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Experimental Study on Rotation Resistance co.fficient of Motor Bogie for Type A Vehicle

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Journal of Harbin Institute of Technology(New Series) 2019年第2期26卷 90-96页

作者： Fuxing Tan Hongtao Liu Shihui Liu Zhenchuan Zhang Peng Zhang railway vehicles Laboratory CRRC Changchun Railway Vehicles Co.Ltd.

Rotation resistance co.fficient is an important operating parameter for vehicle bogies, which influences the dynamic behavior of vehicles directly. A research on the rotation resistance co.fficient of type A vehicle motor bogies was co.ducted by means of theoretical calculation, dynamic simulation, test certification, and so on. Result of the simulation analysis shows that the rotation resistance co.fficient relates to air springs stiffness and negotiated curve radii, and it varies proportionally with the change of air springs horizontal stiffness. The greater the rotation angle is, the greater the factor beco.es. The certifications made under the operating co.ditions(e.g., different air spring status, different rotation speeds) indicate that the rotation resistance co.fficient increases with the increase of the rotation speed. The anti-yaw dampers can co.tribute to the rotation resistance torque acted on bogie, and the greater the rotation speeds are, the greater the torque generated by the anti-yaw dampers is. The results suggest that the theoretical analysis and dynamics simulation are in acco.dance with the results from the bogie bench tests, which meet the requirements in EN14363 and the indicators in vehicles safe operation.

关键词： type A vehicle motor bogie rotation angle rotation resistance co.fficient rotation speed

Application and development of friction stir welding technology in high speed EMU manufacturing

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China Welding 2018年第4期27卷 57-62页

作者：刘杰 CRRC Changchun Railway Vehicles Co. Ltd.

The application status of friction stir welding technology is introduced,and the application research of advanced FSW technology in the manufacture of high-speed electric multiple unit aluminum alloy body is analyzed,including the application of traditional friction stir welding technology to a co.bination of a lap joint and butt joint,and butt joint of large thick plate by both sides process,also introduces bobbin-tool friction stir welding to a butt joint and three-dimensional space curved friction stir welding to T-joint. At the same time the future development trend of new FSW technology derived from traditional FSW technology in rail vehicle manufacturing industry is put forward. As the fast developing of critical technology used on railway vehicles,quick applying advanced welding technology will affect products quality,manufacturing co.t and production cycle time directly,and it certainly will be one of the approaches to develop markets by all the railway vehicles manufacturing enterprises.

关键词： friction stir welding high speed electric multiple unit application development

Development and engineering application of integratedsafety monitoring systems for China’s high-speed trains

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Transportation Safety and Environment 2024年第2期6卷 36-44页

作者： Yan Zhu Tiantian Wang Ruiyuan Shen Jingsong Xie Jingsong Yang Guoqin Zhang Hongqi Tian Xifeng Liang School of Traffic and Transportation Engineering Central South UniversityChangsha 410075HunanChina CRRC Changchun Railway Vehicles Co. LtdChangchun 130062JilinChina China State railway Group co. Ltd.Beijing 100084China

With the improvement of the running speed of China’s high-speed trains,the demands for running status monitoring and security assurance of High-speed Electric Multiple Units(EMU)have increased significantly.However,the current safety monitoring systems are independent,which is not co.ducive to the co.prehensive monitoring and information sharing of the whole vehicle.The temperature monitoring of running gear is insensitive to early failures.How to develop a train operation safety monitoring system with strong engineering implementation and high integration is a key problem to be solved.For the monitoring of running stationarity,frame stability and running gear health of China’s high-speed trains,an integrated safety monitoring system framework is designed,and the logic and algorithm for the diagnosis of stationarity,stability and health states of rotating parts are co.structed.Monitoring software which fused the temperature,high and low frequency vibration data is developed,and the design and installation of the vibration temperature co.posite sensors are co.pleted.The research results have realized the integration and co.prehensive processing of multiple monitoring systems,co.pleted the improvement from single co.ponent and vehicle-level safety monitoring to multi-system,train-level and interactive monitoring.In the process of real vehicle application,the developed monitoring system acquires the vehicle operation status data accurately and in real time.The co.structed diagnosis algorithm and logic evaluates the vehicle operation status accurately and in a timely manner,and avoids the progression from fault to accident.The research results show that the integrated safety monitoring system can provide technical support for train operation safety.

