High-speed Railway最新文献_第8页

Performance of the suspension method in large cross-section shallow-buried tunnels 悬架法在大断面浅埋隧道中的性能研究

High-speed Railway Pub Date : 2023-12-01 DOI: 10.1016/j.hspr.2023.11.002

Guoqing Cai , Xinxiang Zou , Qiang Zhang , Rui Yang , Tianchi Wu , Jiguang Li

{"title":"Performance of the suspension method in large cross-section shallow-buried tunnels","authors":"Guoqing Cai , Xinxiang Zou , Qiang Zhang , Rui Yang , Tianchi Wu , Jiguang Li","doi":"10.1016/j.hspr.2023.11.002","DOIUrl":"10.1016/j.hspr.2023.11.002","url":null,"abstract":"<div><div>Large cross-section tunnel construction induces ground surface settlements, potentially endangering both subterranean projects and nearby above-ground structures. A novel tunnel construction method, known as the suspension method, is introduced in this paper to mitigate surface settlement. The suspension method employs vertical tie rods to establish a structural connection between the initial tunnel support system and the surface steel beam, thereby exerting effective control settlements. To analyze the performance of the proposed method, systematic numerical simulations were conducted based on the practical engineering of Harbin Subway Line 3. The surface settlement and vault settlement characteristics during construction are investigated. The results show a gradual increment in both surface and vault settlement throughout the construction process, culminating in a stabilized state upon the completion of construction. In addition, compared to the double-side drift method and the Cross Diaphragm Method (CRD) method, the suspension method can obviously reduce the surface settlement and vault settlement. Moreover, the surface settlements and the axial force of tie rods were continuously monitored during the construction process at the trial tunnel block. These specific monitoring measurements are illustrated in comparison to numerical analysis results. The monitored results show great agreement with the numerical predictions, confirming the success of the project. This research can serve as a valuable practical reference for similar projects, offering insights and guidance for addressing ground surface settlements and enhancing construction safety in the domain of large cross-section tunneling.</div></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"1 4","pages":"Pages 224-232"},"PeriodicalIF":0.0,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143200326","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

Refined disturbance observer based prescribed performance fixed-time control of high-speed EMS Trains with track irregularities 基于扰动观测器的轨道不平整高速EMS列车预定性能定时控制

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.09.001

Yiran Xie, Boyang Zhao, Xiuming Yao

引用次数: 0

Development of a software platform for bridge modal and damage identification based on ambient excitation 基于环境激励的桥梁模态与损伤识别软件平台的开发

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.09.003

Jiahuan Li, Li Zhu, Wenyu Ji, Sunfeng You

{"title":"Development of a software platform for bridge modal and damage identification based on ambient excitation","authors":"Jiahuan Li, Li Zhu, Wenyu Ji, Sunfeng You","doi":"10.1016/j.hspr.2023.09.003","DOIUrl":"https://doi.org/10.1016/j.hspr.2023.09.003","url":null,"abstract":"<div><p>Modal and damage identification based on ambient excitation can greatly improve the efficiency of high-speed railway bridge vibration detection. This paper first describes the basic principles of stochastic subspace identification, peak-picking, and frequency domain decomposition method in modal analysis based on ambient excitation, and the effectiveness of these three methods is verified through finite element calculation and numerical simulation. Then the damage element is added to the finite element model to simulate the crack, and the curvature mode difference and the curvature mode area difference square ratio are calculated by using the stochastic subspace identification results to verify their ability of damage identification and location. Finally, the above modal and damage identification techniques are integrated to develop a bridge modal and damage identification software platform. The final results show that all three modal identification methods can accurately identify the vibration frequency and mode shape, both damage identification methods can accurately identify and locate the damage, and the developed software platform is simple and efficient.</p></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"1 3","pages":"Pages 162-170"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949867823000405/pdfft?md5=39e61979d0df0503c93d9e8f98f3841d&pid=1-s2.0-S2949867823000405-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90011970","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

Refined disturbance observer based prescribed performance fixed-time control of high-speed EMS trains with track irregularities 基于扰动观测器的轨道不平整高速EMS列车预定性能定时控制

