To cater to passenger travel, a rational transit operation schedule formulated should maintain stable operation and reduce operating costs. Firstly, aimed at the operation characteristics of flex-route transit different from traditional fixed-route transit, a strategy for the transformation of the t...

To investigate the long-term deterioration characteristics of tunnel support structures under creep effect, mechanical models of anchor bolt fracture, steel arch frame yielding, and concrete plastic damage were established for the tunnel support structure system. Numerical examples were used to veri...

To meet the demand for rapid repair of building structures after earthquakes, a short-leg shear wall with high-strength steel bars (HG bars) as longitudinal reinforcement of the concealed column, namely short-leg shear wall with high-strength steel bars was proposed. Three prefabricated 1/3-scale re...

To reveal the performance transformation characteristics of asphalt mixtures under high temperature and propose corresponding indices for high temperature performance evaluation, the dynamic modulus and phase angle of three fine-grained asphalt mixtures used in RIOHTrack full-scale track were tested...

The cyclic dynamic stress generated during train operation presents a significant challenge to the dynamic strength of subgrade fill materials. Existing research has mostly simulated train loads using continuous loading methods, which fails to fully reflect the intermittency of these loads. To inves...

To improve the accuracy of fault diagnosis for suspended electromagnet coils under complex operating conditions, a fault diagnosis method for electromagnet coils based on the increment of current change rate within a cycle was proposed based on the changes in current characteristics before and after...

To further enhance the control performance of the guidance system for high-speed maglev trains, the guidance system was taken as the research subject, and the design and simulation of a guidance controller were carried out based on the mathematical model of a jointed guidance system. The behavior of...

To address levitation and guidance performance deficiencies in permanent magnet maglev “Red Rail” train bogies, an innovative bogie scheme was proposed, and dynamic analyses were performed. First, the finite element method was used to analyze the Halbach array’s magnetic field and force characterist...

To clarify the relationship between rockfall impact force and impact load in civil engineering, a comprehensive reflection coefficient is introduced to reflect the interaction between falling rocks, cushioning soil layers, and structures (a higher value indicates a more significant impact effect on ...

Most existing fault diagnosis studies for electromagnetic vibration damping systems rely on mechanical signals such as displacement or acceleration signals, while relatively few studies focus on the changes in internal magnetic field signals. Magnetic field signals detected by the Hall sensor were u...

A remanence compensation method for permanent magnet arrays was proposed to enhance the control performance of maglev planar motors after demagnetization faults, and the effectiveness of the proposed method was verified by a digital twin model. Firstly, a digital twin framework for maglev planar mot...

Geological disasters occur frequently in China, among which landslide disasters, due to their multiple types, difficult detection, wide distribution, great harm, and other characteristics, result in casualties and property losses and are ranked as the first of all types of geological disasters. Mult...

For environments with high space utilization rate requirements such as high-speed motors and flywheel energy storage systems, a novel heteropolar radial hybrid magnetic bearing (HRHMB) was proposed. Firstly, the equivalent magnetic circuit model of the new magnetic bearing was established, and the c...

To enhance the fault tolerance capability of the levitation system of a medium- and low-speed maglev train, a reliability analysis was conducted using failure mode, effects, and criticality analysis (FMECA), identifying typical failure modes. A fuzzy comprehensive evaluation based on expert judgment...

To address the high-power permanent-magnet direct-drive bogie-suspended traction systems, the impact of suspension parameters of the wheelset drive system on the re-adhesion performance of locomotives was investigated. Based on the average slip rate and dynamic slip rate, the mechanism of locomotive...

High-speed electromagnetic suspension (EMS) maglev turnouts are one of the weak links in maglev transit, and the study of their alignment parameters is essential for optimizing turnout design. To explore the impacts of the horizontal curve alignment and parameters on the turnout design, the geometri...

To simplify the steel shell–concrete composite pylon structure and improve construction efficiency, a novel ribbed straight-hooked rebar (RSHR) shear connector was studied. Firstly, the push-out and pull-out tests of the shear connector were designed. The shear bearing capacity, pull-out bearing cap...

To investigate the impact of turbulent atmospheric delay on high-precision and fine-scale deformation extraction using time-series InSAR (Interferometric Synthetic Aperture Radar), the turbulent atmospheric delay was considered as a gross error in the time series, based on its random characteristics...

