铁路钢轨扣件e形弹条动态性能研究及结构改进  

Study on Dynamic Performance and Structure Improvement of e-Type Rail Fastening Clips

作　　者：郁宗飞 顾晓菡 王灵水 黄浩志 刘浪 王安斌[1] YU Zongfei;GU Xiaohan;WANG Lingshui;HUANG Haozhi;LIU Lang;WANG Anbin(School of Urban Rail Transit,Shanghai University of Engineering Science,Shanghai 201620,China;Luoyang Shuangrui Special Equipment Co.,Ltd.,Luoyang 471000,Henan,China;Wuxi Metro Group Co.,Ltd.,Wuxi 214023,Jiangsu,China)

机构地区：[1]上海工程技术大学城市轨道交通学院,上海201620 [2]洛阳双瑞特种装备有限公司,河南洛阳471000 [3]无锡地铁集团有限公司,江苏无锡214023

出　　处：《噪声与振动控制》2023年第4期187-193,共7页Noise and Vibration Control

基　　金：中国国家铁路集团科技研究开发计划资助项目(L2021G005)。

摘　　要：以铁路钢轨扣件e形弹条为研究对象,运用有限元仿真和锤击试验方法对组装状态下弹条动态性能进行研究,随后对弹条进行结构及材料优化形成空心阻尼弹条。通过对原弹条进行强度应力和动态特性分析,弹条组装工作状态下模态试验与模态仿真前3阶固有频率误差分别为2.2%、1.8%、4.9%,仿真模型的有效性得到验证;改进后的空心阻尼弹条对影响弹条共振疲劳损伤的第三阶固有频率从原来DI弹条的747 Hz提高到940 Hz,固有频率提高25.8%,且避开地铁钢轨波磨段750 Hz左右的激励频率;同时对应的阻尼弹条其阻尼损耗因子相对原弹条提高92%,大大地降低弹条共振峰值响应,能够有效地提高弹条疲劳寿命。The e-shaped spring clip of rail fasteners is taken as the research object,its dynamic performance in the assembled state is studied by means of finite element simulation and hammering test method.Then,the structure and material of the spring clip are optimized to form a hollow damping spring clip.Through the static analysis and modal simulation of the original elastic strip,it is found that the differences of the first 3-order natural frequencies between the modal test and the modal simulation under the assembled working state of the elastic strip are 2.2%,1.8%,and 4.9%,respectively,which verifies the effectiveness of the simulation model.The third-order natural frequency of the improved hollow damping elastic strip,which affects the resonance fatigue damage of the elastic strip,is increased from 747 Hz of the original DI elastic strip to 940 Hz,and the natural frequency is increased by 25.8%,avoiding from the excitation frequency of 750 Hz or so of the corrugated section of the subway rail.At the same time,the damping loss factor of the corresponding damping spring is 92%higher than that of the original spring,which greatly reduces the resonance peak response of the spring,and can effectively improve the fatigue life of the spring.

关 键 词：振动与波 钢轨扣件e形弹条 有限元分析 模态试验 动态特性 

分 类 号：U211.5[交通运输工程—道路与铁道工程]