High-speed Railway最新文献_第2页

Intelligent human-computer interactive training assistant system for rail systems 铁路系统智能人机交互训练辅助系统

High-speed Railway Pub Date : 2025-03-01 DOI: 10.1016/j.hspr.2025.02.001

Yuexuan Li , Junhua Chen , Xiangyong Luo , Han Zheng

{"title":"Intelligent human-computer interactive training assistant system for rail systems","authors":"Yuexuan Li , Junhua Chen , Xiangyong Luo , Han Zheng","doi":"10.1016/j.hspr.2025.02.001","DOIUrl":"10.1016/j.hspr.2025.02.001","url":null,"abstract":"<div><div>In recent years, railway construction in China has developed vigorously. With continuous improvements in the high-speed railway network, the focus is gradually shifting from large-scale construction to large-scale operations. However, several challenges have emerged within the high-speed railway dispatching and command system, including the heavy workload faced by dispatchers, the difficulty of quantifying subjective expertise, and the need for effective training of professionals. Amid the growing application of artificial intelligence technologies in railway systems, this study leverages Large Language Model (LLM) technology. LLMs bring enhanced intelligence, predictive capabilities, robust memory, and adaptability to diverse real-world scenarios. This study proposes a human-computer interactive intelligent scheduling auxiliary training system built on LLM technology. The system offers capabilities including natural dialogue, knowledge reasoning, and human feedback learning. With broad applicability, the system is suitable for vocational education, guided inquiry, knowledge-based Q&A, and other training scenarios. Validation results demonstrate its effectiveness in auxiliary training, providing substantial support for educators, students, and dispatching personnel in colleges and professional settings.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"3 1","pages":"Pages 64-77"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739358","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

Study on structure-borne noise characteristics and noise reduction of “integrated station-bridge” high-speed railway station 高铁“站桥一体”车站结构噪声特性及降噪研究

High-speed Railway Pub Date : 2025-03-01 DOI: 10.1016/j.hspr.2025.01.001

Bowen Hou , Xinhao Liang , Di Wang

{"title":"Study on structure-borne noise characteristics and noise reduction of “integrated station-bridge” high-speed railway station","authors":"Bowen Hou , Xinhao Liang , Di Wang","doi":"10.1016/j.hspr.2025.01.001","DOIUrl":"10.1016/j.hspr.2025.01.001","url":null,"abstract":"<div><div>Due to its high space utilization efficiency and overall advantages, the \"integrated station-bridge\" design is widely used in high-speed rail stations. However, compared to traditional separated station-bridge structures, the structure-borne noise generated by high-speed trains passing through these stations is more pronounced. To investigate the structure-borne noise radiation characteristics of these station designs, we developed a noise simulation model for the \"integrated station-bridge\" high-speed railway station and validated its reliability through comparison with test results. Building on this, we implemented the floating track slab between the track structure and the station platform to mitigate structure-borne noise. Furthermore, we examined the factors influencing the noise reduction effectiveness of the floating floor. The results indicated that train passages result in significant structure-borne noise issues in \"integrated station-bridge\" stations. The maximum sound pressure levels at the waiting hall and platform exceed 70 dB(A). After the implementation of the floating floor, the maximum sound pressure levels on each floor decreased by 11–14 dB(A). Additionally, increasing the thickness of the floating floor and reducing the stiffness of the steel spring bearings both enhanced the noise reduction effectiveness of the floating floor.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"3 1","pages":"Pages 17-27"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739353","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

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}

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

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

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

引用次数: 0

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