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车桥耦合动力分析方法及验证

张楠, 田园, 夏禾

《工程(英文)》 2016年 第2卷 第4期   页码 528-536 doi: 10.1016/J.ENG.2016.04.012

摘要:

本文系统研究了车桥耦合动力系统的分析方法。随着铁路技术的发展,车桥耦合动力分析日臻成熟, 此类研究对评判桥梁设计方案、确保列车运行的安全性与平稳性具有重要意义。车桥耦合动力研 究中考虑轨道不平顺、结构变形、风荷载、撞击荷载、结构损伤、基础冲刷和地震等因素的影响, 其研究方法主要包括解析法、数值模拟法以及试验研究法三类。本文的车辆子系统模型以刚体动 力学方法建立,桥梁子系统模型以有限元方法建立,竖向与横向轮轨关系分别以轮轨密贴假定和 Kalker 线性蠕滑理论定义。车桥耦合动力方程以全过程迭代法求解。算例讨论了CRH380BL 高速 列车通过我国标准设计桥梁的动力响应,计算了车速200~400 km·h-1 范围内车辆与桥梁子系统的 动力响应,并分析了振动发生的机理。

关键词: 车桥耦合系统     轮轨关系     全过程迭代法     现场试验     验证    

Vibration analysis of medium and small span bridges subjected to mixed marshalling freight trains

LI Qi, WU Dingjun, HUANG Xiaobin

《结构与土木工程前沿(英文)》 2008年 第2卷 第2期   页码 133-138 doi: 10.1007/s11709-008-0019-5

摘要: It has been reported several times that train derailment occurs when mixed marshalling freight trains traverse bridges at high speeds in China. This study aims to explain this phenomenon numerically based on the train-bridge coupling vibration theory and its associated computer program. The train-bridge vibration characteristic is analyzed by a computer program when mixed marshalling freight trains traverse 32-meter-span prestressed concrete simple beam bridges. The mechanism that dynamic responses of the bridges are prominent and that empty trains are inclined to derail are derived from the dynamic responses analysis. The analysis indicates that the significant differences of axle loads between heavy vehicles and empty vehicles produce periodic forced loadings of large amplitudes. These periodic loadings cause severe vibration of bridges. In turn, severe vibration of the bridges produces intensive counteraction to empty vehicles.

关键词: train-bridge vibration     vibration characteristic     associated computer     train-bridge     phenomenon    

Analysis on running safety of train on the bridge considering sudden change of wind load caused by wind

Tian ZHANG, He XIA, Weiwei GUO

《结构与土木工程前沿(英文)》 2018年 第12卷 第4期   页码 558-567 doi: 10.1007/s11709-017-0455-1

摘要: The calculation formulae for change of wind load acting on the car-body are derived when a train moves into or out of the wind barrier structure, the dynamic analysis model of wind-vehicle-bridge system with wind barrier is established, and the influence of sudden change of wind load on the running safety of the train is analyzed. For a 10-span simply-supported U-shaped girder bridge with 100 m long double-side 3.5 m barrier, the response and the running safety indices of the train are calculated. The results are compared with those of the case with wind barrier on the whole bridge. It is shown that the sudden change of wind load caused by wind barrier has significant influence on the lateral acceleration of the car-body, but no distinct on the vertical acceleration. The running safety indices of train vehicle with sectional wind barriers are worse than those with full wind barriers, and the difference increases rapidly with wind velocity.

