A5082039702- Railway Engineering and Dynamics
- Geotechnical Engineering and Underground Structures
- Civil and Geotechnical Engineering Research
- Railway Systems and Energy Efficiency
- Structural Health Monitoring Techniques
- Aerodynamics and Fluid Dynamics Research
- Adhesion, Friction, and Surface Interactions
- Contact Mechanics and Variational Inequalities
- Mechanical stress and fatigue analysis
Central South University
2020-2025
With the rapid development of urban rail transit, intensity and impact range train-induced vibrations are increasing. Investigating transmission characteristics attenuation patterns these in track structures aids understanding environmental vibrations. This study conducted experiments on a long sleeper integrated slab straight section subway tunnel. The hammer struck at various positions, acceleration sensors recorded responses rail, slab, In order to determine force, vertical wheel–rail...
In this paper, a full-scale model of Low Vibration Track was established and three working conditions were applied to single bearing block; these include: vertical load at the end track slab, combination horizontal middle slab. By applying four times static wheel model, relationship between stress structure under different investigated. The corresponding values obtained when slab block reached axial tensile strength concrete. Through test, weak position found, development trend crack...
With the gradual increase of cargo weight heavy-haul trains, traditional ballasted track with accumulation stone and ballast has been unable to meet its structural safety requirements. From comparison three common ballastless tracks in China, it can be seen that low-vibration (LVT) advantages reasonable structure, low cost, easy maintenance. Therefore, design research railways are focused on, is urgent study applicability LVT railways. Method: By improving slope short side support block,...
This paper analyzes the influence of foundation deformation and variation coefficient vehicle parameters on reliability a vertical safety. Based theory stochastic analysis nonlinear vehicle–track coupled systems, combining generalized probability density evolution theory, this takes reduction rate wheel load as measurement index, considering combined effects stochasticity track irregularity, deformation, studies safety under different working conditions. The results showed that (1) compared...
The train sometimes needs to brake frequently on the turnout, although braking force does not exceed limit resistance of fastener, cumulative displacement rail occurs because long-term effect brakes, thus, relationship between and number actions should be explored. Aiming at spring bar type III a 1:1 physical indoor simulation test was carried out, an electromagnetic relay device used simulate load, force, sensors for data collection. Then single load no more than maximum fastener applied...
Abstract Rigid body with initial velocity and no gravity contact the elastomer, this process is too short it can be described by collision. The geometry shape of surface same as contour rigid body. Under excitation velocity, particles produce motion propagate around stress wave. moving energy gradually consumed under action reaction force goes through deceleration stage. During collision process, there a continuous symmetrical pulse at surface. This paper first discusses interfacial...
Abstract Medium damping fasteners have the advantages of low cost, easy maintenance, and convenient in gauge adjustment, etc., which are gradually widely used metro construction. In order to study performance medium a driving environment, we performed measurement on site about vertical lateral displacement rail, as well acceleration rail tunnel wall straight curved cross-section with fasteners. By comparing results ordinary fasteners, it can be seen that: (1) The fastener has vibration...
Abstract In this paper, relying on the National Engineering Laboratory of High-Speed Railway Construction Technology, a full-scale model double-block ballastless track structure is established, and strain analysis layered under different static loads carried out, which has certain practical significance for design maintenance high-speed railway in our country. Research conclusion: (1) Under action load, sleeper directly rail compression; four corners are tensile strain; (2) The at each...