检索结果-南通市图书馆

A Novel Model for Describing Rail Weld Irregularities and Predicting Wheel-Rail Forces Using a Machine Learning Approach

引用

Computer Modeling in Engineering & sciences 2025年第1期142卷 555-577页

作者： Linlin Sun Zihui Wang Shukun Cui Ziquan Yan Weiping Hu Qingchun Meng State Key Laboratory of High-Speed railway Track System China Academy of Railway Sciences Corporation LimitedBeijing100081China railway Engineering Research Institute China Academy of Railway Sciences Corporation LimitedBeijing100081China School of Aeronautic Science and Engineering Beihang UniversityBeijing100191China

Rail weld irregularities are one of the primary excitation sources for vehicle-track interaction dynamics in modern high-speed *** can cause significant wheel-rail dynamic interactions,leading to wheel-rail noise,component damage,and *** researchers have employed the vehicle-track interaction dynamic model to study the dynamic interactions between wheel and rail induced by rail weld geometry ***,the cosine wave model used to simulate rail weld irregularities mainly focuses on the maximum value and neglects the geometric *** this study,novel theoretical models were developed for three categories of rail weld irregularities,based on measurements of the high-speed railway from Beijing to *** vertical dynamic forces in the time and frequency domains were compared under different running *** forces generated by the rail weld irregularities that were measured and modeled,respectively,were compared to validate the accuracy of the proposed ***,based on the numerical study,the impact force due to rail weld irrregularity is modeled using an Artificial Neural Network(ANN),and the optimum combination of parameters for this model is *** results showed that the proposed model provided a more accurate wheel/rail dynamic evaluation caused by rail weld irregularities than that established in the *** ANN model used in this paper can effectively predict the impact force due to rail weld irrregularity while reducing the computation time.

关键词： Rail weld irregularity high-speed railway vehicle-track coupled dynamics wheel/rail dynamic vertical force artificial neural networks

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research on evaluation of basic railway safety management capability based on combination weighting–TOPSIS

引用

railway sciences 2025年第1期4卷 108-122页

作者： Yankun Qi Xiaoyu Li Jinghui Liu Hanqiu Li Chen Yang railway Safety Research Center China Academy of Railway Sciences Corporation LimitedBeijingChina

Purpose–To systematically characterize and objectively evaluate basic railway safety management capability,creating a closed-loop management approach which allows continuous improvement and ***/methodology/approach–A basic railway safety management capability evaluation index system based on a comprehensive analysis of national safety management standards,railway safety rules and regulations and existing safety data from railway transport enterprises is *** system comprises a guideline layer including safety committee formation,work safety responsibility,safety management organization and safety rules and regulations as its components,along with an index layer consisting of 12 quantifiable *** theory combination weighting is utilized to integrate subjective and objective weight values derived using AHP and CRITIC methods and further combined using the TOPSIS method in order to construct a comprehensive basic railway safety management capability evaluation ***–The case study presented demonstrates that this evaluation index system and comprehensive evaluation model are capable of effectively characterizing and evaluating basic railway safety management capability and providing directional guidance for its sustained ***/value–Construction of an evaluation index system that is quantifiable,generalizable and accessible,accurately reflects the main aspects of railway transportation enterprises’basic safety management capability and provides interoperability across various railway transportation *** application of the game theoretic combination weighting method to derive composite weights which combine experts’subjective evaluations with the objectivity of data.

关键词： railway transportation enterprises Basic safety management capability Evaluation index system Combination weighting

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Mechanical Properties of railway High-strength Manufactured Sand Concrete: Typical Lithology, Stone Powder Content and Strength Grade

引用

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 194-203页

作者： WANG Zhen LI Huajian HUANG Fali YANG Zhiqiang WEN Jiaxin SHI Henan railway Engineering Research Institute China Academy of Railway Science Corporation LimitedBeijing 100081China State Key Laboratory for Track Technology of High-Speed railway Beijing 100081China

In order to achieve the large-scale application of manufactured sand in railway high-strength concrete structure,a series of high-strength manufactured sand concrete(HMC)are prepared by taking the manufactured sand lithology(tuff,limestone,basalt,granite),stone powder content(0,5%,10%,15%)and concrete strength grade(C60,C80,C100)as *** evolution of mechanical properties of HMC and the correlation between cubic compressive strength and other mechanical properties are *** to river sand,manufactured sand enhances the cubic compressive strength,axial compressive strength and elastic modulus of concrete,while its potential microcracks weaken the flexural strength and splitting tensile strength of *** powder content displays both positive and negative effects on mechanical properties of HMC,and the stone powder content is suggested to be less than 10%.The empirical formulas between cubic compressive strength and other mechanical properties are proposed.

