High-speed Railway最新文献_第3页

Research and application of key technologies for intelligent control and detection in prestressed construction of railway bridge 铁路桥梁预应力施工智能控制与检测关键技术研究与应用

High-speed Railway Pub Date : 2025-03-01 DOI: 10.1016/j.hspr.2025.01.003

Di Hao

引用次数: 0

Advanced 6 G wireless communication technologies for intelligent high-speed railways 面向智能高铁的先进6g无线通信技术

High-speed Railway Pub Date : 2025-03-01 DOI: 10.1016/j.hspr.2024.11.007

Wei Chen , Bo Ai , Yuxuan Sun , Cong Yu , Bowen Zhang , Chau Yuen

{"title":"Advanced 6 G wireless communication technologies for intelligent high-speed railways","authors":"Wei Chen , Bo Ai , Yuxuan Sun , Cong Yu , Bowen Zhang , Chau Yuen","doi":"10.1016/j.hspr.2024.11.007","DOIUrl":"10.1016/j.hspr.2024.11.007","url":null,"abstract":"<div><div>The rapid expansion of railways, especially High-Speed Railways (HSRs), has drawn considerable interest from both academic and industrial sectors. To meet the future vision of smart rail communications, the rail transport industry must innovate in key technologies to ensure high-quality transmissions for passengers and railway operations. These systems must function effectively under high mobility conditions while prioritizing safety, eco-friendliness, comfort, transparency, predictability, and reliability. On the other hand, the proposal of 6 G wireless technology introduces new possibilities for innovation in communication technologies, which may truly realize the current vision of HSR. Therefore, this article gives a review of the current advanced 6 G wireless communication technologies for HSR, including random access and switching, channel estimation and beamforming, integrated sensing and communication, and edge computing. The main application scenarios of these technologies are reviewed, as well as their current research status and challenges, followed by an outlook on future development directions.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"3 1","pages":"Pages 78-92"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Influence of particle size distribution and normal pressure on railway ballast: A DEM approach 铁路道砟颗粒粒度分布和正压对其影响的DEM方法

High-speed Railway Pub Date : 2025-03-01 DOI: 10.1016/j.hspr.2024.12.001

Z. Yan, Ali Zaoui, W. Sekkal

{"title":"Influence of particle size distribution and normal pressure on railway ballast: A DEM approach","authors":"Z. Yan, Ali Zaoui, W. Sekkal","doi":"10.1016/j.hspr.2024.12.001","DOIUrl":"10.1016/j.hspr.2024.12.001","url":null,"abstract":"<div><div>Developing the railway transport sector is a challenging scientific, economic and social research topic starting with ensuring human security. The main topic that should be developed in that sense is the ballast stability and dynamical behaviour under external loading and environmental changes. This paper investigates the effect of particle size distribution and normal pressure on the mechanical response of a ballast bed. Grading curves of ballast layers with different sizes are illustrated to discuss their strength behaviour under various strains to deduce the significant effect on the direct shear performance of the ballast layer. Direct shear tests with different Particle Size Distribution (PSD) were reproduced using the Discrete Element Method (DEM). It is noticed that when the number of small-sized ballast increases, the shear strength and the friction angle increase to varying degrees under different normal pressures, with an average increase of 27 % and 8 %, respectively. When the number of large-sized ballast decreases, the shear strength and the friction angle decrease to varying degrees under different normal pressures, with an average decrease of 6 % and 3 %, respectively.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"3 1","pages":"Pages 28-36"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of guidance signs on platform evacuation in suburban railway tunnel under smoke and obstacle environment 烟障环境下城郊铁路隧道引导标志对站台疏散的影响

