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Effect of cerium on the cleanliness of spring steel used in fastener of high-speed railway刘延强1,2,王丽君1,2,周国治1,21. State Key Laboratory of Advanced Metallurgy, University of Science and Technology... addition on the quantity, size, distribution of inclusions and the content of oxygen, sulfur and other hazardous residual elements in spring steel used as fastener in high speed railway were......
Effect of cerium on the cleanliness of spring steel used in fastener of high-speed railway刘延强1,2,王丽君1,2,周国治1,21. State Key Laboratory of Advanced Metallurgy, University of Science and Technology... addition on the quantity, size, distribution of inclusions and the content of oxygen, sulfur and other hazardous residual elements in spring steel used as fastener in high speed railway were......
Applicability of small resistance fastener on long-span continuous bridges of high-speed railwayDAI Gong-lian(戴公连), LIU Wen-shuo(刘文硕)(School of Civil Engineering, Central South University, Changsha 410075, China)Abstract:Ballastless tracks have been widely applied in high-speed railway (HSR). The adaptability research between continuous welded rails (CWR) and long-span bridges of HSR is of great......
(1) 式中:M,C和K分别为列车的质量矩阵,阻尼矩阵及刚度矩阵；v为列车的位移向量,包括车体竖向位移vc,点头位移ψc,转向架的竖向位移vb和点头位移ψb这4个轮对的竖向位移zwi(i=1,,4).上标""和""分别表示位移关于时间的一阶导数和两阶导数；F为列车各部分所受的外力矩阵. 图1 整体道床车轨系统扣件失效模型 Fig. 1 Model of fastener failure...失效扣件位置)附近,相较于完好轨道系统,地铁车轨系统各项动力响应都显著增大,且首个峰值出现的位置与失效扣件位置有良好的对应关系.从扣件失效的影响区域来看,钢轨位移,钢轨加速度和轮轨接触力受扣件失效的影响范围较小,只在失效扣件附近有振动变化,但对车体竖向加速度的影响范围较大. 图2 扣件失效对车轨振动的影响 Fig. 2 Influence of fastener failure on train......
%时,稀土变质Al2O3夹杂的理论加入量为0.001 9%.关键词:热力学；稀土；夹杂物；弹簧钢；高铁扣件Thermodynamic analysis of cerium inclusion formed in spring steel used in fastener of high-speed railwayLIU Yan-qiang1, 2, WANG Li-jun1, 2, GUO... Engineering, University of Science a)Abstract:Thermodynamic condition of rare earth cerium inclusion formed in spring steel used in fastener of high-speed railway was studied by the thermodynamic......
Trans. Nonferrous Met. Soc. China 24(2014) 969-974 Effect of laser shock processing on fatigue life of fastener hole Xing-quan ZHANG, Liu-san CHEN, Xiao-liu YU, Li-sheng ZUO, Yu ZHOU School... side surfaces of fastener hole with diameter of 3 mm in the LY12CZ aluminum alloy specimens were investigated. The superficial residual stress was measured by X-ray diffraction method. Fatigue......
; airframe alloy; aerospace fastener 钛元素分布比较广泛,其含量超过地壳质量的0.4%,全球探明储量约34亿吨,在所有元素中含量居第10位(氧,硅,铝,铁,钙,钠,钾,镁,氢,钛)[1-3].美国科学家在1910年采用"钠法"(钠还原TiCl4)最早获得金属钛,但是钛工业并没有随着钛的发现立即得以发展.直到第二次世界大战后的1948年,卢森堡科学家发明的"镁法"(镁还... of fastener titanium alloys[70-74] Ti-6Al-4V(TC4)合金β稳定系数最低,为0.27.它的优点是密度最低,强度和疲劳性能良好,合金成分简单,半成品成本最低.但由于室温塑性没有达到足够高,所以加工紧固件时需要采用感应加热进行热镦成形,以及真空固溶处理和时效处理加工成本较高[73].TB2,TB3,TB8和TB16为亚稳型β钛合金,β稳定系数均比合金高......
路 中图分类号:U213.2 文献标志码:A 文章编号:1672-7207(2020)07-1966-11 Longitudinal force of CWR on high speed railway bridge based on fastener resistance test ZHU... of Heavy Haul Railway, Central South University,Changsha 410075, China) Abstract: The longitudinal resistance model of small resistance fastener with vertical load change was obtained through......
fastener broken shells in Nanjing metro[J]. Urban Mass Transit, 2009, 12(7): 40-42. [2] 王鸿飞. 深圳地铁DTⅥ2型扣件弹条折断原因分析[J]. 技术与市场, 2013, 20(6): 119-120. WANG Hongfei. Analysis of DTⅥ2 type fastener broken shells... Weiqiang. Strength analysis of fastener’s elastic strip in urban mass transit[J]. Transportation Science & Technology, 2012(2): 78-80. [9] 武青海, 陈厚嫦, 周虹伟, 等. 应用非线性接触理论分析弹条 Ⅲ型扣件中弹条的应力和变形[J]. 中国铁道科学, 2003......
; 文章编号:1672-7207(2016)09-3258-06 Performance and improvement of shear-type damper fastener WU Zongzhen1, 2, LIU Weining1, ZHANG Hougui1 (1. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Urban Rail Transit Center, China Academy of Railway Sciences, Beijing 100081, China) Abstract: As a well-working fastener type, shear-type damper......