关键词： manufactured sand concrete railway mechanical property lithology stone powder content

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research on the rapid diagnosis method for hunting of high-speed trains

引用

railway sciences 2025年第1期4卷 1-21页

作者： Wanru Xie Yixin Zhao Gang Zhao Fei Yang Zilong Wei Jinzhao Liu Infrastructure Inspection Research Institute China Academy of Railway Sciences Corporation LimitedBeijingChina Infrastructure Inspection Center China Railway CorpBeijingChina Infrastructure Inspection Institute China Academy of Railway Sciences Corporation LimitedBeijingChina

Purpose–High-speed turnouts are more complex in structure and thus may cause abnormal vibration of highspeed train car body,affecting driving safety and passenger riding ***,it is necessary to analyze the data characteristics of continuous hunting of high-speed trains passing through turnouts and propose a diagnostic method for engineering ***/methodology/approach–First,Complete Ensemble Empirical Mode Decomposition with Adaptive Noise(CEEMDAN)is performed to determine the first characteristic component of the car body’s lateral ***,the Short-Time Fourier Transform(STFT)is performed to calculate the marginal ***,the presence of a continuous hunting problem is determined based on the results of the comparison calculations and diagnostic *** improve computational efficiency,permutation entropy(PE)is used as a fast indicator to identify turnouts with potential ***–Under continuous hunting conditions,the PE is less than 0.90;the ratio of the maximum peak value of the signal component to the original signal peak value exceeded 0.7,and there is an energy band in the STFT time-frequency map,which corresponds to a frequency distribution range of 1–2 ***/value–The research results have revealed the lateral vibration characteristics of the high-speed train’s car body during continuous hunting when passing through *** this basis,an effective diagnostic method has been *** a focus on practical engineering applications,a rapid screening index for identifying potential issues has been proposed,significantly enhancing the efficiency of diagnostic processes.

关键词： High-speed railway Periodic hunting Rapid diagnosis CEEMDAN STFT Permutation entropy Paper type Research paper

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research on expansion joint for high-speed railway long-span bridges in china

引用

railway sciences 2025年第1期4卷 52-81页

作者： Hui Guo Jinzhou Jiang Suoting Hu Chun Yang Qiqi Xiang Kou Luo Xinxin Zhao Bing Li Ziquan Yan Liubin Niu Jianye Zhao china academy of railway sciences corporation limited Railway Engineering Research InstituteBeijingChina and State Key Laboratory for Track System of High-speed RailwayChina Academy of Railway Sciences Corporation LimitedBeijingChina china academy of railway sciences corporation limited Railway Engineering Research InstituteBeijingChina CMCU Engineering Co. Ltd.China National Machinery Industry CorporationChongqingChina First Design Department China Railway Group LtdMajor Bridge Reconnaissance and Design InstituteWuhanChina State Key Laboratory for Track System of High-speed railway China Academy of Railway Sciences Corporation LimitedBeijingChina and China Academy of Railway Sciences Corporation LimitedRailway Engineering Research InstituteBeijingChina Ma'anshan Yangtze River Bridge Headquarters Ning'an Railway Co.Ltd.China Railway Shanghai GroupMa'anshanChina china academy of railway sciences corporation limited Infrastructure Inspection Research InstituteBeijingChina'

Purpose–The bridge expansion joint(BEJ)is a key device for accommodating spatial displacement at the beam end,and for providing vertical support for running trains passing over the gap between the main bridge and the approach *** long-span railway bridges,it must also be coordinated with rail expansion joint(REJ),which is necessary to accommodate the expansion and contraction of,and reducing longitudinal stress in,the *** main aim of this study is to present analysis of recent developments in the research and application of BEJs in high-speed railway(HSR)long-span bridges in china,and to propose a performance-based integral design method for BEJs used with REJs,from both theoretical and engineering ***/methodology/approach–The study first presents a summary on the application and maintenance of BEJs in HSR long-span bridges in china representing an overview of their state of *** of a survey of typical BEJ faults were analyzed,and field testing was conducted on a railway cable-stayed bridge in order to obtain information on the major mechanical characteristics of its BEJ under train *** on the above,a performance-based integral design method for BEJs with maximum expansion range 1600 mm(±800 mm),was proposed,covering all stages from overall conceptual design to consideration of detailed structural design *** performance of the novel BEJ design thus derived was then verified via theoretical analysis under different scenarios,full-scale model testing,and field testing and ***–Two major types of BEJs,deck-type and through-type,are used in HSR long-span bridges in *** BEJ faults were found to mainly include skewness of steel sleepers at the bridge gap,abnormally large longitudinal frictional resistance,and flexural deformation of the scissor *** faults influence BEJ functioning,and thus adversely affect track quality and train running performance at the beam *** to th

