铁道罐车流固耦合纵向冲击振动特性实验研究  

Tests for a railway tank car's longitudinal vibration and impact characteristics considering fluid-structure interaction

作　　者：张济民[1] 张琴[1] 周和超[1] 王开文[2] 

机构地区：[1]同济大学铁道与城市轨道交通研究院,上海201804 [2]西南交通大学牵引动力研究中心,成都610031

出　　处：《振动与冲击》2015年第15期205-209,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(61174214);科技部重大仪器专项项目(2012YQ15021307)

摘　　要：考虑流固耦合作用下建立由铁道罐车组成的列车的纵向振动及冲击模型的方法仍然是该领域研究长期面临的挑战。为实现此目标,使用某原型车1∶5缩比简化的铁道罐车车辆进行实验,基于随机减量技术和Morlet小波变换方法来研究空载、不同装载高度及装载不同介质时罐车流固耦合模型的纵向冲击及振动特性。随机减量技术用于获得罐车系统的纵向自由响应信号,然后使用Morlet小波变换方法分析自由振动信号,从而辨识出系统的纵向振动频率及阻尼比。It faces long-term challenges to establish the longitudinal vibration and impact dynamic models of a train consisting of railway tankers considering fluid-structure interaction. In order to realize this goal,a railway tank car model was built with a scale ratio of 1∶ 5. The longitudinal impact and vibration characteristics of this model with different filling ratios of tanker and different types of rice were studied based on the method of random decrement technique（ RDT） and Morlet wavelet transformation（ WT）. Morlet WT was applied to analyze free longitudinal responses of the railway tank car model while these free long itudinal vibration signals were obtained with the random decrement technique（ RDT）,thus the system＇s longitudinal resonance frequencies and damping ratios were identified.

关 键 词：铁道罐车 流固耦合 纵向冲击实验 Morlet小波变换 

分 类 号：U272.4[机械工程—车辆工程]