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.09.001

Yiran Xie, Boyang Zhao, Xiuming Yao

{"title":"Refined disturbance observer based prescribed performance fixed-time control of high-speed EMS trains with track irregularities","authors":"Yiran Xie, Boyang Zhao, Xiuming Yao","doi":"10.1016/j.hspr.2023.09.001","DOIUrl":"https://doi.org/10.1016/j.hspr.2023.09.001","url":null,"abstract":"<div><p>High-speed Electromagnetic Suspension (EMS) train is continuously impacted by the irregularity of the track, which worsens the levitation performance of the train. In this paper, a composite control scheme for the EMS is proposed to suppress track irregularities by integrating a Refined Disturbance Observer (RDO) and a Prescribed Performance Fixed-Time Controller (PPFTC). The RDO is designed to estimate precisely the track irregularities and lumped disturbances with uncertainties and exogenous disturbances in the suspension system, and reduce input chattering by applying to the disturbance compensation channel. PPFTC is designed to converge the suspension air gap error to equilibrium point with prescribed performance by completing error conversion, and solve the fast dynamic issue of EMS. And the boundary of overshoot and steady-state is limited in the ranged prescribed. A theoretical analysis is conducted on the stability of the proposed control method. Finally, the effectiveness and reasonability of the proposed composite anti-disturbance control scheme is verified by simulation results.</p></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"1 3","pages":"Pages 171-178"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949867823000351/pdfft?md5=3df66dad792017c91cf764af7add0f0d&pid=1-s2.0-S2949867823000351-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91668673","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

The design and application of BIM + refined management and control platform for the Jingxiong railway bridge 京雄铁路桥BIM +精细化管控平台设计与应用

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.07.001

Jinghan Zhang, Jiayu Li, Beisheng Liu, Hui Li, Wei Yang

引用次数: 0

Research on railway BIM platform framework based on homemade graphics engine 基于国产图形引擎的铁路BIM平台框架研究

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.08.001

He Meng , Xukun Yang , Liang Gao , Changjin Wang

引用次数: 0

Carbon emissions reduction potentiality for railroad transportation based on life cycle assessment 基于生命周期评价的铁路运输碳减排潜力

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.08.004

Yintao Lu , Tongtong Zhang , Shengming Qiu , Xin Liu , Xiaohua Yu , Hong Yao

{"title":"Carbon emissions reduction potentiality for railroad transportation based on life cycle assessment","authors":"Yintao Lu , Tongtong Zhang , Shengming Qiu , Xin Liu , Xiaohua Yu , Hong Yao","doi":"10.1016/j.hspr.2023.08.004","DOIUrl":"https://doi.org/10.1016/j.hspr.2023.08.004","url":null,"abstract":"<div><p>This study addresses the comparative carbon emissions of different transportation modes within a unified evaluation framework, focusing on their carbon footprints from inception to disposal. Specifically, the entire life cycle carbon emissions of High-Speed Rail (HSR), battery electric vehicles, conventional internal combustion engine vehicles, battery electric buses, and conventional internal combustion engine buses are analyzed. The life cycle is segmented into vehicle manufacturing, fuel or electricity production, operational, and dismantling-recycling stages. This analysis is applied to the Beijing-Tianjin intercity transportation system to explore emission reduction strategies. Results indicate that HSR demonstrates significant carbon emission reduction, with an intensity of only 24 %–32 % compared to private vehicles and 47 %–89 % compared to buses. Notably, HSR travel for Beijing-Tianjin intercity emits only 24 % of private vehicle emissions, demonstrating the emission reduction benefits of transportation structure optimization. Additionally, predictive modeling reveals the potential for carbon emission reduction through energy structure optimization, providing a guideline for the development of effective transportation management systems.</p></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"1 3","pages":"Pages 195-203"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S294986782300034X/pdfft?md5=5baa9d7eedf669f4dda481d1f38393d0&pid=1-s2.0-S294986782300034X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91668669","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