To enhance the position tracking accuracy of the linear magnetic drive system susceptible to uncertainties such as external perturbations and address the jitter in sliding mode control, a super-twisting sliding mode control strategy was proposed based on the fuzzy variable gain. First, the working p...

When the dynamic detection of permanent magnet guideway (PMG) irregularity is conduced, eliminating the vibration components generated by the vibration of the measured carrier in the measured signal is conducive to grasping a more accurate real-time state of the guideway. The self-adaptive noise can...

To consistently describe the mechanical response of sand and clay under generalized stress paths, a unified critical state constitutive model (CASM-SG) applicable to generalized loading conditions was proposed based on the unified constitutive clay and sand model (CASM) with state parameters and by ...

High-speed and heavy-load applications are an important trend for magnetic bearings (MBs). To address issues such as low load capacity and disconnection between electromagnetic design and controller in traditional MBs, increasing the working magnetic flux density of the MBs to approach the material’...

Self-sensing concrete materials for health monitoring have emerged as a new research focus in the field of structural engineering, yet there are challenges in the progress of their application and industrialization. To promote the application of self-sensing concrete in structural health monitoring,...

To improve the utilization capacity and transportation efficiency of the railway network, a highly applicable method for optimizing freight train formation plans was proposed. First, under the condition of unknown car flow routing, the stochastic nature of both accumulation time and shunting time wa...

Magnetic drive oil-free scroll compressor (MDOFSC) adopts electromagnetic force to drive the orbiting scroll in a non-contact manner. The problems of strong nonlinearity in the compressor system and large trajectory tracking errors under proportional integral differential (PID) control were analyzed...

To solve the vehicle-girder coupled self-excited vibration problem of the maglev transit, and to provide a reference for girder design, the influences of the parameters of the girder on the stability of the vehicle-girder coupled system is investigated based on the mathematical model established tho...

To improve the dynamic stability of the permanent magnet (PM) electrodynamic suspension (EDS) and reduce the drag during low-speed operation, a bilateral PM and electromagnetic hybrid EDS system was proposed. Firstly, a 2D analytical expression of the system electromagnetic force was derived based o...

To investigate the influence of curves and train conditions on the vibration response of floating slab tracks, portable intelligent sensing terminals were installed on floating slabs at multiple locations, including both straight sections and curves. The vibration acceleration of the floating slabs ...

Rapidly obtaining co-seismic landslide distribution and conducting disaster assessments after earthquakes are vital for effective emergency relief and reconstruction. Therefore, in this study, the InSAR data-Newmark physical fusion driver model (IDNPM) was used to rapidly assess the landslides trigg...

To investigate the friction and sliding performance of laminated-rubber bearings under aging conditions, heat aging tests and quasi-static tests were conducted based on the related provisions of shear aging resistance in the bearing specification. Firstly, the actual working state of the bearing in ...

In order to improve the performance of superconducting electrodynamic suspension system, an optimal design method of asymmetric null-flux coils was proposed based on global sensitivity analysis and multi-objective optimization algorithm. Firstly, the mathematical model of superconducting electrodyna...

To accurately and efficiently evaluate the vibration damping performance of tracks, the German standard DIN V 45673-4 provides a method for efficiently calculating the insertion loss rate, which can eliminate interference from stochastic factors such as line operation conditions and track irregulari...

To reveal the mechanical properties of glacial tills in the Purang region of Xizang, in-situ direct shear tests with normal pressures from 100 kPa to 400 kPa were carried out on surface glacial tills in a natural state, and laboratory large-scale direct shear tests with normal pressures from 100 kPa...

To address the problem of uneven transverse compressive stress distribution in traditional carbon fiber reinforced polymer (CFRP) plate anchors, which makes the plate prone to tearing failure during the tensioning process, a new clamping anchor for CFRP plates was developed. The new anchor features ...

The impact of uncertain parameters on the dynamic response of the high-speed maglev train levitation system was investigated, aiming to provide a theoretical foundation for the optimal design of maglev trains. Firstly, the high-speed maglev train levitation system was simplified to a single-point le...

