高速铁路扣件系统高频动态特性研究

doi:10.3901/JME.2023.16.147

机械工程学报 ›› 2023, Vol. 59 ›› Issue (16): 147-156.doi: 10.3901/JME.2023.16.147

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高速铁路扣件系统高频动态特性研究

陈宗平¹, 成功¹, 圣小珍²

1. 西南交通大学牵引动力国家重点实验室成都 610031;
2. 上海工程技术大学城市轨道交通学院上海 201620

收稿日期:2022-09-11 修回日期:2023-01-20 出版日期:2023-08-20 发布日期:2023-11-15
通讯作者: 圣小珍(通信作者),男,1962年出生,博士,教授,博士研究生导师。主要研究方向为铁路振动噪声理论。E-mail:shengxiaozhen@hotmail.com
作者简介:陈宗平,男,1995年出生。主要研究方向为机电产品NVH。E-mail:czp0908@126.com
基金资助:
国家自然科学基金(U1834201);国家重点研发计划战略性国际科技创新合作重点专项(2016YFE0205200)资助项目。

Study on High-frequency Vibration Characteristics of High-speed Railway Fastener System

CHEN Zongping¹, CHENG Gong¹, SHENG Xiaozhen²

1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031;
2. School of Urban Railway Transportation, Shanghai University of Engineering Science, Shanghai 201620

Received:2022-09-11 Revised:2023-01-20 Online:2023-08-20 Published:2023-11-15

摘要/Abstract

摘要： 为了探究高速无砟轨道扣件系统在低温和高频条件下的动刚度特性,以我国现有的WJ-7B及WJ-8B两款扣件为研究对象,首先提出一种确定扣件系统整体动刚度的测试方法和理论模型,其次建立两款扣件的有限元模型并利用试验结果对有限元模型进行验证,最后利用所建立的有限元模型对扣件整体的动刚度特性及弹条对整体动刚度的影响进行了仿真分析。结果表明,WJ-7B扣件的动刚度受频率影响较大,950 Hz处的动刚度比100 Hz时增加了15~19倍;WJ-8B扣件的动刚度则更受温度的影响,-50℃时的动刚度比10℃时最大增加了23倍;WJ-8B扣件的动刚度在铁垫板与弹性垫板所组成的质量-弹簧系统的共振频率处比弹性垫板的动刚度大为降低,而WJ-7B扣件的整体动刚度则更接近于弹性垫板的动刚度;弹条安装弹程对扣件整体高频动刚度的影响则较小。

关键词: 高速铁路扣件, 动刚度, 温变特性, 模态分析

Abstract: In order to explore the dynamic stiffness characteristics of the high-speed railway fastening system under low temperature and high frequency conditions,Taking the existing WJ-7B and WJ-8B fasteners as the research object, firstly, a test method and theoretical model to determine the overall dynamic stiffness of the fastening system are proposed. Secondly, the simulation models of the two fasteners are established, and the model was verified with the test results. Finally, the overall dynamic stiffness characteristics of the fastener and the influence of the clip on the overall dynamic stiffness are simulated and analyzed according to the establishend modal.The results show that the dynamic stiffness of WJ-7B is greatly affected by frequency. The dynamic stiffness at 950 Hz is 15-19 times higher than that at 100 Hz; The dynamic stiffness of WJ-8B fasteners is more affected by temperature, Under-50 ℃The dynamic stiffness of the WJ-8B is 23 times greater than that at 10 ℃; The dynamic stiffness of the WJ-8B fastener is much lower than the dynamic stiffness of the railpad at the first resonance frequency, This order of resonance frequency is caused by the mass-spring system composed of the baseplate and the railpad. The overall dynamic stiffness of WJ-7B fasteners is close to the dynamic stiffness of the railpad; and the deformation of the clip has little effect on the overall high-frequency dynamic stiffness of the fastener.

Key words: high-speed railway fasteners, dynamic stiffness, temperature characteristics, modal analysis

中图分类号:

U211

陈宗平, 成功, 圣小珍. 高速铁路扣件系统高频动态特性研究[J]. 机械工程学报, 2023, 59(16): 147-156.

CHEN Zongping, CHENG Gong, SHENG Xiaozhen. Study on High-frequency Vibration Characteristics of High-speed Railway Fastener System[J]. Journal of Mechanical Engineering, 2023, 59(16): 147-156.

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高速铁路扣件系统高频动态特性研究

Study on High-frequency Vibration Characteristics of High-speed Railway Fastener System

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