High-speed Railway Pub Date : 2025-03-01 DOI: 10.1016/j.hspr.2025.01.002

Yifan Zhuang , Fan Wang , Yuanchun Huang , Xiaomin Song , Ya Rao

{"title":"Influence of guidance signs on platform evacuation in suburban railway tunnel under smoke and obstacle environment","authors":"Yifan Zhuang , Fan Wang , Yuanchun Huang , Xiaomin Song , Ya Rao","doi":"10.1016/j.hspr.2025.01.002","DOIUrl":"10.1016/j.hspr.2025.01.002","url":null,"abstract":"<div><div>Once a train stops in a tunnel section and requires emergency evacuation, the large distance between stations and long walking distances in the underground spaces of suburban railway systems pose potential risks to the evacuation process on tunnel platforms, especially in complex environments. This study utilized Virtual Reality (VR) technology to construct a virtual experimental platform for tunnel evacuation in suburban railway systems, simulating different combinations of smoke and obstacle conditions. By requiring participants to wear VR glasses and walk on an omnidirectional treadmill for moving, as well as complete psychological questionnaires, the study reveals the influences of No Guiding (NG) signs, Wall-Guided (WG) signs, and Central axis Guidance (CG) signs on the movement abilities and psychological behaviors of participants contrastively. The results show that either smoke conditions or obstacle positions affect the mental stress of participants, and the guidance sign has a positive effect on reducing the mental stress. There is an inverse relationship between mental stress and movement abilities. WG and CG signs respectively lead participants to walk closer to walls and along the central axis, which is conducive to reducing the variation in participants’ behavior characteristics when circumventing obstacles on the wall side or track side under smoke conditions, respectively. Additionally, CG signs reduce the speed fluctuations of participants before circumventing obstacles, improving the stability of the distance from the wall and speed under smoke conditions, compared to NG and WG signs. These findings contribute to understanding the evacuation psychological-behavioral-movement characteristics of pedestrians on evacuation platforms in suburban railway tunnels and provide a basis for improving the safety design of evacuation guidance signs.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"3 1","pages":"Pages 1-16"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic squeezing behavior of tamping machine in railway maintenance 铁路养护中夯实机的动态挤压特性

High-speed Railway Pub Date : 2024-12-01 DOI: 10.1016/j.hspr.2024.11.001

Liang Gao , Shunwei Shi , Chang Liu , Yixiong Xiao , Chunyu Wang , Yuze Wang

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Overview of China high-speed railway earthquake early-warning system 中国高速铁路地震预警系统概述

High-speed Railway Pub Date : 2024-12-01 DOI: 10.1016/j.hspr.2024.10.001

Mingduan Liu , Kai Liu

引用次数: 0

Topology optimization of a ratchet compensation structure subject to periodic constraints 受周期约束的棘轮补偿结构的拓扑优化

High-speed Railway Pub Date : 2024-12-01 DOI: 10.1016/j.hspr.2024.11.003

Taining Qi , Tao Yan , Shiju Song , Yu Zhu , Geng Chen

{"title":"Topology optimization of a ratchet compensation structure subject to periodic constraints","authors":"Taining Qi , Tao Yan , Shiju Song , Yu Zhu , Geng Chen","doi":"10.1016/j.hspr.2024.11.003","DOIUrl":"10.1016/j.hspr.2024.11.003","url":null,"abstract":"<div><div>The railway pantograph-catenary system employs a ratchet compensation device to sustain the tension of the contact wire. However, the excessive weight associated with the ratchet structure adversely affects the performance of the compensation device. An optimization design aimed at lightweight optimization of the ratchet wheel structure can enhance the system’s agility, improve material utilization, and reduce costs. This study uses a finite element model to establish an equivalent load model for the ratchet under service conditions and analyzes its load-bearing state. An optimization model was created and solved using ANSYS Workbench. The topological optimization configurations were compared under unconstrained conditions and four different periodic constraint scenarios. Following this, the structure was redesigned based on the topological optimization results, and a simulation analysis was conducted to compare the reconstructed model with the original model. The comparison results indicate that the masses of all four optimized models have been reduced by more than 10 %. Additionally, under conditions of a fully wound compensation rope, the maximum stress has decreased by over 20 %, leading to a more uniform stress distribution and improved overall performance. The topology optimization and redesign method based on periodic constraints offers a viable engineering solution for the lightweight design of the ratchet structure.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"2 4","pages":"Pages 230-240"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143303043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic response of high-speed railway vehicle and welded turnout on large-span bridges based on rigid-flexible coupling system 基于刚柔耦合系统的高速铁路车辆与焊接道岔大跨度桥梁动力响应

High-speed Railway Pub Date : 2024-12-01 DOI: 10.1016/j.hspr.2024.09.001

Xiaopei Cai , Zijie Zhong , Albert Lau , Qian Zhang , Yue Hou

{"title":"Dynamic response of high-speed railway vehicle and welded turnout on large-span bridges based on rigid-flexible coupling system","authors":"Xiaopei Cai , Zijie Zhong , Albert Lau , Qian Zhang , Yue Hou","doi":"10.1016/j.hspr.2024.09.001","DOIUrl":"10.1016/j.hspr.2024.09.001","url":null,"abstract":"<div><div>Welded Turnout on Large-span Bridge (WTLB) is a complex multi-layer heterogeneous system and can significantly influence the service performance of High-Speed Railway (HSR). Understanding the coupling dynamic response of the vehicle and WTLB is essential. Previous research did not consider the dynamic behavior of foundations, leading to an underestimation of the vehicle-turnout-foundation coupling dynamic response, particularly when turnouts were laid on large-span bridges. This study proposes a novel modeling method that includes the foundations, to overcome the previous shortcomings by applying a rigid-flexible coupling system. In this approach, the vehicle was modeled as a rigid body sub-model in a Multi-Body Software (MBS), while WTLB was modeled as a flexible bodies sub-model using Finite Element (FE) software. The modal information from the FE model was imported into the MBS software. The two sub-models were coupled by the wheel-rail contact in the MBS environment and then the Vehicle-turnout-bridge Rigid-flexible Coupling Dynamic (VRCD) calculation model was established and it was discovered that the calculation results showed good agreement with the field test data. Through the VRCD model, the safety of the structure, the stability of the vehicle and the comfort of passengers were investigated, as well as several important infrastructure factors. The results demonstrate that this novel method provides accurate calculations and highlights the complex and significant interactions in the vehicle-turnout-bridge system.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"2 4","pages":"Pages 203-218"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143303044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Local and global sensitivity analysis for railway upgrading between hydrogen fuel cell and electrification 铁路氢燃料电池升级与电气化的局部和全局敏感性分析