关键词: wind barrier     sudden change of wind load     dynamic response     running safety     comfort    

Dynamic response of a long span suspension bridge and running safety of a train under wind action

GUO Weiwei, XIA He, XU You-lin

《结构与土木工程前沿(英文)》 2007年 第1卷 第1期   页码 71-79 doi: 10.1007/s11709-007-0007-1

摘要: A dynamic analysis model of a wind-train-bridge system is established. The wind excitations of the system are the buffeting and self-excited forces simulated in time domain using measured aerodynamic coefficients and flutter derivatives. The proposed formulations are then applied to a long rail-cum-road suspension bridge. The dynamic responses of the bridge and the train under wind action are analyzed. The results show that the lateral and rotational displacements of the bridge are dominated by wind, while the vertical by the gravity loading of the moving train. The running safeties of the train vehicles are much affected by wind. Under wind conditions of 30 40 m/s, the offload factors, derail factors and overturn factors of the train vehicles exceed the safety allowances, to which great attention should be paid.

关键词: rotational     offload     vertical     m/s     attention    

Aerodynamic impact of train-induced wind on a moving motor-van

Jiajun HE; Huoyue XIANG; Yongle LI; Bin HAN

《结构与土木工程前沿(英文)》 2022年 第16卷 第7期   页码 909-927 doi: 10.1007/s11709-022-0833-1

摘要: The newly-built single-level rail-cum-road bridge brings the issue of the aerodynamic impact of train-induced wind on road automobiles. This research introduced a validated computational fluid dynamics (CFD) model regarding this concern. Such an aerodynamic impact mechanism was explored; a relationship between the transverse distance between train and motor-van (hereinfafter referred to as van) and the aerodynamic effects on the van was explored to help the optimization of bridge decks, and the relationship between the automobile speed and aerodynamic variations of a van was fitted to help traffic control. The fitting results are accurate enough for further research. It is noted that the relative speed of the two automobiles is not the only factor that influences the aerodynamic variations of the van, even at a confirmed relative velocity, the aerodynamic variations of the van vary a lot as the velocity proportion changes, and the most unfavorable case shows an increase of over 40% on the aerodynamic variations compared to the standard case. The decay of the aerodynamic effects shows that not all the velocity terms would enhance the aerodynamic variations; the coupled velocity term constrains the variation amplitude of moments and decreases the total amplitude by 20%–40%.

关键词: rail-cum-road bridge     aerodynamic impact     train-induced wind     CFD     aerodynamic force     quantitative analysis     fitting    

Running train induced vibrations and noises of elevated railway structures and their influences on environment

He XIA, Fei GAO, Xuan WU, Nan ZHANG, Guido DE ROECK, Geert DEGRANDE

《结构与土木工程前沿(英文)》 2009年 第3卷 第1期   页码 9-17 doi: 10.1007/s11709-009-0010-9

摘要: The vibrations and noises of elevated railway structures have been cause for concern due to their effects on the environment and the people living near elevated lines. In this paper, the main structural features of some new elevated bridges and station hall were introduced. The generation mechanism of vibrations and noise of elevated structures induced by trains were investigated. The noise induced by different types of elevated bridges, their influences on the environment and the theoretical method for the analysis of structure borne noise was analyzed. Finally, several field measurements on train induced noises at the platforms of elevated subway stations and bridges were presented.

关键词: railway     elevated structure     bridge     station     vibration     noise     environment    

高速动车组列车牵引仿真计算技术研究

康熊

《中国工程科学》 2011年 第13卷 第1期   页码 62-68

摘要:

随着我国高速铁路的发展,高速动车组列车牵引仿真计算具有重要意义。对高速动车组的牵引仿真计算的方法进行了研究,分析了与普通列车牵引计算的区别及相关的关键理论。介绍了自主研发的牵引仿真系统的构成和功能。以京沪高速铁路为计算实例,对4种不同的运行方案进行了仿真计算,对线路中的电分相的设置和影响进行了计算分析,并以京沪高速铁路先导试验段的冲高速试验为对象进行了模拟仿真。多次实际应用表明提出的高速动车组牵引仿真计算的方法具有良好的仿真精度和实用意义, 可以为我国高速铁路工程建设提供有效的手段,并据此提出了今后的发展方向。

关键词: 高速     动车组     牵引     仿真计算    

Robust train speed trajectory optimization: A stochastic constrained shortest path approach