关键词： High-speed railway(HSR) Long-span bridge Bridge expansion joint(BEJ) Integral design Rail expansion joint(REJ) Overall stiffness Longitudinal frictional resistance

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Parameter influence analysis and optimization of wheel–rail creepage characteristics in high-speed railway curves

引用

railway sciences 2025年第1期4卷 37-51页

作者： Bolun An Jiapeng Liu Guang Yang Feng shou Liu Tong Shi Ming Zhai Metals and Chemistry Research Institute China Academy of Railway Sciences Corporation LimitedBeijingChina

Purpose–To investigate the influence of vehicle operation speed,curve geometry parameters and rail profile parameters on wheel–rail creepage in high-speed railway curves and propose a multi-parameter coordinated optimization strategy to reduce wheel–rail contact fatigue ***/methodology/approach–Taking a small-radius curve of a high-speed railway as the research object,field measurements were conducted to obtain track parameters and wheel–rail profiles.A coupled vehicle-track dynamics model was *** numerical experiments were designed using the Latin Hypercube Sampling method to extract wheel-rail creepage indicators and construct a parameter-creepage response surface ***–Key service parameters affecting wheel–rail creepage were identified,including the matching relationship between curve geometry and vehicle speed and rail profile *** influence patterns of various parameters on wheel–rail creepage were revealed through response surface analysis,leading to the establishment of parameter optimization ***/value–This study presents the systematic investigation of wheel–rail creepage characteristics under multi-parameter coupling in high-speed railway curves.A response surface-based parameter-creepage relationship model was established,and a multi-parameter coordinated optimization strategy was *** research findings provide theoretical guidance for controlling wheel–rail contact fatigue damage and optimizing wheel–rail profiles in high-speed railway curves.

关键词： High-speed railway Curve track Wheel-rail creepage Parameter analysis Response surface methodology Optimization design

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Study on the improvement of semi-Hertzian wheel/rail contact algorithms

引用

Journal of Traffic and Transportation Engineering(English Edition) 2025年第01期 23-33页

作者： Yaru Liang Qunsheng Wang Jing Zeng Bin Zhu Rancheng Mao State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong University Urban Rail Transit Center of CARS China Academy of Railway Sciences Corporation Limited

The normal stress distribution of the contact patch is the base for wheel/rail dynamic analysis as well as the wheel wear calculation. When the wheel polygonalization appears on the worn-type wheel tread of the high-speed trains, the lateral and longitudinal relative wheel/rail curvature around the contact patch will vary with the change of wheel circumferential position. In such a case, the commonly used Hertzian contact method cannot meet the calculation precision, while even the non-Hertzian method has relatively high precision, but its calculation efficiency cannot meet the demand of engineering application. A non-Hertzian method was introduced to analyze the influence of the wheel polygonalization on the contact patch. By studying the shape and the pressure distribution of the contact patches at different contact positions, it is found that when the wavelength of the wheel polygonalization is larger than 65 mm, the results of the improved semiHertzian method can agree well with the non-Hertzian method with reasonable computing time. Besides, to ensure that the calculation result can meet the accuracy requirement when the wheelset yaw motion occurs, the trace method is used to improve the semi-Hertzian method and verified by the contact method.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

The evolution and development of railway passenger transportation clearing method in china

引用

railway sciences 2025年第1期4卷 97-107页

作者： Yin Zhou Wei Fang Yan Xu Huaixiang Wang Lu Liu Transportation and Economics Research Institute China Academy of Railway Sciences Corporation LimitedBeijingChina Passenger Transport Department China State Railway Group Co.Ltd.BeijingChina Transportation and Economics Research Institute China Academy of Railway Sciences Corporation LimitedBeijingChina 1

