特殊减振地段装配式浮置板轨道动力特性分析

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1338 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

Abstract Research purposes: In order to meet the vibration reduction requirements of special sections of urban rail transit with a speed of 120 km/h, and to facilitate construction, maintenance and repair, a new fabricated floating slab track structure was proposed. Based on the finite element method and vehicle-track system coupling dynamics, the modal analysis, dynamic index evaluation and vibration reduction effect evaluation of the structure were carried out, and the effects of different slab lengths were compared and analyzed.
Research conclusions: (1) When the length of floating slab is 3.55 m, 4.75 m and 5.95 m, the fundamental frequency of structure is 12~14 Hz. The increase of slab length will reduce the natural frequency, while has little influence on modal shape of each order. (2) The running safety, stability and track structure stability of 4.75 m and 5.95 m floating slab all meet the requirements. In order to meet the requirements of all dynamic response indexes, the steel spring supporting stiffness of the 3.55 m floating slab should be greater than 8.5 MN/m. (3) The root mean square differences of frequency division vibration level corresponding to the slab length of 3.55 m, 4.75 m and 5.95 m are 14.32 dB, 15.49 dB and 16.48 dB. The longer the floating slab is, the worse the vibration reduction effect at low frequency 1~5 Hz, but the better the vibration reduction effect at high frequency 20~125 Hz, which is more in line with the vibration reduction requirements of urban rail transit. In the specific structural design, the type of slab shall be reasonably selected according to the construction conditions and actual vibration reduction requirements in combination with the results of environmental impact assessment. (4) For the special vibration reduction section of urban rail transit, the research result can provide theoretical guidance for the selection and application of prefabricated floating slab track.

Key words： subway special vibration section steel spring floating slab assembling dynamic characteristics finite element method

Received: 17 May 2021

PACS:

U213.1+4

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I7/44

[1]	Hussein M F M, Hunt H E M. Modelling of Floating-slab Track with Discontinuous Slab - Part 2: Response to Moving Trains[J]. Journal of Low Frequency Noise Vibration and Active Control,2006(2):111-118.
[2]	侯德军,雷晓燕,刘庆杰. 浮置板轨道系统动力响应分析[J]. 铁道工程学报,2006(8):18-24.Hou Dejun, Lei Xiaoyan, Liu Qingjie. Analysis of Dynamical Responses of Floating Slab Track System[J]. Journal of Railway Engineering Society,2006(8):18-24.
[3]	刘维宁,丁德云,李克飞,等. 钢弹簧浮置板轨道低频特征试验研究[J]. 土木工程学报,2011(8):118-125.Liu Weining, Ding Deyun, Li Kefei, etc. Experimental Study of the Low-frequency Vibration Characteristics of Steel Spring Floating Slab Track[J]. China Civil Engineering Journal,2011(8):118-125.
[4]	耿传智,余庆. 地铁轨道结构减振性能的仿真分析[J]. 同济大学学报:自然科学版,2011(1):85-89.Geng Chuanzhi, Yu Qing. Shock Absorption Analysis of Subway Rail Track Structure[J]. Journal of Tongji University:Natural Science,2011(1):85-89.
[5]	刘笑凯,任娟娟,潘国瑞,等. 贵阳轨道交通1号线钢弹簧浮置板轨道过渡段合理设置方式研究[J]. 铁道标准设计, 2015(3):50-53.Liu Xiaokai, Ren Juanjuan, Pan Guorui, etc. Setting of Transition Section of Spring-steel Floating Slab Track on Guiyang Rail Transit Line 1[J]. Railway Standard Design, 2015(3):50-53.
[6]	韦凯,豆银玲,杨麒陆,等. 钢弹簧浮置板轨道的随机振动分析及参数优化[J]. 华中科技大学学报:自然科学版, 2017(8): 115-119.Wei Kai, Dou Yinling, Yang Qilu, etc. Random Vibration Analysis and Parameter Optimization of Steel-spring Floating-slab Track[J]. Journal of Huazhong University of Science and Technology:Natural Science Edition,2017(8):115-119.
[7]	任娟娟,赵华卫,李潇,等. 减振CRTS Ⅲ型板式无砟轨道结构谐响应分析[J]. 铁道工程学报,2016(3):44-50.Ren Juanjuan, Zhao Huawei, Li Xiao, etc. Analysis of Harmonic Response of CRTS Ⅲ Prefabricated Slab Track with Anti-vibration Structure[J]. Journal of Railway Engineering Society,2016(3):44-50.
[8]	涂勤明,雷晓燕,毛顺茂. 地铁产生的环境振动及轨道结构减振分析[J]. 噪声与振动控制,2014(4):178-183.Tu Qinming, Lei Xiaoyan, Mao Shunmao. Analyses of Subway Induced Environment Vibration and Vibration Reduction of Rail Track Structure[J]. Noise and Vibration Control,2014(4):178-183.