Li WANG, Lixing YANG, Ziyou GAO, Yeran HUANG

《工程管理前沿(英文)》 2017年 第4卷 第4期   页码 408-417 doi: 10.15302/J-FEM-2017042

摘要: Train speed trajectory optimization is a significant issue in railway traffic systems, and it plays a key role in determining energy consumption and travel time of trains. Due to the complexity of real-world operational environments, a variety of factors can lead to the uncertainty in energy-consumption. To appropriately characterize the uncertainties and generate a robust speed trajectory, this study specifically proposes distance-speed networks over the inter-station and treats the uncertainty with respect to energy consumption as discrete sample-based random variables with correlation. The problem of interest is formulated as a stochastic constrained shortest path problem with travel time threshold constraints in which the expected total energy consumption is treated as the evaluation index. To generate an approximate optimal solution, a Lagrangian relaxation algorithm combined with dynamic programming algorithm is proposed to solve the optimal solutions. Numerical examples are implemented and analyzed to demonstrate the performance of proposed approaches.

关键词: train speed trajectory optimization     railway operation     stochastic programming    

Machine learning for fault diagnosis of high-speed train traction systems: A review

《工程管理前沿(英文)》 doi: 10.1007/s42524-023-0256-2

摘要: High-speed trains (HSTs) have the advantages of comfort, efficiency, and convenience and have gradually become the mainstream means of transportation. As the operating scale of HSTs continues to increase, ensuring their safety and reliability has become more imperative. As the core component of HST, the reliability of the traction system has a substantially influence on the train. During the long-term operation of HSTs, the core components of the traction system will inevitably experience different degrees of performance degradation and cause various failures, thus threatening the running safety of the train. Therefore, performing fault monitoring and diagnosis on the traction system of the HST is necessary. In recent years, machine learning has been widely used in various pattern recognition tasks and has demonstrated an excellent performance in traction system fault diagnosis. Machine learning has made considerably advancements in traction system fault diagnosis; however, a comprehensive systematic review is still lacking in this field. This paper primarily aims to review the research and application of machine learning in the field of traction system fault diagnosis and assumes the future development blueprint. First, the structure and function of the HST traction system are briefly introduced. Then, the research and application of machine learning in traction system fault diagnosis are comprehensively and systematically reviewed. Finally, the challenges for accurate fault diagnosis under actual operating conditions are revealed, and the future research trends of machine learning in traction systems are discussed.

关键词: high-speed train     traction systems     machine learning     fault diagnosis    

Metro train rescheduling by adding backup trains under disrupted scenarios

Jiateng YIN, Yihui WANG, Tao TANG, Jing XUN, Shuai SU

《工程管理前沿(英文)》 2017年 第4卷 第4期   页码 418-427 doi: 10.15302/J-FEM-2017044

摘要: In large cities with heavily congested metro lines, unexpected disturbances often occur, which may cause severe delay of multiple trains, blockage of partial lines, and reduction of passenger service. Metro dispatchers have taken a practical strategy of rescheduling the timetable and adding several backup trains in storage tracks to alleviate waiting passengers from crowding the platforms and recover from such disruptions. In this study, we first develop a mixed integer programming model to determine the optimal train rescheduling plan with considerations of in-service and backup trains. The aim of train rescheduling is to frequently dispatch trains to evacuate delayed passengers after the disruption. Given the nonlinearity of the model, several linearization techniques are adapted to reformulate the model into an equivalent linear model that can be easily handled by the optimization software. Numerical experiments are implemented to verify the effectiveness of the proposed train rescheduling approach.

