Traffic flow stability analysis is the basis for studying the formation mechanism of congestion and platoon control. Linear string stability analysis on mixed traffic flow in connected automated vehicle environment has become a research hotspot in recent years. According to the size and scope of the...

In order to solve the constraint difficulty in the railway traffic distribution and route optimization model, and the inadequacy of swarm intelligence algorithm, a constraint optimization method based on penalty function is proposed. First, a virtual arc is set on the basis of the basic model of tra...

To make up the deficiency of existing indexes, resilience is introduced as the operation stability index for CTCS-3 (China train control system-3) on-board subsystem under abnormal events. The quantitative evaluation method of on-board subsystem resilience is proposed, the resilience evaluation mode...

As manual compilation on the maintenance plan of catenary systems is low efficient and hard to optimize, it is converted into a plan optimization problem. An automatic compilation model of catenary maintenance plans is established on the basis of elastic period interval. It uses the integer programm...

Load process simulation analysis based on the paving operation diagram for urban rail power supply system is significantly different from the actual load process, which cannot accurately reveal many issues in the operation stage of the power supply system. To improve the accuracy of the simulation m...

The thermal dissipation of traction transformers is involved in the conjugate heat transfer between the cooling oil and windings along with the secondary heat release of the heated oil delivered to an oil cooler. To simulate the temporal and spatial temperature variations of traction transformers ac...

In order to solve the problem that replay attacks in the differential privacy protection mechanism will leak user privacy, a skyline query method based on dynamic page sensitivity adjustment is proposed. First, in order to improve the efficiency of page sensitivity calculation, a method for calculat...

In order to investigate reasonable rail gauge and rail cant of No.18 turnout with 60N rail under the straight passing speed 350 km/h, based on the track line method and Kalker’s 3D non-Herz rolling contact theory, key sections of 60N rail turnout and measured LMA worn wheels were used to analyzed th...

In order to explore the design method of the combined stiffness under the baseplate of the elastic indirect fastener system, improve the error and accuracy in the design of the traditional model, based on nonlinear elastic foundation beam, a theoretical calculation model of composite stiffness under...

In order to accurately solve the relative displacements of heavy haul freight suspension on a curved track, firstly the mathematical model of curved track was established, and the formulas of outer rail superelevation, slope angle, roll angle and central angle with the length of curve were derived, ...

Rail corrugation not only reduces the ride comfort of passengers, but also increases damages of tracks and vehicles, and even affects the safe operation of trains. In order to verify the correctness of rail corrugation prediction models, firstly the occurrence probability of rail corrugation was cal...

In order to study the effect of high temperature creep on thread load, uniaxial tensile creep tests were conducted on aluminum alloy specimens at normal temperature, 250 ℃, 300 ℃, and 350 ℃. The time-hardening creep model parameters of the aluminum alloy at different temperatures were obtained by fi...

To study the influence of vehicles on vibration characteristics of large displacement expansion joints, a vertical dynamic model of heavy vehicle-expansion joint coupled system is established, considering the real load characteristics of a wheeled heavy vehicle when passing a large displacement brid...

In order to improve the calculation accuracy of the natural frequency of thin-walled box beams, the dynamic characteristics of thin-walled box beams are analyzed using the generalized coordinate principle. Firstly, the free vibration differential equations of five highly coupled modes (i.e., extensi...

To explore chloride ion erosion in the crack propagation process of concrete structures under loads, and more accurately describe the characteristics of chloride ion erosion around cracks at different stages, the development process of concrete trabeculae type Ⅰ fracture, based on the concrete fract...

The self-healing performance of cement mortar specimens at different ages and temperatures was tested by compressive strength repair rate, crack repair rate, and electrochemical impedance spectroscopy (EIS), and then was analyzed using the scanning electronic microscope (SEM) to study the microscopi...

In order to explore the influence of constitutive models on the surface settlement induced by shallow tunnel excavation, the surface settlement trough induced by shallow tunnel excavation in composite layered strata was analyzed considering the friction and critical state soil constitutive model. Fi...

Corroded rock mass usually plays a key role in controlling the stability of rock mass engineering. In order to reveal the evolution law of anisotropic mechanical properties and failure characteristics of the bedded rock mass suffering corrosions, indoor uniaxial compression tests were carried out on...

A highway tunnel under construction in Honghe Prefecture, Yunnan Province was taken as the research object to study the geological genesis of high ground temperature. The tunnel has both high water temperature and high rock temperature, with the maximum water temperature of 63.4 ℃ and the maximum ro...

Discrete element analysis method is one of the important tools for studying rock mechanics behavior and refining the basic theory of rock mechanics. In order to improve the accuracy of the particle discrete element method to simulate indoor rock mechanics and large-scale engineering scale tests, a l...

As there is a lack of automatic search method for trestle positions of freight cableways, three methods, namely convex-point traversal method, terrain adaption method, and interference-point search method, are proposed, all of which can search trestle positions automatically on two-dimensional terra...

In order to find out the long-term effects of train load on the composite stratum of clay and silt and the metro tunnel in it, the dynamic response characteristics of this kind of composite stratum under a metro tunnel in a typical section of Wuxi Metro lines due to the moving train were firstly stu...

To meet the new requirements of bridge piers for rapid repair after earthquake and improve the suitability of precast segmental bridge piers in medium and high intensity areas, a precast segmental concrete filled steel tube (CFST) bridge pier with external replaceable energy dissipation devices was ...

To accurately investigate the distortional effect of single box double-cell box girders (SBDBG) under vertical eccentric load, the concepts of antisymmetrical and positive-symmetrical distortion were introduced, and the distortional assumption of rectangular cross section of SBDBG was supplemented. ...

A cable opening inspection was made on a suspension bridge in service for 25 years in Myanmar to analyze the corrosion status and residual bearing capacity of the main cables. First, the outer protection layer of the main cable was removed; the main cable is partially split with wedge for detection,...

To analyze the restrained torsion effect of the box girder with corrugated steel webs (CSWs) more reasonably, the calculation formulas of warping normal stress and shear stress were deduced considering the accordion effect of CSWs. Moreover, the governing differential equation for analyzing the rest...

In order to solve the problem that traditional geophysical methods are difficult to achieve better detection and monitoring of stratum disturbance in urban shield tunnel engineering, the application of active source Rayleigh surface wave elliptical polarization method is proposed. Firstly, the 2D fi...