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。
Abstract
It is still facing the long-term challenges to establish the longitudinal vibration and impact model of the train consisting of railway tankers considering fluid-structure interaction in this study field. In order to realize this goal, It designed a railway tank car model whose scaling ratio is 1:5. It studyed the longitudinal impact and vibration characteristics of liquid-solid coupling model for the railway tanker in various filling ratio and various quality of rice based on the method of random decrement technique (RDT) and Morlet Wavelet transform（WT）. Morlet WT is applied to analyze the free longitudinal responses of the railway tank car obtained by random decrement technique (RDT), which can identify resonance frequencies and damper ratio of different condition.
关键词
铁道罐车
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流固耦合 /
纵向冲击实验 /
Morlet小波变换
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Key words
railway tank car
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fluid-structure interaction /
rail impact testing /
Morlet Wavelet transform
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参考文献
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