摘要
为保证齿轨铁路齿轮和齿条的正确啮合,确保行车安全、平稳,延长部件使用寿命,需对联结部件的受力情况进行分析。采用有限元软件Abaqus,建立250‰坡度路基上齿轨轨道模型及单根轨枕下齿轨-轨枕-道床板模型,分析联结部件受力、紧固件纵向阻力并推导出齿轨接头阻力。结果表明:在250‰坡度时,齿轨中紧固件和接头夹板的应力主要分布在76~177 MPa和50~115 MPa,最大应力分别为303.7,197.9 MPa,可采用屈服强度400 MPa及以上钢材;紧固件和接头夹板处螺栓应力主要分布在144.8~253.2 MPa、50~115 MPa,最大应力分别为433.8,274.7 MPa, 8.8级螺栓可满足要求;紧固件纵向阻力曲线可分为3个阶段:线性阶段、屈服阶段、平台阶段,紧固件纵向阻力为310 kN;对于接头夹板,1个螺栓产生的接头阻力是其所提供拉力的一半,当采用8.8级M22螺栓时,接头阻力为63 kN。
In order to ensure the correct engagement of gear and rack, keep the driving safe and stable, prolong the service life of structure, it is necessary to analyze the stress of the connection parts. In this paper, ABAQUS is used to establish rack railway model on the 250‰ slope subgrade and rack-sleeper-track slab model. The stress of connection part, the longitudinal resistance of fastener and the resistance of joint bar are analyzed. The results show that the stresses of fasteners and joint bars are mainly distributed in the range of 76~177 MPa and 50~115 MPa, and the maximum stress is 303.7 MPa and 197.9 MPa respectively. Therefore, steels with yield strength of 400 MPa or above can be used. The bolt stresses of fasteners and joint bars are mainly distributed in 144.8~253.2 MPa and 50~115 MPa, and the maximum stress is 433.8 MPa and 274.7 MPa respectively, so 8.8-grade bolts can meet the requirements. The longitudinal resistance curve of fastener can be divided into three stages of linear stage, yield stage and platform stage, and the longitudinal resistance is about 310 kN. For the joint bar, the resistance generated by a bolt is half of the tension provided by it. When the M22 of 8.8 grade bolt is used, the resistance of joint bar is 63 kN.
作者
杜文博
苏成光
韩笑东
井国庆
DU Wenbo;SU Chengguang;HAN Xiaodong;JING Guoqing(China Railway Design Corporation,Tianjin 300308,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)
出处
《铁道标准设计》
北大核心
2022年第7期60-64,共5页
Railway Standard Design
基金
中铁第一勘察设计院集团有限公司科技开发计划项目(院科19-90)
陕西省自然科学基础研究计划资助项目(2020JQ-303)。
关键词
齿轨铁路
联结部件
大坡度
力学特性
线路阻力
齿条啮合
rack railway
connection part
steep slope
mechanics characteristic
line resistance
rack engagement
