张昭, 杨新文, 马骙骙, 赵治钧, 陆文学. 现代有轨电车线路扣件系统模态与钢轨波磨关系研究[J]. 工程力学, 2021, 38(12): 249-256. DOI: 10.6052/j.issn.1000-4750.2020.12.0906
引用本文: 张昭, 杨新文, 马骙骙, 赵治钧, 陆文学. 现代有轨电车线路扣件系统模态与钢轨波磨关系研究[J]. 工程力学, 2021, 38(12): 249-256. DOI: 10.6052/j.issn.1000-4750.2020.12.0906
ZHANG Zhao, YANG Xin-wen, MA Kui-kui, ZHAO Zhi-jun, LU Wen-xue. STUDY ON RELATIONSHIP BETWEEN FASTENER SYSTEM MODE AND RAIL CORRUGATION OF MODERN TRAM LINE[J]. Engineering Mechanics, 2021, 38(12): 249-256. DOI: 10.6052/j.issn.1000-4750.2020.12.0906
Citation: ZHANG Zhao, YANG Xin-wen, MA Kui-kui, ZHAO Zhi-jun, LU Wen-xue. STUDY ON RELATIONSHIP BETWEEN FASTENER SYSTEM MODE AND RAIL CORRUGATION OF MODERN TRAM LINE[J]. Engineering Mechanics, 2021, 38(12): 249-256. DOI: 10.6052/j.issn.1000-4750.2020.12.0906

现代有轨电车线路扣件系统模态与钢轨波磨关系研究

STUDY ON RELATIONSHIP BETWEEN FASTENER SYSTEM MODE AND RAIL CORRUGATION OF MODERN TRAM LINE

  • 摘要: 为了预防有轨电车扣件系统中弹条断裂病害的发生,对现代有轨电车钢轨-扣件系统进行有限元模型建立,并在考虑弹条正常安装状态预应力的基础上,对不同轨下垫板刚度的扣件系统进行模态分析,利用统计方法研究了列车速度、波磨波长、弹条模态及轨下垫板刚度之间的相关关系,结果表明:弹条小圆弧处断裂与其中高阶模态有关,大圆弧处断裂与其中低阶模态有关,现代有轨电车系统的列车通过频率主要分布于500 Hz以下频段;随着轨下垫板刚度增加,弹条模态固有频率提高,受轨下垫板刚度影响较大的弹条模态固有频率的频段为196.64 Hz~258.31 Hz、630.16 Hz~673.51 Hz;在列车车速(30 km/h~70 km/h)和钢轨波磨波长(25 mm~80 mm)等概率分布的条件下,3种典型弹条断裂形式出现的概率分别为3.5%、36.3%、25.9%,改变车速及波长范围即可进行指定线路的弹条断裂形式概率分析,从而有针对地进行养护维修、伤损检测计划的安排。

     

    Abstract: To prevent rail clip fracture damage in tram fastener system, the finite element model of modern tram rail fastener system was built, and pre-stress modal analysis on the fastener system with different rail pad stiffness under installation state was carried out, then the correlation among train speed, corrugation wavelength, rail clip mode and stiffness of rail pad was studied. The results show that: The fracture at the small arc of the rail clip is related to the high-order mode, while the fracture at the large arc is related to the low-order mode. The train passing frequencies of modern tram system are below 500 Hz; With the increase of the rail pad stiffness, the natural frequency of the rail clip mode increases. Its frequency band is 196.64 Hz~258.31 Hz and 630.16 Hz~673.51 Hz; Under the condition of equal probability distribution of train speed (30 km/h~70 km/h) and rail corrugation wave length (25 mm~80 mm), the probability of three typical rail clip fracture types is 3.5%, 36.3% and 25.9%, respectively. By changing the speed and wavelength range, the probability analysis of rail clip fracture mode of the designated line can be carried out, so as to make targeted maintenance and damage detection plan.

     

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