track structure are analyzed and compared. The vibration levels, time histories and Z vibration levels of the vertical ground accelerations, the power spectrums and time histories of dynamic stress on ground surface are gained, and influences of track random irregularities on ground vibration are also discussed. The analysis results show that the vibration isolation capability of the slab ballastless track is the better; the vibration accelerations and dynamic stresses of ground with slab ballastless track are less than the corresponding values for the ballasted track, and in which the Z vibration levels decrease about 10~20dB, moreover, the reduced vibrations mainly distribute in the frequency range of 10~40Hz. The moving axle load has great contribution to ground vibration in low frequency range, nevertheless the track random irregularities mainly effect ground vibration in medium and high frequency ranges. The track random irregularities of the slab ballastless track have greater influences on ground vibration than the corresponding condition with the ballasted track. So the track irregularities of the slab ballastless track should be strictly controlled.
Key words
ballasted track /
slab ballastless track /
track random irregularities /
ground vibration /
passenger dedicated railway line
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 翟婉明.车辆—轨道耦合动力学[M].第三版.北京:科学出版社，2007.
[2] 雷晓燕.轨道力学与工程新方法[M].北京:中国铁道出版社，2002.
[3] 周星德，吴利平，曾鹏等.高速列车引起地基振动分数阶模型[J].振动与冲击,2014,33(10):34-37.
ZHOU Xing-de,WU Li-ping,ZENG Peng,et.al. A fractional derivative model for highspeed train-induced ground vibration[J]. Journal of Vibration and Shock,2014,33(10):34-37.
[4] Sheng X, Jones C J C, Thompson D J. A theoretical model for ground vibration from trains generated by vertical track irregularities[J]. Journal of Sound and Vibration,2004,272: 937-965.
[5] Lombaert G , Degrande G . Ground-borne vibration due to static and dynamic axle loads of InterCity and high-speed trains[J]. Journal of Sound and Vibration,2009,319: 1036-1066.
[6] 蔡袁强，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[J].岩土力学,2012,33(2):327-335.
CAI Yuan-qiang, WANG Yu, CAO Zhi-gang, XU Chang-jie. Study of ground vibration from trains caused by track irregularities[J]. Rock and Soil Mechanics, 2012,33(2):327-335.
[7] Ju S H, Liao J R, Ye Y L. Behavior of ground vibrations induced by trains moving on embankments with rail roughness[J]. Soil Dynamics and Earthquake Engineering,2010, 30: 1237-1249.
[8] 和振兴, 翟婉明, 杨吉忠等.铁路交通地面振动的列车-轨道-地基耦合数值方法研究[J].振动工程学报，2008，21(5):488-492.
HE Zhen-xing,ZHAI Wan-ming,YANG Ji-zhong, et.al. Train-track-ground coupling numerical method for railway traffic induced ground vibration[J]. Journal of Vibration Engineering,2008,21(5): 488-492.
[9] 陈功奇，高广运，赵 宏.不平顺条件下高速列车运行引起的地基振动[J]. 岩石力学与工程学报,2013,32(S2):4123-4129.
CHEN Gong-qi，GAO Guang-yun，ZHAO Hong. Ground vibration induced by high-speed railway operation with geometric irregularities[J], Chinese Journal of Rock Mechanics and Engineering, 2013,32(S2):4123-4129.
[10] 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[J].振动工程报,2013,26(6):927-934.
FENG Qing-song, LEI Xiao-yan, LIAN Song-liang. A dynamic model of ground for high-speed railway with track random irregularities [J]. Journal of Vibration Engineering, 2013,26(6):927-934.
[11] 冯青松，雷晓燕，练松良.高速铁路路基-地基系统振动响应分析[J].铁道科学与工程学报，2010，7（1）：1-6.
FENG Qing-song, LEI Xiao-yan, LIAN Song-liang. Vibration analysis of high-speed railway subgrade-ground system [J].Journal of Railway Science and Engineering, 2010,7(1):1-6.
[12] 中华人民共和国铁道部．铁建设函［2005］754 号 客运专线无砟轨道铁路设计指南[S]．北京:中国铁道出版社，2005．
[13] 中华人民共和国铁道部. 铁建设[2005]140号新建时速200～250公里客运专线铁路设计暂行规定[S].北京：中国铁道出版社，2005.
[14] 中华人民共和国铁道部. TB10020-2009 高速铁路设计规范[S]. 北京:中国铁道出版社，2009.
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(2635 KB)
