Catenary and pantograph are important parts in the power supply system for electrified railways. The dynamic contact between the pantograph and the catenary is pivotal to ensure that the electric locomotives acquire good electricity. Therefore, good dynamic contact between the pantograph and the cat...

According to the cogeneration characteristics of proton exchange membrane fuel cell and electrolyzer, in order to avoid the waste of heat energy in the hydrogen energy system and further improve the system efficiency, a combined heat–power microgrid system for photovoltaic, wind turbines, fuel cells...

In order to reduce the impact of electrified railways on the negative sequence of three-phase power grid, and consider energy-saving and economic operation of traction substations, an energy management strategy and capacity allocation scheme is proposed for the co-phase traction power supply and ene...

Power quality issues represented by voltage unbalance and the electrical sectioning issues have severely restricted the safe and efficient operation of the traction power supply system. At present, the ideal solution is the co-phase power supply technology based on symmetrical compensation theory. B...

Grounding electrode line is an important part of the DC power transmission system, and it is a channel for the unbalanced current and the grounding current in the DC system. When the grounding electrode line is attacked by lightning, the grounding current will form a stable arc in the gap. Since the...

To study the vehicle–cargo matching problem regarding the heterogeneous needs of the vehicle owner, cargo owner and platform under the platform mode, the platform demand is introduced given that the previous studies only consider the interests of both vehicle and cargo parties. Firstly, based on the...

Digital twin (DT) is one of the key technologies to promote digitalization and intelligence in the field of rail transit equipment, but its related research is still in its infancy. Focusing on the research and development status of the life cycle of high-speed trains, it systematically analyze the ...

It is difficult for operators to effectively solve the profitable difficulty caused by the imbalanced distribution of shared vehicles when considering staff-based and customer-based relocation alone. Thus, based on the traditional space-time network, the impact of time-varying road congestion and tr...

To explore the influence of the uncertainties of traffic systems and travelers’ perception differences on route choice behavior, the bi-objective traffic network equilibrium model is proposed by introducing the network reliability and bounded rationality into travelers’ route choice decision process...

In order to investigate the effectiveness of aluminum foam for helicopter crashworthiness design, the mechanical properties of closed cell aluminum foam with two relative densities were tested at quasi-static (0.001 /s) and high strain rates (500 /s, 1000 /s) based on universal testing machine and H...

Aiming at solving problems of distrust in the data interaction between multiple parties and leakage of privacy data, an integrated risk assessment model based on the Cheon-Kim-Kim-Song (CKKS) fully homomorphic encryption scheme is proposed by using homomorphic encryption algorithm in combination wit...

Railway level crossing (RLC) control system is a typical safety-critical system. A novel automatic control system (ACS) that responds to a two-track bi-direction operation is proposed to improve the safety of RLC. Firstly, the operational processes at traditional railway level crossings is analyzed,...

In order to study the evolution law of oxygen and temperature in the process of spontaneous combustion of loose coal, an experimental system for semi-closed coal fire evolution was built to explore the changes of oxygen concentration and temperature in the process of coal from normal temperature to ...

In order to study the effect of the quality of shield tail brush on the working performance of shield tail sealing system, based on dynamic compression test and grease escape test, the influence mechanism of long-term extrusion, wear degree of shield tail brush and mortar penetration on sealing perf...

To study the effect of differential subgrade settlement on the potential damage of ballastless track and the dynamic response of high-speed trains, based on the concrete plastic damage theory, a vehicle-ballastless track-subgrade coupling dynamic model that considers the ballastless track bed damage...

This study investigates the typical rail corrugation phenomenon in the braking section of high-speed railways from the viewpoint that the self-excited vibration of wheel-rail friction induces rail corrugation. The corrugation characteristics of a braking section are first mastered and corresponding ...

Bridge safety during service is greatly influenced by hydro-abrasion caused by waterborne sand. An independently developed testing device was employed to conduct hydro-abrasion tests on a type of anti-abrasion material, i.e., polyvinyl alcohol (PVA) fiber reinforced cement based composites. Ordinary...

PLAOD (precise location and orbit determination) is an undifferenced precise GPS data processing software for positioning and orbit determination fully developed by Southwest Jiaotong University. Currently, the software can process GPS observation data, and has the functions of precise positioning, ...

In order to study the influence of the initial crack configuration (such as the initial crack deflection angle and the space position) in asphalt concrete on the change of crack propagation path and growth mode, A crack model with different initial configurations was established by extended finite e...

To formulate the train load diagram suitable for the high-speed railway with a speed of 400 km/h, based on the principle of uniformly distributed live load effect of German ICE train, Chinese ZGS and the medium-speed train, 0.65UIC load is proposed as the train load diagram of 400 km/h high-speed ra...

The sectional model test in wind tunnels is often used to measure the vortex-induced vibration (VIV) of long-span bridges. Since the sectional model test is based on two-dimensional theory, when the bridge has different aerodynamic configurations along the span due to the partial installation of noi...

In order to study the driver’s sight line under vertical vortex-induced vibration (VVIV) of long span suspension bridges, a numerical framework of coupled wind-vehicle-bridge system considering VVIV (termed as WVB-VIWW) is proposed by introducing a vortex aerodynamic model into the traditional coupl...

The mechanical analysis of shallow noncircular tunnels is of great significance to the construction safety of urban subway tunnels. The difficulty in solving this problem originates from the influence of gravity and the determination of conformal mapping. To this end, a decoupling conformal mapping ...

Soilbags have been successfully applied to the reinforcement of building foundation with obvious effect on seismic isolation, but their deformation characteristics under dynamic load have not been studied in depth yet. In order to further analyze the vertical bearing capacity and deformation charact...

high-speed railway is characterized by fast operation speed and high smoothness, and has certain advantages when used as a platform for train launching. Its vibration acceleration can be used as a critical parameter to assess the structural damage in high-speed railway subgrade. Using the finite ele...

In order to study the effects of various plane forms on the mechanical performance and stiffness degradation of diagrid outer tube structures, the numerical model of a regular octagonal diagrid structure is verified by the hor-izontal pushover test. Diagrid structures with plane forms of quadrilater...

In order to characterize and assess the interfacial bonding strength of steel structure coatings under wind-sand erosion, expressions for calculating interfacial stresses of the steel structure coating under wind-sand erosion are established using theories of contact mechanics and interface mechanic...

Recycled concrete aggregates are used to replace the gravel core material of encased stone columns, forming a new foundation treatment method—recycled concrete aggregate encased column, to improve the problem that the gravel strength cannot be fully exerted when the encased stone column is used to t...