In order to identify the nonlinear aerodynamic forces and calculate nonlinear flutters of a nonlinear dynamic system, an autoencoder model based on the neural network method and numerical solution of motion equation was proposed. The 5∶1 rectangular cross-section was taken as the research object. Th...

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 ...

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...

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 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...

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 obtain location information of onsite construction crew continuously with the consideration of dynamical changing, occluding, and high appearance similarity in construction scenes, a computer vision-based location information perception method for onsite construction crew was proposed. Firstly, a...

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...

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...

To promote the low-carbon transformation of the railway industry in the context of “carbon peaking and carbon neutrality”, a hybrid energy storage capacity configuration method was proposed, with an optimization objective of minimizing the total cost of the traction power supply system. Firstly, by ...

To overcome the labor-intensive and time-consuming limitations of conventional methods for determining soil gravimetric water content (w) and dry density (ρ_d), a rapid determination method integrating frequency domain reflectometry (FDR) and static penetration was developed. Parameter calibration te...

To realize the interconnected power supply for electrified railways, it is essential not only to address the bilateral power supply between two or more traction substations within the railway network but also to solve the impacts of interconnected power supply for railways on power grids. In this pa...

Objective: Railway operators enhance the alignment between transportation services and passenger demand by making quarterly adjustments to the basic train timetable and preparing next-day train operation plans based on it. However, the structural complexity of the basic timetable significantly compl...

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...

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 optimize the dynamic performance parameters of high-speed trains, an iterative design framework for dynamic performance optimization of high-speed trains was established. First, dynamic design parameters were extracted, and a dynamic performance analysis model was constructed. Next, the design sp...

To enhance the precision and effectiveness of vehicle collision reconstructions, equations for calculating collision velocities were formulated based on the conservation of momentum and angular momentum. By using rotational transformations of the collision coordinate system, an analytical model of t...

Given the context of network-level operation conditions of urban rail transit, crew resource sharing is significant for resource allocation optimization, operation cost reduction, and transport efficiency improvement. Firstly, targeted at existing fixed rostering patterns in urban rail transit syste...

To deal with huge computation and low retrieval efficiency in extracting planar open path features by a numerical atlas method, a dimensional synthesis approach was proposed for planar open paths based on chord angle descriptors. Firstly, by using the invariance of translation, rotation, and scaling...

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...

In the context of power supply resource sharing between different lines through interchange stations, optimizing the power supply system design can help reduce active power losses in the network. By considering the constraints of multi-operation scenarios, a novel optimal design method for a power s...

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...

In the application scenarios of unbalanced samples such as airborne lithium-ion battery failure identification, the support vector machine (SVM) algorithm has the problem of hyperplane offset separation. To address this issue, the segmented penalty parameter support vector machine (SPP-SVM) algorith...

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...

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...

In order to improve the seismic performance while maintaining the original style of the slab stone walls of Tibetan and Qiang residential buildings, the construction method of putting restraints on the slab stone walls of Tibetan and Qiang residential buildings by using a reinforcement skeleton syst...

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 characteristics of the seepage-stress field and the safety of the lining structure of small interval tunnels under asymmetric seepage boundary conditions, based on the Liantang Tunnel in Shenzhen, China, a seepage model experiment for the small interval tunnels was developed. In additio...

In order to solve the problem of difficult cutter layout on a W-shaped cutterhead for a shaft boring machine, the influence of cutter installation and arrangement parameters on the rock breaking effect of cutters was studied based on the discrete element method, and the overall layout optimization s...

The mechanical behavior of longitudinally connected ballastless track slabs in the transition section of subgrade and bridge is complex, and arching disease is frequent. The П-type end spine ballastless track in the transition section of subgrade and bridge was taken as the research object, and a tr...

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...

A scientific schedule should be able to meet the needs of most passengers, maintain stable operation, and reduce operating costs. Aiming at the operation characteristics of the flex-route transit different from the traditional fixed-route transit, a method of making the schedule of the feeder flex-r...

A total of 16 concrete-filled high-strength steel tube specimens were designed to evaluate the effects of shear-to-span ratio and concrete strength on the shear behavior of concrete-filled high-strength steel tube specimens. The failure mode and shear-displacement curve of the specimens were obtaine...

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...

To investigate the feasibility of laying seamless turnouts in plateau areas and the influence of plateau climate on the stability of seamless turnouts across areas, the effect of stress-free temperature difference on the force characteristics of seamless turnouts under different climates, elevations...

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...

In order to study the injection law of each nozzle hole of the common rail injector, an injection pattern measuring device for multi-hole injectors was developed based on the momentum method. Under different load conditions, the developed device was used to measure the injection rate of each nozzle ...

Rock strength is a critical parameter for assessing rock stability and safety. Efficient and accurate prediction of rock strength can effectively guide tunnel excavation and support. Digital drilling parameters and mechanical property data of rock were collected from various devices. By analyzing en...

To effectively evaluate the reliability level of the LS-FA-211001 suction anchor during application, the cumulative effect of external loads was considered, and a time-dependent reliability model was established under cyclic loads. The time-dependent reliability analysis of the suction anchor was ca...

In order to evaluate the prediction accuracy of typical stress-dilatancy rules on the mechanical response of common geomaterials, propose a stress-dilatancy rule suitable for rocks, and improve the accuracy of constitutive models, typical stress-dilatancy rules were compared with experimental data t...

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 ...

Objective: The permanent magnet electrodynamic suspension (PMEDS) vehicle, with its integrated levitation and propulsion system, shows significant potential for applications in areas such as ultra-high-speed and heavy-load highways, as well as mountainous road transportation. However, the PMEDS vehi...

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...

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 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 implement continuous descent operation (CDO) in a congested terminal control area and estimate its CO₂ emission reduction benefits, a 4D trajectory prediction method for CDO based on data drive and optimal control theory was proposed. Firstly, the affinity propagation trajectory clusteri...

To study the formation mechanism of inner rail corrugation on the ladder sleeper track in the small-radius curve, a finite element model of the leading wheelset–ladder sleeper track system was developed based on the theory that self-excited frictional vibration triggered by saturated wheel-rail cree...

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 ...

Transformer insulation level and health state are crucial to the safety and stability of the power grid. In order to study the practical engineering problem that the audible acoustic signals collected outside the box may be mixed with other interference signals, such as corona sound and bird song wh...

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...

The 5th generation mobile communication technology (5G) has advantages such as a high connection rate and large system capacity, which can support the development of marshalling station communication systems. However, the 5G antenna parameter planning is challenging due to the large amount of calcul...

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...

In order to reveal the influence laws of the initial curvature of members on the stability bearing capacity of suspended domes, a nonlinear buckling analysis of suspended domes was carried out by applying the multi-beam method to simulate the initial curvature of members and the random imperfection ...

In order to study the damage characteristics of meso and micro pore structures of gypsum rock subjected to freeze-thaw cycles in cold regions, anhydrite rock was taken as the research object, and the porosity, pore size, and pore throat distribution characteristics of anhydrite rock were obtained ba...

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...