关键词: train rescheduling     backup train     metro line     disruption     timetable    

Coupling analysis of passenger and train flows for a large-scale urban rail transit system

《工程管理前沿(英文)》 2023年 第10卷 第2期   页码 250-261 doi: 10.1007/s42524-021-0180-2

摘要: Coupling analysis of passenger and train flows is an important approach in evaluating and optimizing the operation efficiency of large-scale urban rail transit (URT) systems. This study proposes a passenger–train interaction simulation approach to determine the coupling relationship between passenger and train flows. On the bases of time-varying origin–destination demand, train timetable, and network topology, the proposed approach can restore passenger behaviors in URT systems. Upstream priority, queuing process with first-in-first-serve principle, and capacity constraints are considered in the proposed simulation mechanism. This approach can also obtain each passenger’s complete travel chain, which can be used to analyze (including but not limited to) various indicators discussed in this research to effectively support train schedule optimization and capacity evaluation for urban rail managers. Lastly, the proposed model and its potential application are demonstrated via numerical experiments using real-world data from the Beijing URT system (i.e., rail network with the world’s highest passenger ridership).

关键词: urban rail transit     coupling analysis     passenger–train interaction     large-scale simulation    

Pollution survey of carbonyl compounds in train air

LU Hao, ZHU Lizhong

《环境科学与工程前沿(英文)》 2007年 第1卷 第1期   页码 125-128 doi: 10.1007/s11783-007-0023-3

摘要: The train is an important vehicle in China, but its air quality has important impacts on passengers health. In this work, pollution from carbonyl compounds was measured in the air of six trains. The objectives of this work were to investigate carbonyl compound levels in selected air from trains, identify their emission sources, and assess the intake of carbonyl compounds for passengers. The methods for sampling and analyzing 10 carbonyl compounds such as formaldehyde, acetaldehyde, acrolein, acetone, propionaldehyde, crotonaldehyde, butyraldehyde, benzaldehyde, cyclohexanone, and valeraldehyde in indoor air were proposed with the sampling efficiency, recovery, and detection limit being 92% 100%, 91% 104%, and 0.26 0.82 ng/m, respectively. It was indicated that the total concentrations of carbonyl compounds were 0.159 0.2828 mg/m with the average concentration of 0.2330 mg/m. The average concentrations of formaldehyde, acetaldehyde and acetone were 0.0922, 0.0499, and 0.0580 mg/m, accounting for 42.6%, 21.4%, and 24.9% of the total concentrations of carbonyl compounds, respectively. The carbonyl compounds probably came from woodwork and cigarette smoking. The intake of carbonyl compounds for the passengers was approximately 0.043 0.076 mg/h. The carbonyl compounds in train air could be harmful to human health.

如何应对列车控制系统革新?

Hideo Nakamura

《工程(英文)》 2016年 第2卷 第3期   页码 380-386 doi: 10.1016/J.ENG.2016.03.015

摘要:

列车控制系统的作用是确保铁路的安全。本文首先总结了日本、欧洲通用的列车控制系统,在此基础上,笔者根据现有列车控制系统,提出以下问题:应该采用什么方法来提高列车控制系统的功能性、安全性和可靠性,并协助铁路的商业运营?其次,笔者提出了一个有助于基于当前信息和通信技术对新型列车控制系统进行开发的理想架构;同时,还提出了一种新的统一列车控制系统(UTCS),它能有效地提高列车控制系统的鲁棒性和竞争力。UTCS 的最终架构仅由基本设备组成,如铁轨中的转辙机和铁路道口控制设备。最后讨论了UTCS 在应用中的处理方式。

关键词: 列车控制系统     铁路信号     基于无线通信的列车自动控制系统     列车自动防护系统     闭塞系统    

Experimental and computational validation of a scaled train tunnel model using modal analysis

Janice B. D’SOUZA, Sangarapillai KANAPATHIPILLAI

《机械工程前沿(英文)》 2013年 第8卷 第4期   页码 420-428 doi: 10.1007/s11465-013-0281-7

摘要:

