嵌入式轨道结构几何参数优化研究

发布时间：2018-04-03 15:38

本文选题：嵌入式轨道结构　切入点：轨道参数　出处：《西南交通大学》2015年硕士论文

【摘要】：嵌入式轨道结构是有轨电车行车的基础,其功能是在设计使用年限内满足有轨电车按设计速度安全、舒适的运行。嵌入式轨道结构主要由钢轨、聚氨酯材料、弹性垫板、PVC管、嵌入式轨道板、自密实混凝土、底座等组成。嵌入式轨道结构首次在国内铺设,在国内尚无工程案例可借鉴,本文参考铁路客运专线铺设的单元式无砟轨道,提出了嵌入式轨道结构设计存在的问题。基于嵌入式轨道结构形式及所分析的问题,建立了对应的力学分析模型,采用有限元法对嵌入式轨道结构进行了研究。主要研究内容包括：1、收集国内外现代有轨电车轨道结构主要形式。分析国内外各轨道结构的特点,对比分析嵌入式轨道结构与铁路单元式无砟轨道结构的异同点,提出嵌入式轨道设计存在不合理的地方。2、针对本文所研究的问题建立力学模型,对力学模型中各部件进行简化。分析力学模型中荷载的取值。根据有轨电车定距、轴距,分析有轨电车单轮、群轮荷载在嵌入式轨道板上的传递范围,得出计算模型中仅需考虑一个轮对载荷的作用。3、根据嵌入式轨道结构在设计使用年限中可能存在的层间关系和承受的荷载,研究嵌入式轨道板及自密混凝土厚度参数对嵌入式轨道结构备部件受力的影响,为嵌入式轨道板及自密实混凝土厚度的合理取值范围提供理论依据。4、建立梁-体模型,通过不同的荷载组合计算嵌入式轨道板纵横向截面最大内力值,以计算所得的截面内力值为依据对嵌入式轨道板配筋计算。
[Abstract]:Embedded track structure is the basis of tram driving, and its function is to meet the safety and comfort of tram running at designed speed within the design service life.The embedded track structure mainly consists of rail, polyurethane material, elastic cushion board and PVC pipe, embedded track board, self-compacting concrete, base and so on.The embedded track structure is laid in China for the first time, but there are no engineering cases to be used for reference in our country. This paper refers to the unit ballastless track laid on the railway passenger dedicated line, and puts forward the problems existing in the design of the embedded track structure.Based on the form of embedded track structure and the problems analyzed, the corresponding mechanical analysis model is established, and the embedded track structure is studied by finite element method.The main research contents include: 1, collecting the main forms of modern tram track structure at home and abroad.This paper analyzes the characteristics of each track structure at home and abroad, compares and analyzes the similarities and differences between embedded track structure and railway element ballastless track structure, puts forward the unreasonable place of embedded track design, and establishes a mechanical model for the problems studied in this paper.The components in the mechanical model are simplified.The value of load in mechanical model is analyzed.According to the distance and wheelbase of tram, the transmission range of single wheel and group wheel load on embedded track board is analyzed.It is concluded that only one wheelset load should be considered in the calculation model. According to the interlayer relationship and the load bearing in the design life of embedded track structure,The influence of the thickness parameters of embedded track slab and self-compacting concrete on the force of embedded track structure spare parts is studied, which provides a theoretical basis for the reasonable value range of embedded track slab and self-compacting concrete thickness, and establishes the beam-body model.The maximum internal force of longitudinal and transverse section of embedded track plate is calculated by different load combinations, and the reinforcement value of embedded track plate is calculated based on the calculated internal force value of the section.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U492.433

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