As chips continuously enter and leave from the tool flute during the cutting process of the motorized spindle for magnetic suspension milling, the size and distribution of the system mass are constantly changing, leading to the nonlinear change of system dynamics characteristics. To address these is...

Unfavorable water-rich and fractured geological zones easily bring about water inrush disasters during tunnel construction. To accurately analyze water-rich and fractured risks in tunnel surrounding rock and address the need for automated and quantitative risk analysis, a fuzzy Bayesian network mode...

The design speed of the superconducting maglev train reaches 600 km/h, causing intensified flow around the vehicle body and a sharp rise in aerodynamic loads. To study the train’s levitation state under aerodynamic loads, the finite element method was used, and the SST k-ω turbulence model was adopt...

To study the fatigue damage inflicted on hangers by high-speed trains passing over a concrete-filled steel-tube tied-arch bridge, field dynamic load tests were conducted against the backdrop of the Qinjiang Bridge in Qinzhou, Guangxi Province. These tests measured the bridge’s modal parameters, disp...

As one of the important contents of health monitoring of concrete structure, crack detection reflects the stress and damage state of the structure, and the detection and evaluation is the core technology to ensure structure safety for service. The traditional detection methods have limited coverage ...

At present, the transportation organization and management within the tunnel still remain at the macro level, lacking refined decision-making on construction vehicle timetables and operation paths. To address the above issues, this article draws the internal traffic network topology map of the long ...

To reduce the number of sensor nodes deployed in rolling terrains, firstly, the digital elevation model and Delaunay triangulation were used to model the rolling terrain surface and determine the solution space of the node deployment problem. Secondly, the functional relationship between the node de...

Compared with traditional wheel-rail transportation, maglev trains have some irreplaceable advantages such as high speed, low noise, smooth operation, and low maintenance cost. To realize precise speed control of maglev trains in complex disturbance environments, an active disturbance rejection cont...

In order to study the influence of high-frequency signal injection (HFSI) response to electrical angle phase shift on the low-speed control accuracy of maglev trains, the constraint relationship between the control delay and the sampling delay on the angular error lag was considered, and a compensat...

To address the limitations of using an advance guide tunnel for controlling large deformations of surrounding rock in soft rock tunnels, a deformation control method of “advance stress release + circumferential (lagging) grouting + lengthened anchor rod” was proposed after a thorough analysis of the...

The actual flexural bearing capacity of prestressed concrete pipe piles with hybrid reinforcement (PRC pipe piles) is different from the theoretical design value due to the influence of prestressed control level and hybrid reinforcement, which leads to the potential risk of pile body damage or perfo...

In order to study the seismic fragility of subway stations situated in loess sites, a typical two-story three-span subway station structure in a loess area was chosen as a representative example, and incremental dynamic analysis (IDA) was conducted on the subway station structure by using the ground...

To optimize the deterioration assessment and maintenance of ballasted tracks, it is of great value to study the breakage process and mechanism of ballast particles. Through a uniaxial breakage test on the single ballast particle, the equivalent stress required for its failure was determined. The def...

To evaluate the design rationality and operation reliability of the magnetically suspended fluid machinery, the API617 standard was applied to analyze its vibration and stability. Firstly, the relevant specifications and requirements for magnetically suspended fluid machinery in the API617 standard ...

To study the mechanical constitutive model of steel bridge coating, uniaxial tensile tests were carried out on the long-lasting coating system, obtaining the stress–strain curves for the topcoat, intermediate coat, primer, and composite coating. The unified expression for the constitutive equation o...

The soil–phyllite mixtures are widely distributed in the northwest of Sichuan, and excavation of slopes in these areas under rainfall conditions can cause large-scale instability, posing threats to the safety of transportation engineering construction and operation. The permeability characteristics ...

To investigate the effect of high temperature on the deterioration of the physical and mechanical properties of sandstone, uniaxial compression tests were conducted on thermally-treated sandstone subjected to different temperatures. Firstly, the deterioration characteristics of macroscopic mechanica...

External pressure plays a crucial role in the performance of lithium metal batteries. In order to study the macroscopic performance and the microscopic lithium deposition characteristics of lithium metal batteries under different pressure conditions, the pressure test and scanning electron microscop...