Acoustic engineers are faced with the challenge of minimising reverberation time in their designs so as to contribute to the health and well-being of those traveling by train and those on the platforms. Although the problem is easy to identify, it is not as simple to solve. The acoustical environment of a train tunnel is complex, with a variety of noise contributing factors such as train announcements, speech of commuters, ventilation systems, electrical equipment and wheel and rail noise. As a result, there is some difficulty in modeling the complete acoustic environment with computational or acoustic first principles. In this study, an experimental rig was constructed to model the acoustic behavior within a tunnel. The modal properties for the 300 Hz to 1500 Hz range, including resonances and mode shapes were identified and were shown to successfully correspond to theoretical results and a computational model created in COMSOL using Finite Element Analysis.

关键词: reverberation time     acoustic environment     modal properties     resonances    

Robust energy-efficient train speed profile optimization in a scenario-based position–time–speed network

《工程管理前沿(英文)》 2021年 第8卷 第4期   页码 595-614 doi: 10.1007/s42524-021-0173-1

摘要: Train speed profile optimization is an efficient approach to reducing energy consumption in urban rail transit systems. Different from most existing studies that assume deterministic parameters as model inputs, this paper proposes a robust energy-efficient train speed profile optimization approach by considering the uncertainty of train modeling parameters. Specifically, we first construct a scenario-based position–time–speed (PTS) network by considering resistance parameters as discrete scenario-based random variables. Then, a percentile reliability model is proposed to generate a robust train speed profile, by which the scenario-based energy consumption is less than the model objective value at α confidence level. To solve the model efficiently, we present several algorithms to eliminate the infeasible nodes and arcs in the PTS network and propose a model reformulation strategy to transform the original model into an equivalent linear programming model. Lastly, on the basis of our field test data collected in Beijing metro Yizhuang line, a series of experiments are conducted to verify the effectiveness of the model and analyze the influences of parameter uncertainties on the generated train speed profile.

关键词: robust train speed profile     percentile reliability model     scenario-based position–time–speed network     mixed-integer programming    

标题 作者 时间 类型 操作

车桥耦合动力分析方法及验证

张楠, 田园, 夏禾

期刊论文

Vibration analysis of medium and small span bridges subjected to mixed marshalling freight trains

LI Qi, WU Dingjun, HUANG Xiaobin

期刊论文

Analysis on running safety of train on the bridge considering sudden change of wind load caused by wind

Tian ZHANG, He XIA, Weiwei GUO

期刊论文

Dynamic response of a long span suspension bridge and running safety of a train under wind action

GUO Weiwei, XIA He, XU You-lin

期刊论文

Aerodynamic impact of train-induced wind on a moving motor-van

Jiajun HE; Huoyue XIANG; Yongle LI; Bin HAN

期刊论文

Running train induced vibrations and noises of elevated railway structures and their influences on environment

He XIA, Fei GAO, Xuan WU, Nan ZHANG, Guido DE ROECK, Geert DEGRANDE

期刊论文

高速动车组列车牵引仿真计算技术研究

康熊

期刊论文

Robust train speed trajectory optimization: A stochastic constrained shortest path approach

Li WANG, Lixing YANG, Ziyou GAO, Yeran HUANG

期刊论文

Machine learning for fault diagnosis of high-speed train traction systems: A review

期刊论文

Metro train rescheduling by adding backup trains under disrupted scenarios

Jiateng YIN, Yihui WANG, Tao TANG, Jing XUN, Shuai SU

期刊论文

Coupling analysis of passenger and train flows for a large-scale urban rail transit system

期刊论文

Pollution survey of carbonyl compounds in train air

LU Hao, ZHU Lizhong

期刊论文

如何应对列车控制系统革新?

Hideo Nakamura

期刊论文

Experimental and computational validation of a scaled train tunnel model using modal analysis

Janice B. D’SOUZA, Sangarapillai KANAPATHIPILLAI

期刊论文

Robust energy-efficient train speed profile optimization in a scenario-based position–time–speed network

期刊论文