scholarly journals Statics performance of heavy-haul railway low-vibration track (LVT) under varying loading condition with the finite element method

2021 ◽  
Vol 104 (4) ◽  
pp. 003685042110363
Author(s):  
Zhiping Zeng ◽  
Guanghui Hu ◽  
Xiangdong Huang ◽  
Weidong Wang ◽  
Ayoub Abdullah Senan Qahtan ◽  
...  
Keyword(s):  
Finite Element ◽  
Loading Condition ◽  
Structure Design ◽  
Railway Track ◽  
Track Structure ◽  
Vertical Load ◽  
Lateral Direction ◽  
Finite Element Software ◽  
Heavy Haul ◽  
Heavy Haul Railway

Low-Vibration Tracks (LVTs) are widely used in subway tunnels for their excellent performance, but the application in heavy-duty railways still requires a lot of feasibility studies. In this study, the statics performance of LVT under different axle loads, load direction, and load position is explored using the finite element software Abaqus. The Timoshenk beam element and nonlinear spring element 3D solid element are used to represent rails, fasteners, and the other track structure respectively. The paper established the finite element model of LVT to study the mechanical characteristics of low vibration track structure under varying loading condition. The applied loads are determined according to the Heavy-Haul Railway Track Structure Design Code. The results shows: (1) The deformation and stress of the LVT structure show a linear relationship with the increase of the axle load. (2) Slab end loading and lateral load are more unfavorable to the stress and deformation of the track structure. When slab end is loaded with vertical load, the vertical load is distributed on four supporting blocks along the longitudinal direction with a ratio of 1:4:4:1, and the lateral direction is mainly borne by two adjacent fastener nodes with the total load proportion of 47% and 47% respectively. (3) The LVT structure can guarantee the safety of static performance under 30 t axle load and the maximum axle load should not exceed 36 t. The paper provides a guideline for the construction and maintenance of LVT structure in heavy haul railway.

scholarly journals EXPERIMENTAL INVESTIGATION ON DYNAMIC BEHAVIOUR OF HEAVY-HAUL RAILWAY TRACK INDUCED BY HEAVY AXLE LOAD

Transport ◽  
2019 ◽  
Vol 34 (3) ◽  
pp. 351-362 ◽  
Author(s):  
Zhiyong Shi ◽  
Kaiyun Wang ◽  
Dawei Zhang ◽  
Zaigang Chen ◽  
Guanghao Zhai ◽  
...  
Keyword(s):  
Dynamic Behaviour ◽  
Experimental Tests ◽  
Railway Track ◽  
Track Structure ◽  
Dynamic Force ◽  
Speed Range ◽  
Heavy Haul ◽  
Load Effects ◽  
Heavy Haul Railway ◽  
Made In

The damage to the track structure and the influence to the line deformation have greatly deteriorated with the increase of the axle load compared with that of the ordinary trains. However, there is a paucity of experimental research on the dynamic influence of the heavier haul freight trains on the railway tracks. The objective of this study is to investigate the dynamic behaviour of heavy-haul railway track induced by heavy axle load by field experimental tests. The wheel–rail dynamic force, the track structure dynamic deformation and the track vibration behaviour are measured and analysed when the train operates in the speed range from 10 to 75 km/h and the axle load of vehicles varies from 21 to 30 t. Comparisons between the results for the axle conditions of 25 and 30 t are made in this paper to reveal the axle load effects. It is demonstrated that part of the indicators reflecting the dynamic behaviour of the railway track increases approximately linearly with the train running speed and axle load, while others are influenced negligibly

scholarly journals WHEEL–RAIL WEAR INVESTIGATION ON A HEAVY HAUL BALLOON LOOP TRACK THROUGH SIMULATIONS OF SLOW SPEED WAGON DYNAMICS

Transport ◽  
2018 ◽  
Vol 33 (3) ◽  
pp. 843-852 ◽  
Author(s):  
Yan Quan SUN ◽  
Maksym SPIRYAGIN ◽  
Colin COLE ◽  
Dwayne NIELSEN
Keyword(s):  
Dynamic Behaviour ◽  
Railway Track ◽  
Contact Friction ◽  
Slow Speed ◽  
Wear Process ◽  
Contact Wear ◽  
Rail Wear ◽  
Heavy Haul ◽  
Curve Radius ◽  
Heavy Haul Railway

Heavy haul railway track infrastructure are commonly equipped with balloon loops to allow trains to be loaded/unloaded and/or to reverse the direction of travel. The slow operational speed of trains on these sharp curves results in some unique issues regarding the wear process between wheels and rails. A wagon dynamic system model has been applied to simulate the dynamic behaviour in order to study the wheel–rail contact wear conditions. A wheel–rail wear index is used to assess the wear severity. The simulation shows that the lubrication to reduce the wheel–rail contact friction coefficient can significantly reduce the wear severity. Furthermore, the effects of important parameters on wheel–rail contact wear including curve radius, wagon speed and track superelevation have also been considered.