关键词： electric multiple units(EMU) integrated safety monitoring system stationarity stability fault diagnosis

High-Speed EMUs:Characteristics of Technological Development and Trends

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Engineering 2020年第3期6卷 234-244页

作者： Hongwei Zhao Jianying Liang Changqing Liu China Academy of railway Sciences co. Ltd.Beijing 100081China crrc Qingdao Sifang co. Ltd.Qingdao 266111China CRRC Changchun Railway Vehicles Co. Ltd.Changchun 130052China

1.A worldwide history of high-speed trains High-speed railway(HSR)is defined by the International Union of railways(UIC)as new lines with design speeds above 250 kmh1 and upgraded existing lines with speeds of up to 200 kmh1[1].In China,HSR is defined as new passenger-dedicated lines designed for electric multiple unit(EMU)trains running at a speed of 250 kmh1 or above(actual or reserved),with an initial operation speed not lower than 200 kmh1[2].The worldwide development of HSRs and high-speed EMUs can be roughly divided into three stages:initial operation,line platform expansion,and rapid development.

关键词： development. railway passenger

A rigid-flexible co.pling finite element model of co.pler for analyzing train instability behavior during co.lision

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railway Engineering Science 2023年第4期31卷 325-339页

作者： Jingke Zhang Tao Zhu Bing Yang Xiaorui Wang Shoune Xiao Guangwu Yang Yanwen Liu Quanwei Che State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610031China changchun railway vehicles co. Ltd.Changchun 130062China crrc Qingdao Sifang co. Ltd.Qingdao 266111China

Rail vehicles generate huge longitudinal impact loads in co.lisions.If unreasonable matching exists between the co.pressive strength of the intermediate co.pler and the structural strength of the car body,the risk of car body structure damage and train derailment will increase.Herein,a four-stage rigid-flexible co.pling finite element model of the co.pler is established co.sidering the co.pler buckling load.The influence of the co.pler buckling load on the train longitudinal-vertical-hori-zontal buckling behavior was studied,and the mechanism of the train horizontal buckling instability in train co.lisions was revealed.Analysis results show that an intermediate co.pler should be designed to ensure that the actual buckling load is less than the co.pressive load when the car body structure begins to deform plastically.The actual buckling load of the co.pler and the asymmetry of the structural strength of the car body in the lateral direction are two important influencing factors for the lateral buckling of a train co.lision.If the strength of the two sides of the car body structure in the lateral direction is asymmetrical,the deformation on the weaker side will be larger,and the end of the car body will begin to deflect under the action of the co.pler force,which in turn causes the train to undergo sawtooth buckling.

关键词： Intermediate co.pler Rigid-flexible co.pling finite element model Design buckling load Actual buckling load Lateral buckling instability

Application of Improved Multi-Objective Ant co.ony Optimization Algorithm in Ship Weather Routing

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Journal of Ocean University of China 2021年第1期20卷 45-55页

作者： ZHANG Guangyu WANG Hongbo ZHAO Wei GUAN Zhiying LI Pengfei State Key Laboratory on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China CRRC Changchun Railway Vehicles Co. Ltd.Changchun 130000China

This paper presents a novel intelligent and effective method based on an improved ant co.ony optimization(Aco.algorithm to solve the multi-objective ship weather routing optimization problem,co.sidering the navigation safety,fuel co.sumption,and sailing time.Here the improvement of the Aco.algorithm is mainly reflected in two aspects.First,to make the classical Aco.algorithm more suitable for long-distance ship weather routing and plan a smoother route,the basic parameters of the algorithm are improved,and new co.trol factors are introduced.Seco.d,to improve the situation of too few Pareto non-dominated solutions generated by the algorithm for solving multi-objective problems,the related operations of crossover,reco.bination,and mutation in the genetic algorithm are introduced in the improved Aco.algorithm.The final simulation results prove the effectiveness of the improved algorithm in solving multi-objective weather routing optimization problems.In addition,the black-box model method was used to study the ship fuel co.sumption during a voyage;the model was co.structed based on an artificial neural network.The parameters of the neural network model were refined repeatedly through the historical navigation data of the test ship,and then the trained black-box model was used to predict the future fuel co.sumption of the test ship.co.pared with other fuel co.sumption calculation methods,the black-box model method showed higher accuracy and applicability.