High-speed Railway Pub Date : 2024-12-01 DOI: 10.1016/j.hspr.2024.11.002

Yizhe Zhang , Zhongbei Tian , Kangrui Jiang , Stuart Hillmansen , Clive Roberts

{"title":"Local and global sensitivity analysis for railway upgrading between hydrogen fuel cell and electrification","authors":"Yizhe Zhang , Zhongbei Tian , Kangrui Jiang , Stuart Hillmansen , Clive Roberts","doi":"10.1016/j.hspr.2024.11.002","DOIUrl":"10.1016/j.hspr.2024.11.002","url":null,"abstract":"<div><div>In the field of rail transit, the UK Department of Transport stated that it will realize a comprehensive transformation of UK railways by 2050, abandoning traditional diesel trains and upgrading them to new environmentally friendly trains. The current mainstream upgrade methods are electrification and hydrogen fuel cells. Comprehensive upgrades are costly, and choosing the optimal upgrade method for trams and mainline railways is critical. Without a sensitivity analysis, it is difficult for us to determine the influence relationship between each parameter and cost, resulting in a waste of cost when choosing a line reconstruction method. In addition, by analyzing the sensitivity of different parameters to the cost, the primary optimization direction can be determined to reduce the cost. Global higher-order sensitivity analysis enables quantification of parameter interactions, showing non-additive effects between parameters. This paper selects the main parameters that affect the retrofit cost and analyzes the retrofit cost of the two upgrade methods in the case of trams and mainline railways through local and global sensitivity analysis methods. The results of the analysis show that, given the current UK rail system, it is more economical to choose electric trams and hydrogen mainline trains. For trams, the speed at which the train travels has the greatest impact on the final cost. Through the sensitivity analysis, this paper provides an effective data reference for the current railway upgrading and reconstruction plan and provides a theoretical basis for the next step of train parameter optimization.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"2 4","pages":"Pages 219-229"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143303042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A miniaturized wideband high-gain end-fire antenna for 5G-R communication applications 一种用于5G-R通信应用的小型化宽带高增益端射天线

High-speed Railway Pub Date : 2024-12-01 DOI: 10.1016/j.hspr.2024.11.004

Yutong Shi , Yanliang Wu , Changhai Hu , Zheng Ma , Wen Luo

{"title":"A miniaturized wideband high-gain end-fire antenna for 5G-R communication applications","authors":"Yutong Shi , Yanliang Wu , Changhai Hu , Zheng Ma , Wen Luo","doi":"10.1016/j.hspr.2024.11.004","DOIUrl":"10.1016/j.hspr.2024.11.004","url":null,"abstract":"<div><div>This paper presents a miniaturized wideband high-gain microstrip end-fire antenna specifically designed for 5G-R communication applications. The antenna structure comprises a microstrip folded dipole resonator and end-fire directing units. By employing Intercalated Coupling Structures (ICS) between the folded dipole resonator and the ground plane, the resonant frequency of the antenna is shifted to lower frequencies, thereby significantly enhancing the operational bandwidth. Furthermore, the inclusion of three end-fire directing units positioned in front of the folded dipole oscillator substantially improves the antenna's end-fire gain. The designed antenna exhibits a relative impedance bandwidth of 46 % (ranging from 1.36 to 2.18 GHz), with a peak gain of 7.33 dBi at the 2100 MHz 5G-R frequency band. The overall dimensions of the antenna are 0.31<em>λ</em><sub>L</sub> × 0.39<em>λ</em><sub>L</sub> × 0.008<em>λ</em><sub>L</sub>, where <em>λ</em><sub>L</sub> denotes the wavelength at the lowest frequency. The proposed antenna demonstrates a broad operational bandwidth, rendering it suitable for 5G-R mobile communications.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"2 4","pages":"Pages 259-264"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143303045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0