scholarly journals Experimental study on mechanical properties of heavy-haul low-vibration track under train static load

2020 ◽  
Vol 103 (2) ◽  
pp. 003685042092724
Author(s):  
Wuji Guo ◽  
Zhiping Zeng ◽  
Shiye Li ◽  
Weidong Wang ◽  
Abdulmumin Ahmed Shuaibu ◽  
...  
Keyword(s):  
Working Conditions ◽  
Static Load ◽  
Development Trend ◽  
Full Scale ◽  
Scale Model ◽  
Track Structure ◽  
Vertical Load ◽  
Wheel Load ◽  
Heavy Haul ◽  
Track Slab

In this paper, a full-scale model of Low Vibration Track was established and three working conditions were applied to a single bearing block; these include: vertical load at the end of the track slab, combination of horizontal and vertical load at the end of the track slab, and vertical load at the middle of the track slab. By applying four times static wheel load to the full-scale model, the relationship between the stress of the track structure and the load under different working conditions was investigated. The corresponding load values were obtained when the track slab and the bearing block reached the axial tensile strength of the concrete. Through the static load test, the weak position of the track structure was found, and the development trend of the crack was obtained. (1) Obtained the maximum stress of the concrete of the track slab at the corner of the bearing block, the maximal stress of the concrete of the track slab, the stress at the bottom of the bearing block, and the stress at the bottom of the bearing block under different working conditions. (2) The horizontal load of the train increased the force of the track slab concrete at the corners of the bearing block. (3) Compared the strain of different location of the track slab and different working conditions. (4) Observed the positions of slight crack and its development trend appeared on track slabs in different working conditions. (5) For the weak part of the track structure, it can be improved by measures such as increasing the thickness of the end of the track slab and arranging stirrups in the track slab around the support block. The research results provide reference for the design, application and maintenance of Low Vibration Track in the heavy-haul railway tunnel.

Dynamic Properties of High-Speed Turnouts under Foundation Settlement

2013 ◽  
Vol 671-674 ◽  
pp. 1174-1178 ◽  
Author(s):  
Xiao Pei Cai ◽  
Jin Shuai Qiu ◽  
Han Qian Liu
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
High Speed ◽  
Dynamic Properties ◽  
Track Structure ◽  
Foundation Settlement ◽  
Load Reduction ◽  
Lateral Vibration ◽  
Finite Element Software ◽  
Derailment Coefficient

Foundation settlement of high-speed turnouts has a significant impact on its security serve status. Based on the general finite element software ABQUS, a vehicle-turnout-roadbed coupled dynamic model was built, and the dynamic properties of NO.18 movable-point turnout were analyzed in this paper. The result shows that: the acceleration of switch rail and nose rail is larger than that of track in common section under foundation settlement; large vibration and deformation of the track structure arise when the vehicle is going through, meanwhile the peak of foundation lateral vibration response is higher than that of vibration caused by the vehicle passing switch rail. The derailment coefficient, rate of rail load reduction, the acceleration and displacement of track plate and foundation all increase with the settlement of foundation. On the contrary, they reduce as the length of subtense. Also, the dynamic response of high-speed turnout grows along with the speed of the increasing under foundation settlement.

Modeling Simulation of Reinforced Concrete Perforated Slab and Project Cost Analysis

2012 ◽  
Vol 193-194 ◽  
pp. 647-650
Author(s):  
Zhong Min Liu ◽  
Wei Gao ◽  
Jing Ji
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Plate Thickness ◽  
Perforated Plate ◽  
Vertical Load ◽  
Group Schemes ◽  
Finite Element Software ◽  
Modeling Simulation ◽  
Large Opening ◽  
Stress And Deformation

To determine the reinforced concrete perforated plate thickness and size of hole in a processing workshop, four kinds of scheme are given. In this article, finite element software ANSYS is used to analyze the stress and deformation under the action of vertical load on four cases. A group schemes which meet standard requirements are identified by comparison, and the normal use of large opening plate is ensured. It is a valuable reference for the design and analysis of the similar projects.