To optimize the T-shaped retrofitting scheme of diagonal members, the influence of structural and material parameters on the bearing capacity of the members after retrofitting was investigated through theoretical analysis, experimental study, and finite element analysis. Firstly, a theoretical model...

In order to achieve the safe application of red mud-based cementitious materials in road engineering, the mechanical properties and quality of red mud-based stabilized crushed stone base under freeze-thaw cycles were studied. The influence of freeze-thaw cycle temperature and number on mechanical pr...

Vertical stiffness is critically significant for the operational safety and ride comfort of high-speed electromagnetic suspension (EMS) trains on bridges, constituting one of the essential design parameters in bridge engineering. By using a three-span continuous girder as the study object, the verti...

The existing detection methods for the insulation of cable terminals of electric multiple units (EMUs) are complex and susceptible to onsite noise interference, and they thus have low detection efficiency. Therefore, a novel method for detecting the insulation condition of cable terminals based on e...

To accurately assess the overall safety of transmission towers with asymmetrical legs, a refined numerical model for a transmission tower with asymmetrical legs was established based on a 500 kV transmission line project. Based on the Technical Specification for the Design of Steel Supporting Struct...

To achieve high-quality coordinated development of roadbed and environment in mountainous railways, a coupling optimization and regulation method of roadbed and environment was proposed. Firstly, the compatibility and symbiosis between the railway roadbed and the environment were defined, and a gree...

To study the heat–mass transfer patterns and structural damage mechanisms of sulfate saline soil under freeze–thaw cycles, a freeze–thaw cycle test was carried out under non-pressurized supply condition with saline soil from Hexi Corridor as the research object. The pore structure damage mechanism o...

Efficient geographic and geological knowledge services for railway engineering form a crucial foundation for supporting the multi-scale and multi-disciplinary intelligent applications of digital twin technology in railways. To improve the completeness of query results and enhance the capability for ...

In order to study the variation law of water film thickness of multi-lane drainage asphalt pavement under ultimate rainfall intensity, a full-scale experimental section of multi-lane drainage asphalt pavement was constructed in the laboratory based on the seepage characteristics of drainage asphalt ...

To address the irregular noise distribution and the high difficulty of semantic segmentation in railway yard catenary point clouds, and to enhance the detection of catenary anomalies. First, the railway yard catenary scene data is analyzed, and a knowledge framework is constructed for extracting cat...

In order to solve problems of slow system response speed and poor anti-interference ability in the position control of the rotor of active magnetic bearings (AMBs), a position control method combining the non-singular fast terminal sliding function with the improved super-twisting reaching law was p...

To analyze the wind-resistance working mechanism of stretched ribs mounted on high-rise buildings, the impact of horizontal ribs on the flow field and wind load of high-rise buildings under atmospheric boundary layer flow was evaluated by using the large eddy simulation (LES), and the wind-resistanc...

To explore the water-stop performance of a large-scale high-pier aqueduct under earthquakes, a finite element model of the aqueduct was established based on the fluid-solid coupling method, and the nonlinear coupling behavior of the aqueduct and water under dynamic effects was simulated. By introduc...

To investigate the trackbed bearing capacity and lateral resistance characteristics of a new X-shaped sleeper, scaled tests comparing the stiffness and lateral resistance between X-shaped and Type Ⅲ sleepers were conducted. A 3D model of a ballast track was established by the discrete element method...

The brake disc of electric multiple units (EMUs) will form complex residual stress during long-term service, which will lead to irreversible warping deformation after disassembly. In order to investigate the influence of residual stress and warping deformation on the feasibility of subsequent mainte...

To study the reason for the abnormal fracture of e-type clips on small-radius curved subway tracks, the development of rail corrugation on Line X of the Chengdu Metro over an extended period was monitored and measured. Based on the theory of friction-induced self-excited vibration, a comprehensive s...

To study the influence of automotive acoustic package design parameters on its multi-performance objectives, firstly, the traditional DBNs (deep belief networks) method was modified, and the SVR-DBNs (support vector regression-deep belief networks) model was proposed to improve the accuracy of model...

With the increase in sinusoidal disturbance frequency, the performance of extended state observers (ESOs) will decrease. In order to improve the disturbance suppression ability of the ESO in the maglev rotor system, firstly, the mathematical model of a one-degree-of-freedom (1-DOF) maglev bearing ro...