关键词： multi-objective optimization weather routing Aco.algorithm fuel co.sumption

Study on microstructures and properties of preheated flash butt welded SW400 steel joints

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China Welding 2018年第3期27卷 42-52页

作者：宫廷鹤宫明月孙大千 CRRC Changchun Railway Vehicles Co. Ltd. School of Materials Science and Engineering Jilin University

Under the spirit of sustainable development, ‘lightweight’ has been gradually included into the vehicle design criterion by many manufacturers and used in automobile production. Following this trend, domestic wheel suppliers also begin to study the technology of lightweight wheel. One way to achieve this goal is improving strength grade of the steel and optimizing the structure design in the field of steel wheels. But there are a few problems in flash butt welding process in the application of high strength steel, leading to high rejection rates. SW400 steel is a special high strength wheel steel developed by Benxi Steel. Taking SW400 steel as the research material, this article studys the feasibility of improving the properties of rim flash butt welded joints by adding preheating process.

关键词： preheated flash butt welding heat input characteristics of thermal cycle microstructures mechanical properties

Dry passivation of austenitic SUS 301L stainless steel against pitting co.rosion in marine atmospheric environment

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Journal of Oceanology and Limnology 2022年第4期40卷 1437-1447页

作者： Yonghong LU Xiao LIU Lisha WANG Jinghong YANG Haibo XU Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education co.lege of Chemistry and Chemical Engineering Ocean University of ChinaQingdao 266100China 2 CRRC Changchun Railway Vehicles Co.Ltd.Changchun 130062China

Being an exclusive co.struction material for lightweight rail vehicles,protection from pitting co.rosion in harsh marine atmospheric environment in high humidity and Cl-ion co.centration is critical for austenitic SUS 301L stainless steel(SS),especially when it inevitably suff ers from mechanical damages during post disposals.Herein,an innovative dry passivation method for austenitic SUS 301L SS was established in a closed air atmosphere at low temperature and co.stant pressure.The process parameters were optimized,and the passivation mechanism was explained using polarization curve,electrochemical impedance spectrosco.y(EIS),X-ray photoelectron spectrosco.y(XPS),and co.tact angle measurement.The pitting co.rosion susceptibility of the passive fi lm prepared in a closed air chamber under 1.0×10^(5) Pa at 80℃ for 80 min was evaluated in 3.5%NaCl solution and exhibited higher pitting potential and co.rosion resistance,lower passivity-maintaining current density,and wettability when co.pared with co.ventional nitric acid treatment.Besides,dry passivation facilitated the repairing of the surface structural defect itself and the post-processing damage,similar to the accelerated aging of fi lm.The decrease in oxygen co.centration and co.vection-diff usion strengthened the preferential chromium oxidation to form a co.pact chromium-rich passive fi lm to resist the aggression of Cl-ion.

关键词： austenitic stainless steel passive film dry passivation pitting co.rosion chloride ion

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高速动车组技术发展特点及趋势

Engineering 2020年第3期 67-88页

作者：赵红卫梁建英刘长青 China Academy of railway Sciences co. Ltd. crrc Qingdao Sifang co. Ltd. CRRC Changchun Railway Vehicles Co. Ltd.

1世界高速列车发展历程国际铁路联盟（International Union of railways,UIC）对高速铁路定义为:新线设计速度250 km·h;以上,提速线路速度达到200 km·h;的铁路[1]。我国对高速铁路的定义为:新建设计开行250 km·h;（含预留）及以上动...

1世界高速列车发展历程国际铁路联盟（International Union of railways,UIC）对高速铁路定义为:新线设计速度250 km·h;以上,提速线路速度达到200 km·h;的铁路[1]。我国对高速铁路的定义为:新建设计开行250 km·h;（含预留）及以上动车组列车初期运营速度不小于200 km·h;的客运专线铁路[2]。从世界范围来看,高速铁路及高速动车组发展大致可以分为3个历史时期,分别是初步运营期、线路平台扩展期和快速发展期。

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