The Relationship between Deflection and Maximum Stress Distributed on the Layer Bottom in the Typical Semi-Rigid Bituminous Pavement Structure

2011 ◽  
Vol 97-98 ◽  
pp. 85-90 ◽  
Author(s):  
Zhi Zhong Zhao ◽  
Kui Li ◽  
Ning Zhang
Keyword(s):  
Finite Element ◽  
Maximum Stress ◽  
Structure Design ◽  
Construction Control ◽  
The Road ◽  
Finite Element Software ◽  
Pavement Structure ◽  
The Relationship ◽  
Highway Pavement

This article carries on the test to materials of the roadbed and the pavement in the room, and obtains mechanics computation parameter; Considered the road overload situation, we carries on the modeling computation to the typical semi-rigid bituminous pavement structure through using the finite element software; Carrying on the analysis, we obtains the correlation formula between the road deflection and various structures level maximum stress .it can provide the theory basis and the instruction experience for the highway pavement structure design, the examination and the construction control.

Coupling Model Analysis on Fluid Structure Interaction in Lifting Pipeling Based on ADINA

2012 ◽  
Vol 468-471 ◽  
pp. 238-244
Author(s):  
Zhao Wang ◽  
Zhi Jin Zhou ◽  
Hao Lu ◽  
Ze Jun Wen ◽  
Yi Min Xia
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Volume Concentration ◽  
Natural Frequencies ◽  
Fluid Structure Interaction ◽  
Element Model ◽  
Structure Design ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Finite Element Software

Using finite element software ADINA, three coupling models on fluid-structure interaction among internal fluid—pipe—external fluid in the lifting pipeline were researched. Firstly, coupling finite element model on fluid structure interaction of lifting pipeline was established and the first sixth order natural frequencies and principal vibration modes were attained at different ore conveying volume concentration and cross-section size of pipeline;Then natural frequencies of three couplings were compared with two couplings and no coupling according to the above condition, and FSI effect on natural frequency of pipeline was discussed. The calculation results were shown that the natural frequency of the pipe and its relative error reduced with the volume concentration and the relative wall thickness increased, which explain the reason that has better accuracy considering three couplings than other .These results have certain directive significance on the dynamic response, structure design and study of reduction vibration of lifting pipeline.

Structure Design and Finite Element Analysis of Liujiaba Inverted Siphon

2014 ◽  
Vol 716-717 ◽  
pp. 553-556
Author(s):  
Dong Yu Ji
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structure Design ◽  
Process Research ◽  
Construction Process ◽  
Force Analysis ◽  
Element Analysis ◽  
Finite Element Software ◽  
Inverted Siphon ◽  
Operating Process

This paper adopts general finite element software to carry out structure design and force analysis for Liujiaba inverted siphon engineering, researching variation law of the inverted siphon’s stress and displacement under various cases in construction process and operating process. Research results provides reliable reference for construction and operating of inverted siphon structure.

Numerical Simulation and Experimental Study of Static Driven Short Piles in the Dualistic Structure Stratum

2011 ◽  
Vol 55-57 ◽  
pp. 193-196
Author(s):  
Xin Gui Zhang ◽  
Xiang Gang Kong ◽  
Zhen Song
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Pile Foundation ◽  
Simulation Analysis ◽  
Measured Data ◽  
Vertical Load ◽  
Finite Element Software ◽  
Practical Engineering ◽  
Load Action ◽  
Dualistic Structure

In this paper, based on measured data of practical engineering, the characters of single short pile under the static vertical load action in the normal stratum combination model of dualistic structure has been simulated by using ABAQUS finite element software. Then simulated result and measured one has been compared and analyzed carefully. The analysis result indicated the applicability and reliability of ABAQUS finite element software in the simulation analysis of short pile. All these can provide some theoretical reference for design of short pile foundation.

A Study on the Earth Pressure of Top Culvert of High Embankment

2012 ◽  
Vol 178-181 ◽  
pp. 1104-1111 ◽  
Author(s):  
Shi Sheng Zhou ◽  
Xi Meng Sun ◽  
Jun Peng ◽  
Jia Lv
Keyword(s):  
Finite Element ◽  
Earth Pressure ◽  
Structure Design ◽  
Actual Condition ◽  
Test Model ◽  
Actual Situation ◽  
Theoretical Derivation ◽  
Finite Element Software ◽  
The Earth ◽  
Element Simulation

Based on the extensive research and analysis of actual condition of top culvert of high embankment, a calculation theory for the earth pressure of top culvert was presented. The theory could optimize the structure design for culverts, and reduce the waste of resource. First, based on the simplified assumption of the stress of soil on the top culvert and the analysis of single unit of the load on the top culvert, the calculation formula of earth pressure on different position of top culvert was presented by theoretical derivation. Then, to verified the results by using scaled test model and ABAQUS finite element software. Through the comparison with the traditional calculation theory and finite element simulation, we could prove that the calculation theory is more tallies with the actual situation of the earth pressure on the top culvert.

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