CAJ | 학술논문

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。
고필류고우합작용하건립유철도관차조성적열차적종향진동급충격모형적방법잉연시해영역연구장기면림적도전。위실현차목표，사용모원형차1∶5축비간화적철도관차차량진행실험，기우수궤감량기술화 Morlet 소파변환방법래연구공재、불동장재고도급장재불동개질시관차류고우합모형적종향충격급진동특성。수궤감량기술용우획득관차계통적종향자유향응신호，연후사용 Morlet 소파변환방법분석자유진동신호，종이변식출계통적종향진동빈솔급조니비。
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.