Number selection and structural optimization of 400 km · h-1high-speed turnout

被引：0
|
作者：
Wang P. [1 ]
Wang S.-G. [1 ]
Wang M. [1 ]
Zhao Z.-H. [2 ]
Si D.-L. [1 ]
Ma S.-Y. [3 ]
Sun Z.-L. [4 ]
机构：
[1] Railway Engineering Research Institute, China Academy of Railway Sciences Co., Ltd., Beijing
[2] CARS (Beijing) Railway Equipment Technology Co., Ltd., Beijing
[3] Postgraduate Department, China Academy of Railway Sciences, Beijing
[4] Zhuzhou Times New Material Technology Co., Ltd., Hunan, Zhuzhou
来源：
Jiaotong Yunshu Gongcheng Xuebao/Journal of Traffic and Transportation Engineering | 2023年 / 23卷 / 03期
基金：
中国国家自然科学基金;
关键词：
high-speed railway; high-speed turnout; insufficient displacement control; linetype optimization; number selection; smoothness improvement; stiffness optimization;
D O I：
10.19818/j.cnki.1671-1637.2023.03.008
中图分类号：
学科分类号：
摘要：
According to the demand for further improving the operating speed of high-speed railways in China, the number selection and structural optimization methods of a 400 km · h-1high-speed turnout were studied systematically. Based on the vehicle-turnout coupling dynamics simulation, the correlation between turnout number and ride comfort was analyzed, and the suggestions for number selection were given. The influence of turnout linetype on the dynamics performance was studied, the principle of utilizing existing turnout sleepers was considered, and a linetype optimization scheme was proposed. A prototype test platform for the switch rail conversion of the No. 18 KEZHUANXIAN turnout was established. The influencing factors and mechanisms of insufficient switch rail displacement were studied, and a control method of the insufficient displacement was proposed. A calculation model of track stiffness in the turnout area was established based on the finite clement theory. According to on-site measured data of rail dynamic displacement in the turnout area, a target value and a homogenization scheme for track stiffness were proposed. Research results indicate that under the condition of the existing station layout plan, it is recommended to choose the No. 18 turnout as the 400 km · h-1high-speed turnout. The mutual distance of the 400 km · h-1high-speed turnout can be increased to 28 mm, which can significantly improve the wear resistance and service life of the switch rail and can utilize the existing turnout sleepers. By comprehensively considering the system matching design, manufacturing process, combination requirements of track maintenance and electrical divisions, and other factors, it is recommended to reduce the distance from the third traction point to the fixed end by 600 mm, which can reduce the insufficient switch rail displacement. At the same time, the minimum flangeway and the traction force of the third traction point meet the code requirements. In addition, the structural design method of high-speed turnout crossings should be improved, in which the clastic deformation state of the point rail should be determined according to the actual forces, and the connectors and point rail conversion should be designed on this basis. It is also recommended that the target stiffness of the turnout area should be reduced from 25 ± 5 kN · mm-1to 23 ± 3 kN · mm-1. 3 tabs, 8 figs, 32 refs. © 2023 Chang'an University. All rights reserved.
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页码：114 / 126
页数：12
相关论文
共 33 条
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