摘要
为研究曲线线路参数对钢轨横向模态整体影响规律,建立钢轨-扣件-轨道板曲线钢轨三维有限元模型,分别改变扣件刚度、曲线半径和扣件间距,通过谐响应分析获取轨道固有频率,与标准工况下对应阶固有频率对比,统计模态整体变化规律,获取轨道参数对500~3000 Hz频率内横向振动特性影响规律。结果表明:随着统计阶数的增多,多阶固有频率变化均值趋近于恒定值;多阶固有频率变化均值与扣件刚度和曲线半径正相关,与扣件间距负相关;单阶固有频率随扣件刚度、曲线半径和扣件间距近似线性变化,扣件刚度敏感性系数为0~0.5 Hz(/kN/mm),曲线半径敏感性系数约0.01 Hz/mm,扣件间距敏感性系数约-1 Hz/mm。
The overall influence laws of curve line parameters on the rail transverse mode were studied,the railfastener-track slab curve rail three-dimensional finite element model was established,and the fastener stiffness,curve radius and fastener spacing was changed respectively.The track natural frequency was obtained through harmonic response analysis by comparing with the corresponding natural frequency under standard working conditions,the overall change law of mode was counted,and the influence law of track parameters on the transverse vibration characteristics within the frequency of 500~3000 Hz was obtained.The results show that with the increase of statistical order,the mean changing value of multi-order natural frequency tends to a constant value.The mean changing value of multi-order natural frequency is positively correlated with fastener stiffness and curve radius,and negatively correlated with fastener spacing.The single order natural frequency changes approximately linearly with the fastener stiffness,curve radius and fastener spacing.The fastener stiffness sensitivity coefficient is 0~0.5 Hz/(kN/mm),the curve radius sensitivity coefficient is about 0.01 Hz/mm,and the fastener spacing sensitivity coefficient is about-1 Hz/mm.
作者
岳国栋
董京
王大志
王立鼎
蔡小勇
洪嘉希
YUE Guodong;DONG Jing;WANG Dazhi;WANG Liding;CAI Xiaoyong;HONG Jiaxi(School of Mechanical Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Mechanical Engineering,Dalian University of Technology,Dalian Liaoning 116024,China;Shenyang Railway Signal Co.Ltd.,Shenyang 110025,China)
出处
《铁道建筑》
北大核心
2022年第6期36-40,共5页
Railway Engineering
基金
国家自然科学基金(51705340
52075348)。
关键词
高速铁路
横向振动
有限元分析
钢轨固有频率
扣件刚度
曲线半径
扣件间距
敏感性系数
high speed railway
transverse vibration
finite element analysis
rail natural frequency
fastener stiffness
curve radius
fastener spacing
sensitivity coefficient
作者简介
第一作者:岳国栋(1983-),男,副教授,博士。E-mail:ygd@sjzu.edu.cn。