Optimal edge-cloud collaboration based strategies for minimizing valid latency of railway environment monitoring system 基于边缘云协作的铁路环境监测系统有效延迟最小化策略

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.09.002

Xiaoping Ma , Jing Zhao , Limin Jia , Xiyuan Chen , Zhe Li

{"title":"Optimal edge-cloud collaboration based strategies for minimizing valid latency of railway environment monitoring system","authors":"Xiaoping Ma , Jing Zhao , Limin Jia , Xiyuan Chen , Zhe Li","doi":"10.1016/j.hspr.2023.09.002","DOIUrl":"https://doi.org/10.1016/j.hspr.2023.09.002","url":null,"abstract":"<div><p>Response speed is vital for the railway environment monitoring system, especially for the sudden-onset disasters. The edge-cloud collaboration scheme is proved efficient to reduce the latency. However, the data characteristics and communication demand of the tasks in the railway environment monitoring system are all different and changeable, and the latency contribution of each task to the system is discrepant. Hence, two valid latency minimization strategies based on the edge-cloud collaboration scheme is developed in this paper. First, the processing resources are allocated to the tasks based on the priorities, and the tasks are processed parallelly with the allocated resources to minimize the system valid latency. Furthermore, considering the differences in the data volume of the tasks, which will induce the waste of the resources for the tasks finished in advance. Thus, the tasks with similar priorities are graded into the same group, and the serial and parallel processing strategies are performed intra-group and inter-group simultaneously. Compared with the other four strategies in four railway monitoring scenarios, the proposed strategies proved latency efficiency to the high-priority tasks, and the system valid latency is reduced synchronously. The performance of the railway environment monitoring system in security and efficiency will be promoted greatly with the proposed scheme and strategies.</p></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"1 3","pages":"Pages 185-194"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949867823000363/pdfft?md5=0ec6a48b35b6c531cb645df9e6226a6b&pid=1-s2.0-S2949867823000363-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91668671","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

The research on the high strength and anti-arc ablation coatings applied in steel conductive rail 钢轨用高强度抗电弧烧蚀涂层的研究

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.08.002

Yihu Ma , Wenbo Yu , Chaosheng Ma , Guozheng Ma

{"title":"The research on the high strength and anti-arc ablation coatings applied in steel conductive rail","authors":"Yihu Ma , Wenbo Yu , Chaosheng Ma , Guozheng Ma","doi":"10.1016/j.hspr.2023.08.002","DOIUrl":"https://doi.org/10.1016/j.hspr.2023.08.002","url":null,"abstract":"<div><p>In order to enhance the ablation-resistant performance of stainless-steel conductive rails, Mo coating, 410 stainless steel coating and 15 wt% Cr<sub>2</sub>AlC particles reinforced 410 stainless steel composite coating were prepared and evaluated. Different from the weak interfacial strength caused by the dissimilar metals between Mo and steel rails, 410 stainless steel coating has better interfacial contact with steel rails. The introduction of Cr<sub>2</sub>AlC into 410 stainless steels further strengthened the mechanical properties of coating by alloy strengthening effect and particle strengthening effect, as the decomposition of Cr<sub>2</sub>AlC into nano CrC particles is accompanied with the diffusion of Al atoms into 410 stainless steels. It was found that the composite coating can still resist arc erosion at 150 A current, as a dense oxide film formed during the ablation process and the decomposition of Cr<sub>2</sub>AlC contributed to the heat absorption.</p></div>","PeriodicalId":100607,"journal":{"name":"High-speed Railway","volume":"1 3","pages":"Pages 179-184"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2949867823000326/pdfft?md5=cce55c43351dc78176b62db83be24352&pid=1-s2.0-S2949867823000326-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91668672","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

Carbon emissions reduction potentiality for railroad transportation based on life cycle assessment 基于生命周期评价的铁路运输碳减排潜力

High-speed Railway Pub Date : 2023-09-01 DOI: 10.1016/j.hspr.2023.08.004

Yintao Lu, Tongtong Zhang, Shengming Qiu, Xin Liu, Xiaohua Yu, Hong Yao

引用次数: 0