Analysis of vehicle vibration transfer characteristics based on flexible vehicle system and OTPA method

被引：0
|
作者：
Guo B.-B. [1 ]
Luo Z.-X. [1 ]
Xiao Q. [2 ]
Cheng Y.-Q. [2 ,3 ]
Yang Y.-H. [2 ]
Zhu E.-H. [2 ]
机构：
[1] State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive, CRRC Zhuzhou Locomotive Co., Ltd., Hunan, Zhuzhou
[2] State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure, East China Jiao tong University, Jiangxi, Nanchang
[3] School of Vehicle Engineering, Jiangxi Vocational College of Mechanical and Electrical Technology, Jiangxi, Nanchang
来源：
Jiaotong Yunshu Gongcheng Xuebao/Journal of Traffic and Transportation Engineering | 2024年 / 24卷 / 02期
基金：
中国国家自然科学基金;
关键词：
OPTA; rail transit; flexible vehicle system; rigid body model; transfer path; vertical irregularity of steel rail; wheel polygon;
D O I：
10.19818/j.cnki.1671-1637.2024.02.012
中图分类号：
学科分类号：
摘要：
In order to accurately analyze the vibration characteristics and transfer rules of rail vehicles in the wide frequency domain, a scheme for operational transfer path analysis (OTPA) based on a dynamics simulation model of a flexible vehicle system was proposed. A dynamics model of a flexible vehicle system including flexible wheelsets, frame, and vehicle body, as well as a rigid body model with identical structural parameters was established. The vibration characteristics of the wheelset, frame, and vehicle body were studied from the perspective of time domain. The simulation results were compared with the measured data to explore the effect of flexible treatment on vehicle vibration. The attenuation law of vibration energy was obtained. Meanwhile, the vibration characteristics of the flexible vehicle system under the excitation of measured vertical irregularities of steel rails were investigated from the perspective of the frequency domain. The OTPA method was used to simulate and analyze the main transfer path of vertical vibration in the bottom-up vibration transfer process of the vehicle system from wheelset to frame and vehicle body under complex condition of vertical irregularities of steel rails combined with wheel polygon. Research results indicate that the flexible treatment method of the vehicle system has a significant impact on vehicle vibration. Compared with the rigid body model, the vibration accelerations of wheelsets, frame, and vehicle body in the flexible vehicle system model are closer to measured values in the mid-to-low frequency range. The maximum vibration amplitudes of axle box, frame, and vehicle body are 250-450, 30-40, and 3-4m • s 2 , respectively. The vibration amplitude attenuates by an order of magnitude from the wheelsets to the frame and vehicle body. The sperling index of the flexible vehicle system model is greater than that of the rigid body model, and the trend becomes more obvious as the speed increases. The impact of a vehicle’s flexible vibrationon the operational performance increases with the increase in speed. Under complex working conditions, the vibration of the vehicle system is mainly transferred to the frame through a series of steel springs, and then transferred to the interior floor through air springs and traction rods. © 2024 Chang'an University. All rights reserved.
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页码：179 / 192
页数：13
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