不同轨道不平顺谱激励下高铁列车走行性分析

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摘要 研究目的: 以某主跨48 m+80 m+48 m三跨连续梁桥、两侧各2跨简支引桥及200 m长路基的高铁线路为研究对象,采用CRH3、CRH2C和CRH380A高速动车组,以德国低干扰谱和中国无砟轨道谱为初始轨道不平顺,以映射关系求得的连续梁边墩沉降致轨道变形为附加轨道不平顺,分别评估不同车型高铁列车在不同轨道不平顺谱激励下的走行性。
研究结论: (1)建立的车-轨-连续梁桥动力学模型与文献模型计算结果吻合良好;(2)中国无砟轨道谱在舒适性、平稳性及安全性上均明显优于德国低干扰谱;(3)初始轨道不平顺激励下,对安全性影响强弱依次为CRH380A > CRH3 > CRH2C,对舒适性影响强弱依次为CRH3 > CRH380A > CRH2C,对平稳性影响强弱依次为CRH3 > CRH380A > CRH2C;(4)附加轨道不平顺激励下,对安全性和舒适性影响强弱同初始轨道不平顺,而平稳性随边墩沉降值变化较大,德国低干扰谱激励下,对平稳性影响强弱依次为CRH3 > CRH380A > CRH2C,中国无砟轨道谱激励下,对平稳性影响强弱依次为CRH2C> CRH3 > CRH380A;(5)本研究结果可为高铁线路中主跨为连续梁桥的设计与验算提供一定参考。

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	何彬彬
	冯磊
	冯玉林
	周旺保
	刘祥

关键词 ：高速铁路, 连续梁桥, 映射关系, 动力学指标, 轨道不平顺谱

Abstract：Research purposes: Taking the high-speed railway line of a three-span continuous beam bridge with a main span of 48 m+80 m+48 m, two simply supported approach bridges on each side and 200 m long roadbed as the research object, using CRH3, CRH2C and CRH380A, with German low interference spectrum (German spectrum) and Chinese ballastless track spectrum (Chinese spectrum) is regarded as the initial track irregularity, the track irregularity caused by the settlement of the side pier of the continuous beam obtained by the mapping relationship is regarded as the additional track irregularity, and the running performance of different types of high-speed railway trains under excitation of different track irregularity spectrum is evaluated respectively.
Research conclusions: (1) The calculation results of the dynamic model of vehicle-rail-continuous beam bridge are in good agreement with those of the literature model. (2) The Chinese ballastless track spectrum is obviously better than the German low interference spectrum in comfort, stability and safety. (3) Under the initial track irregularity, the influence on security is in the order of CRH380A > CRH3 > CRH2C, the influence on comfort is CRH3 > CRH380A> CRH2C, and the influence on stability is CRH3 > CRH380A > CRH2C. (4) Under the additional track irregularity, the influence on security and comfort is the same as the initial track irregularity, and the stability varies greatly with the settlement value of the side pier. When using the German low interference spectrum, the influence on stability is in the order of CRH3 > CRH380A > CRH2C, and when using the Chinese ballastless track spectrum, the influence on stability is in the order of CRH2C > CRH3 > CRH380A. (5) The research results can provide some reference for the design and checking of continuous girder bridges with main span in high-speed railway lines.

Key words： high speed railway continuous girder bridge mapping relationship dynamic index track irregularity spectrum

收稿日期: 2021-09-01

PACS:	U24
	TB123

基金资助:国家自然科学基金(52078487);江西省教育厅科学技术研究项目(GJJ200657);江西省交通运输厅科技项目(2019Q0024);中国地震局工程力学研究所基本科研业务费专项资助项目(2020D18)

作者简介: ^**何彬彬,1990年出生,女,讲师。

引用本文:

何彬彬, 冯磊, 冯玉林, 周旺保, 刘祥. 不同轨道不平顺谱激励下高铁列车走行性分析[J]. 铁道工程学报, 2022, 39(7): 36-43.
HE Binbin, FENG Lei, FENG Yulin, ZHOU Wangbao, LIU Xiang. Running Performance Analysis of High-speed Railway Trains under Different Track Irregularity Spectrum Excitation. Journal of Railway Engineering Society, 2022, 39(7): 36-43.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2022/V39/I7/36

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