In order to study the influence of the temperature-dependent material property on the wheel–rail contact behavior and frictional temperature rise, a three-dimensional wheel–rail thermal-mechanical coupling model considering the temperature-dependent material property was proposed in this paper, whic...

The stiffness of the rubber pad of the WJ-8 fastener exhibits nonlinear characteristics during long-term service, and the static stiffness decreases with the increase in the load. In order to improve the calculation accuracy of the three-dimensional transient rolling contact finite element model, th...

In order to study the maintenance mechanism of ballast tamping and stone-blowing from a micro view, a ballast box numerical model using the discrete element method was established, and the whole processes of ballast tamping and stone-blowing were visually simulated by coupling the tamping hammer mod...

According to irregular changes in rail profiles in a fixed-nose crossing, a parametric design method was proposed based on the B-spline theory by considering the section characteristics of rail profiles in a fixed-nose crossing. In addition, the rail profile fitting evaluation indexes and the influe...

In order to study the internal forces and the damage of broad-narrow joint under a temperature rise, a detailed finite element model with the interface between old and new concrete is established on the basis of concrete damaged plasticity model and cohesive zone model. The damage parameters and str...

The freeze-thaw damage evolution of asphalt concrete for waterproofing layer in high-speed railways (shorted as railway asphalt concrete) was investigated. Four kinds of composite polymerized railway asphalt concrete were prepared with different asphalt binders and aggregate gradations, and the dete...

To study the distribution law of welding residual stress of corrugated steel web girders, a three-dimensional thermo-elastoplastic model was established by finite element software, and the welding temperature field and stress field were numerically simulated by the finite element method using therma...

The current analysis method for the main cable shape of a suspension bridge with a spatial cable plane involves solving complex differential equations for the main cable. However, this approach has certain drawbacks, such as the complicated form of constraint equations and the significant influence ...

To explore the repair mechanism and effect of pneumatic impact treatment on fatigue cracks of the steel bridge deck, the plastic deformation of the target material during the pneumatic impact treatment was studied based on kinetic theory, and the behaviors of crack surface closure under such plastic...

The dominant factor impacting the dynamic performance of a train under a crosswind changes from wheel-rail interactions to the aerodynamic force, making the crosswind overturning risk the main threat to safe train operation. This study first analyzes the train overturning stability using a refined c...

In order to study the influence of the scouring effect on the dynamic response of long-span bridges under the combined action of earthquake and wind, based on the established coupled vibration analysis model of earthquake-wind-vehicle-bridge, the p-y curve ( p is the soil resistance and y is the pil...

In order to study the damage evolution law of damaged reinforced concrete (RC) structures repaired with carbon fiber reinforced plastics (CFRP) under earthquake action and accurately quantify the damage status of repaired structures, a quasi-static test of 10 circular RC piers was carried out, eight...

In order to quickly and economically select the vortex-induced vibration (VIV) aerodynamic suppression measures of the open-type bluff-body bridge section, a cable-stayed bridge of the composite girder with side beam was taken as the background, and the “CFD numerical simulation selection + wind tun...

A feature point and line hierarchical matching method is proposed, suitable for oblique images to solve the challenges of large angle in view transformation, a few matches due to repeated texture, and low matching accuracy. Firstly, the line features of images derive from the line extraction (detect...

Ensuring the long-term stability of the pile foundation in ice-rich frozen soil areas is the key to the safe use of bridge pile foundations in permafrost areas. In order to analyze the influence of ice content on the creep characteristics of the frozen sand-concrete interface, the creep tests of the...

To investigate the mechanical properties and failure characteristics of granite intersected with single fractures, uniaxial compression tests were carried out on intact granite and granite intersected with fractures at inclined angles of 30°, 45°, and 60°, which were selected from the Beishan area f...

With the rapid development of transport infrastructure, the dynamic properties of soil under long-term cyclic loading and the corresponding constitutive model system are receiving increased attention, which can provide a theoretical basis and technical support for the assessment of the dynamic stabi...

In order to explore the influence of section parameters and joint forms on the seismic performance of the straight-tenon joints with a bolt pin, four full-scale joint specimens were designed and fabricated, with beam height and beam width as the research parameters. In addition, they were compared w...

In order to reduce the deflection amplitude of the continuous rigid frame bridge span, an optimized control method of mix proportion based on the dense packing theory of aggregates was proposed for the two influencing factors of elastic modulus and creep. In addition, the original mix proportion was...

In order to study the dynamic response characteristics of the pulse wind tunnel balance foundation under the action of pulse aerodynamic loads, a pulse wind tunnel was taken as an example, and a typical aerodynamic load action type was selected. As a result, a simplified calculation method for dynam...

In order to analyze the cascading failure of the transmission tower–line system under strong wind, this paper took the collapsed transmission tower as the weak tower and used equivalent displacement to consider the influence of weak tower collapse on the spatial location of suspension points. The re...

To solve the problem that the scale factor error and installation error of odometers have a great influence on the accuracy of strapdown inertial navigation/odometer integrated navigation, a fast calibration method based on short-term SINS (strapdown inertial navigation system) information is propos...

To mitigate the impact of large-scale integration of distributed generation (DG) on the secure and stable operation of distribution networks, we propose an active distribution network optimal reconfiguration method that considers the uncertainty of distributed power generation output, based on non-c...

Following the guideline of the reasonable planning and sustainable development of photovoltaic (PV) power plants, an emergy analysis based method is proposed for the site selection and eco-economic benefit assessment of PV power plants. Through the combination of emergy analysis and geographic infor...

The decomposition of top-level design indicators is the primary link to determine the cycle length and success of forward design for high-speed trains. First, on the basis of expounding on the top-level design indicators of high-speed trains in terms of transportation capacity, safety and comfort, e...

In view of engine knock, a technical solution was proposed to achieve a natural gas engine with a high exhaust gas recirculation (EGR) rate by utilizing a zero-power consumption ejector. Firstly, the structural parameters of the ejector were designed and calculated under specified operating conditio...

Inspired by the fact that a human torso has both rigid skeletons and flexible internal organs, a passive walking robot model with a rigid and flexible bionic torso was proposed to improve the gait property of the robot, and the nonlinear dynamic properties of the robot were studied. First, the dynam...