Purpose–As an important part of the management of railway passenger transport,the rationality and effectiveness of the clearing method of railway passenger transport are directly related to the operating efficiency and service quality of railway passenger transport *** paper aims to comprehensively and deeply discuss the evolution and development process of china’s railway passenger transport clearing method,analyze its characteristics and influences in each stage,identify the main factors affecting its evolution and development and then put forward thoughts on improving the future development of the clearing ***/methodology/approach–Through a detailed review of the railway passenger transport clearing methods from the planned economy period to the reform and opening up period and into the new century,the basis,mode,subject and object of clearing in different development stages are systematically ***–It comprehensively reveals the evolution of the clearing method,sorted out the characteristics and changes of the clearing method at each stage and the adaptability to the development of railway passenger transport at that *** characteristics of the development of clearing measures for railway passenger transport in different stages and their far-reaching influence on railway passenger transport business are deeply ***/value–This paper summarized the factors influencing the development of china’s railway passenger transportation clearing approach evolution,including the simplified rules of clearing,enhanced the market adaptability,establishing and perfecting the incentive mechanism,strengthening the construction of informatization,*** paper puts forward the ways to improve the railway passenger transportation clearing future development thinking.

关键词： railway transport railway passenger transport business Carrier system Clearing method Evolution and development

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Finite element analysis and experimental study on the sealing performance of low-phenyl silicone rubber sealing rings

引用

railway sciences 2025年第1期4卷 123-137页

作者： Ming Gao Dongkai Li Kun Liu Shuliang Xu Feng Zhao Ben Guo Anhui Pan Xiao Xie Huanre Han Metals and Chemistry Research Institute China Academy of Railway Sciences Corporation LimitedBeijingChina Department of Locomotive and Car China State Railway Group Company LimitedBeijingChina Rolling Stock Department China Railway Harbin Group Company LimitedHarbinChina

Purpose–The brake pipe system was an essential braking component of the railway freight trains,but the existing E-type sealing rings had problems such as insufficient low-temperature resistance,poor heat stability and short service *** address these issues,low-phenyl silicone rubber was prepared and tested,and the finite element analysis and experimental studies on the sealing performance of its sealing rings were carried ***/methodology/approach–The low-temperature resistance and thermal stability of the prepared lowphenyl silicone rubber were studied using low-temperature tensile testing,differential scanning calorimetry,dynamic thermomechanical analysis and thermogravimetric *** sealing performance of the lowphenyl silicone rubber sealing ring was studied by using finite element analysis software abaqus and ***–The prepared low-phenyl silicone rubber sealing ring possessed excellent low-temperature resistance and thermal *** to the finite element analysis results,the finish of the flange sealing surface and groove outer edge should be ensured,and extrusion damage should be *** sealing rings were more susceptible to damage in high compression ratio and/or low-temperature *** the sealing effect was ensured,a small compression ratio should be selected,and rubbers with hardness and elasticity less affected by temperature should be *** prepared low-phenyl silicone rubber sealing ring had zero leakage at both room temperature(RT)and�***/value–The innovation of this study is that it provides valuable data and experience for the future development of the sealing rings used in the brake pipe flange joints of the railway freight cars in china.

关键词： Low-phenyl silicone rubber Sealing ring Sealing performance Finite element analysis Leakage

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cooperative maximum adhesion tracking control for multi-motor electric locomotives

引用

railway sciences 2025年第1期4卷 22-36页

作者： Leiting Zhao Yongxiang Wang Kan Liu Liran Li Jingyuan Zhan Qingliang Liu AC Transmission Department China Academy of Railway Sciences Corporation LimitedBeijingChina School of Information Science and Technology Beijing University of TechnologyBeijingChina

Purpose–This study aims to propose a cooperative adhesion control method for trains with multiple motors electric *** method is intended to optimize the output torque of each motor,maximize the utilization of train adhesion within the total torque command,reduce the train skidding/sliding phenomenon and achieve optimal adhesion utilization for each axle,thus realizing the optimal allocation of the multi-motor electric ***/methodology/approach–In this study,a model predictive control(MPC)-based cooperative maximum adhesion tracking control method for multi-motor electric locomotives is ***,train traction system with multiple motors is constructed in accordance with Newton’s second *** equations include the train dynamics equations,the axle dynamics equations,and the wheel-rail adhesion coefficient ***,a new MPC-based multi-axle adhesion co-optimization method is put *** method calculates the optimal output torque through real-time iteration based on the known reference slip speed to achieve multi-axle co-optimization under different ***–This paper presents a MPC system designed for the cooperative control of multi-axle *** results indicate that the proposed control system is able to optimize the adhesion of multiple axles under numerous different conditions and achieve the optimal power distribution based on the reduction of train skidding/***/value–This study presents a novel cooperative adhesion tracking control *** is designed for multi-motor electric locomotives,which has rarely been studied *** simulations are carried out in different conditions,including variable surfaces and motor failing.

关键词： Cooperative control Adhesion control Model predictive control Slip prevent Paper type Research paper

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：