摘要
【目的】轨道结构的振动一直是相关领域亟待研究和解决的问题。传统减隔振装置受到自身重量与列车行车安全性的限制,难以实现对轨道结构弯曲波的宽频调控。【方法】通过引入振幅放大机制,设计了一种杠杆式轨道综合减隔振装置。以CRTSⅢ型板式无砟轨道结构为研究对象,采用能量泛函变分法和人工弹簧技术建立了配置有轨道综合减隔振装置的周期性轨道结构波动分析模型和振动响应分析模型,研究了轨道综合减隔振装置对弯曲波的调控能力,并分析了轨道综合减隔振装置工作能力与振幅放大系数的关系。【结果】结果表明:采用振幅放大机制,能够有效增大减隔振装置的惯性质量,增强减隔振装置的阻尼特性和刚度特性,进而显著提升其工作能力。【结论】实现了轨道综合减隔振装置“低频隔振高频吸振”的超宽频弯曲波调控设计目标。
【Objective】The vibration of track structure has always been a problem to be studied and solved in related fields.The traditional vibration isolation device is limited by its own weight and the safety of train operation,so it is difficult to realize the broadband control of the bending wave of the track structure.【Method】By introducing the amplitude amplification mechanism,a lever-type track integrated vibration isolation device is designed.Taking the CRTSⅢslab ballastless track structure as the research object,the energy functional variational method and artificial spring technology are used to establish the periodic track structure fluctuation analysis model and vibration response analysis model with and artificial spring technology.The control ability of track comprehensive vibration isolation device to bending wave is studied,and the relationship between the working ability of track comprehensive vibration isolation device and amplitude amplification coefficient is analyzed.【Result】The results show that the amplitude amplification mechanism can effectively increase the inertial mass of the vibration isolation device,enhance the damping characteristics and stiffness characteristics of the vibration isolation device,and then significantly improve its working ability.【Conclusion】The ultra-wideband bending wave control design goal of the track integrated vibration isolation device low frequency vibration isolation and high frequency vibration absorption is realized.
作者
罗文俊
张梁
郭文杰
洪显
李佳宝
Luo Wenjun;Zhang Liang;Guo Wenjie;Hong Xian;Li Jiabao(State Key Laboratory Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China)
出处
《华东交通大学学报》
2024年第2期25-32,共8页
Journal of East China Jiaotong University
基金
国家杰出青年科学基金项目(52225210)
江西省自然科学基金项目(20224BAB204069)
江西省博士后择优资助项目(2021KY25)
江西省教育厅科技项目(GJJ2200629)
江西省研究生创新资金项目(YC2022-s555)。
关键词
振幅放大
波动分析
带隙
周期性结构
弯曲波调控
amplitude amplification
fluctuation analysis
band gap
periodic structure
bending wave control
