The paper elaborates the important practical and strategic significances of the globalization of China’s high-speed railway on China’s diplomacy, security, politics, economy and culture; and the three key strategic points must be emphasized. Furthermore , the paper analyzes the strategic opportunities and threatens facing to the globalization of China’s high-speed railway. Based on this, the paper put forwards to five strategic principles, including the layout importance, the timing urgency, the path feasibility, the regional difficulty and the railway interconnection. Furthermore, this paper makes following suggestions for the globalization strategy of China’s high-speed railway: integrating strategy implementations, rallying industry forces, constructing the training systems, building national research centers and innovating investment and financing.
The theoretical analysis and key technologies for high-speed railway（HSR） TPSS are needed to be studied. Firstly，a series of key basic theories and technologies of high-speed railway TPSS are described in this paper. Meanwhile，on the present development situation of traction power supply system，the new technologies are prospect such as the new power supply technology，active operation and maintenance，energy saving and improve the efficiency of energy utilization and the detection and monitoring technology. This will provide guidance for the development and application of China high-speed rail traction power supply technology.
The connotation and necessity of testing and commissioning of high-speed railway is explained and discussed， combined with the engineering practice of testing and commissioning in China， the key technology of testing and commissioning of high-speed railway are analyzed from the perspective of wheel/rail interaction， pantograph and ocs relation， aerodynamics of high-speed railway and train-track-bridge coupling. Then the main achievements of testing and commissioning of high-speed railway in China are concluded， and some useful suggestions are given about high-speed railway construction and operation.
The paper summarizes start， growth， accumulation， development，improvement， and leadership of the research on aerodynamics of high-speed rails in China， which focuses on train aerodynamics， vehicle-track-bridge-tunnel coupling aerodynamics， vehicle-wind-sand-rain-snow environmental aerodynamics， pantograph-catenary aerodynamic and body aerodynamics. It is devoted to finding the mechanism of formation， building fundamental theorem， creating technical breakthrough， proposing measures to tackle aero dynamical problems which pose a threat to development of high-speed railways and safety of operation， and realizing their engineering application. The paper introduces a series of experimental platforms for testing aerodynamics of high-speed rails and novel experiments we have accomplished， including moving vehicle model tests， human comfort/vehicle body stiffness/air tightness tests under alternating pressure， aero dynamical experiments in wind/sand/rain/snow coupling environment， vision inspection systems， experimental platform for full-scale vehicles， private/public wind tunnel and high-availability clusters for numerical simulation. Finally it discussed the ongoing research and our thoughts about further development.
According to the structure and technical features of high-speed railway， the high-speed train， rail line， air flow， power supply and catenary which are relevant to the high-speed train and have an effect on the dynamic behavior of the high-speed train are coupled as a unified system. The dynamic model of coupled systems in high-speed trains are created by establishing the dynamic models of high-speed train， rail line， pantograph-catenary and power supply and the coupled interaction models of wheel-rail， pantograph-catenary， liquid-solid and electro-mechanical. For the high speed train operation simulation requirements， this paper studied the train dynamics modeling and calculation method based on cyclic variable parameters method， the train-line coupled calculation method based on the slip model and the liquid-solid coupled calculation method based on the relaxation factor. the simulation of coupled systems in high-speed trains are realized. [Key words] high-speed train； service performance； train detection； tracking test； performance evolution
High-speed railway propose higher requirements on the bogie technology，in order to design a super performance of electric multiple unit （EMU） bogie， investigate the line condition of China passenger dedicated railway，and also investigate the wheel tread wear of EMU，use actual measurement rail profile and worn profile tread analysis the matching relationship of wheel and rail. Dynamics analysis consider nonlinear characteristics of box guidance node，anti-hunting damper，air spring and other parts，and consider the parameters changes at different high and low temperature variations，also consider motor elastic suspension mode，basic on above factor，build vehicle dynamics model with actual wheel rail matching relationship，through system simulation optimal selection of suspension parameters，combined with the test stand construction design. In order to grasp the key parts of bogie service period reliability，take a great deal dynamic stress test，use the test data analysis maintenance vehicle operating cycle，different climatic conditions，different line conditions on the ballastless track of China，setup China high-speed train load spectrum. Through system integration of the structure design，suspension，transmission，brake，wheel rail noise，structure welding and so on，the high-speed train bogie technology system was founded.
This article comprehensively summarize the optimization of process innovation of the new generation of high-speed electric multiple unit（EMU）， minutely analysize its innovative design on aerodynamic optimization， air tightness， modal matching， reduction vibration and noise， lightweight and other aspects. The simulation and experiment result shows that the new generation of high-speed EMU is with enough strength， stiffness， structure stability， excellent features of vibration and fatigue，great performance aerodynamics and noise.
With the rapid development of high-speed railway，a large number of high-speed train operation brings a series of problems of energy consumption and environmental protection etc. This paper describes the system energy consumption of high-speed train composition，proportion and the influence factors，further expounded the key technology of high-speed train energy consumption. It explicitly introduces the key technologies of energy saving and consumption reducing and also discusses in details the effects of the energy saving from the low resistance technology，high energy efficiency traction technology and recycling and management of energy recovery. The application of these technologies will strongly promote the development of high-speed trains and continue to improve high-speed train’s high energy efficiency level. [Key words] high-speed train；saving energy and reducing consumption；high energy efficiency
Due to the space-time span， there always is variation on the vibration and climate， which makes the se
Nowadays， various track structures have been applied in Chinese high-speed railway， which obviously causes the adaptability problems for electric multiple unit (EMU) running on the tracks. It is significant to carry out the investigation of track adaptability. Therefore， based on the theory of vehicle-track coupled dynamics， the method of adaptability design for high-speed EMU running on the tracks is preliminarily discussed in this paper. By regarding the high-speed EMU as the design object， a method of track adaptability design is presented， which can supply a new idea and reference for Chinese high-speed EMU. Lastly， the application of this method is introduced in the dynamic performance design of Chinese standard EMU.
Based on the study on key technical problems and prospect of a new generation of China high-speed trains (electric multiple unit， EMU)， the development trend and strategies are discussed in detail. The main contents include： firstly， the advanced design technology and concept of international advanced rail vehicle manufacturers used in the new generation vehicles developing process were introduced. And their respective characteristics of the core technology and its possible future technology development trend were hierarchically studied. Secondly， based on the study of domestic and foreign literatures， combined with the Chinese high-speed rail vehicle development of its own characteristics and the actual situation， some suggestions and specific analysis， which included the traction drive technology， bogie， carbody design technology and other key technical problems were put forward here. Finally， based on the development of a comprehensive consideration of rail vehicle styling trends and design principles， according to the design method of integrated design theory and multidisciplinary optimization， some specific suggestions and strategy of development for major technical challenges in the new generation of Chinese high-speed rail EMU were put forward. In conclusion， through the study of the paper， some useful suggestions were put forward for the future development of high-speed train in China.