西南交通大学学报

Seismic Response of Continuous Beam-Arch Bridge under Spatially Varying Ground Motions

LI Xiaozhen, YANG Dehai, LEI Kangning, XIAO Lin, DAI Shengyong

2021, 56(2): 221-228. doi: 10.3969/j.issn.0258-2724.20190400

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In order to investigate the dynamic responses of a long-span continuous beam-arch bridge subjected to multi-support and multi-dimensional ground motions, a finite element model for a concrete-filled steel tubular arch bridge with a span of 139 m in South China was built using OpenSEES software. The ...

Seismic Responses Analysis of Train-Track-Bridge System Considering Pile-Soil Interaction

LEI Hujun, HUANG Jiangze

2021, 56(2): 229-237. doi: 10.3969/j.issn.0258-2724.20190694

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Understanding the influence of pile-soil interaction on seismic responses of a train-bridge system is necessary for studying the safety of trains running over high-speed railway bridges under earthquake. Based on the train-track-bridge coupled vibration theory, the Winkler foundation beam is used to...

Effect Mechanism of Central Slot Width on Vortex-Induced Vibration Characteristics of Streamlined Box Girders

CHEN Xingyu, XU Xinyu, ZHENG Xiaolong, ZENG Yongping, LI Yongle

2021, 56(2): 238-245. doi: 10.3969/j.issn.0258-2724.20190505

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The streamlined box girders with central slots usually have good flutter stability, but the vortex-induced vibration (VIV) performance of such box girders at large angles of attack is not clear. For the streamlined box girder section of a long-span bridge, the flow field characteristics and VIV perf...

Rapid Recognition of Rock Mass Fractures in Tunnel Faces

LENG Biao, ZHANG Yi, YANG Hui, HOU Gaopeng

2021, 56(2): 246-252, 322. doi: 10.3969/j.issn.0258-2724.20190749

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Tunnel faces contain much geological information, which, if fully extracted and analyzed, will help to evaluate the geological state of tunnel engineering and guide tunnel design and construction. In this paper, rock mass crack detection, extraction and grouping algorithms of the tunnel face are stu...

Stress Relaxation Behavior and Mechanism of Rock Joint Planes with Different Roughness

WANG Zhen, GU Linlin, SHEN Mingrong

2021, 56(2): 253-260. doi: 10.3969/j.issn.0258-2724.20190395

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Stress relaxation is an important part of time-dependent behavior of rock joints, and also an important factor affecting the long-term stability of engineering rock masses. To study the stress relaxation characteristics of rock joints with different roughness and further explore the stress relaxatio...

Wind Load Characteristics of Large-Span Shell-Shaped Roof with Decorative Spiral Strips

LIN Yongjun, LIN Chitan, ZHOU Yi, LIU Kaiqi, PAN Yi

2021, 56(2): 261-271. doi: 10.3969/j.issn.0258-2724.20190472

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In order to understand the effect of decorative structure on the wind load characteristics of a large-span shell-shaped roof, the wind pressure distribution characteristics of a high-speed railway station roof with a decorative spiral strip on a certain surface were studied. First, a numerical wind ...

Experimental Study on Flexural Capacity of PP-ECC Beam

LI Fuhai, HU Dinghan, YU Yongjiang, WANG Jiangshan, JIN Hesong

2021, 56(2): 272-281. doi: 10.3969/j.issn.0258-2724.20190081

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To study the difference of mechanical properties between PP-ECC (polypropylene fiber cement-based composite) beam and ordinary reinforced concrete beam under bending load, the bending performance of PP-ECC beam was tested through four point bending load. Firstly, the bending failure process of PP-EC...

Effect of Brace-to-Chord Angle on Performance of Unstiffened Circular Hollow Section X-Joints under Brace Axial Force

ZHAO Bida, LI Ke, LIU Chengqing, WU Jianguo

2021, 56(2): 282-288. doi: 10.3969/j.issn.0258-2724.20190041

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In order to study the effect of brace-to-chord angle (BCA) on the performance of unstiffened circular hollow section (CHS) X-joints under brace axial force, experimental test was carried out to verified finite element (FE) model. Then FE parameter analysis were used to study the effect of BCA on the...

Prediction Analysis of Rail Wear in Switch Panel for No.42 High-Speed Turnout

WANG Pu

2021, 56(2): 289-299. doi: 10.3969/j.issn.0258-2724.20200060

[Abstract](639)

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In order to make up for the lack of theoretical research on the rail wear characteristics of No.42 high-speed turnout, a numerical prediction model for rail wear development of high-speed turnout was established. The rail wear depth distribution was calculated according to the Archard’s material wea...

Derailment Mechanism and Influence Factors on Number 6 Symmetric Switches

SI Daolin, WANG Shuguo, WANG Meng, YANG Dongsheng, WANG Pu

2021, 56(2): 300-305. doi: 10.3969/j.issn.0258-2724.20190870

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Plenty of derailments in number 6 symmetric switches occur in recent years, the derailment issue has not yet been addressed successfully. In order to discover causes and put forward reasonable measurement, the wheel/rail contact feature was analyzed based on the quasi-static theory. The coupling dyn...

2D Bin Packing Method for Fragmented Textures Optimization of Detailed Building Model

ZHU Qing, ZHANG Linlin, HU Han, WENG Qiqiang, DING Yulin, LI Yun, ZHANG Yeting

2021, 56(2): 306-313. doi: 10.3969/j.issn.0258-2724.20190103

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To solve the problem of long loading time and low real-time rendering efficiency caused by large amount of fragmented textures of the detailed building model, a 2D bin packing method for fragmented textures optimization of the detailed building model was presented. The union regions of shared textur...

Analysis on Layouts of Pedestal and Adjacent Podiums in Hangzhou in Wind Environment

YING Xiaoyu, LIANG Xiaoxin, LI Siyuan, DU Shiqi, GRACE Ding

2021, 56(2): 314-322. doi: 10.3969/j.issn.0258-2724.20190322

[Abstract](479)

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To explore how the pedestal and adjacent layout of podiums around highrise office buildings affect the wind environment at the pedestrian height (1.5 m) of outdoor, a single highrise building in the area is selected as the object to analyze its position, height, windward side width and thickness of ...

Coefficient Matrix Properties of Downward Continuation for Potential Fields and Barzilai-Borwein Downward Continuation Method

ZHANG Zhihou, LIAO Xiaolong, YAO Yu, FAN Xiangtai, LU Runqi

2021, 56(2): 323-330, 362. doi: 10.3969/j.issn.0258-2724.20190440

[Abstract](534)

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Downward continuation of potential fields can not only improve the reliability of geophysical data interpretation, but also plays an important role in navigation. In order to further enhance the calculation accuracy and speed of downward continuation, the Barzilai-Borwein (BB) downward continuation ...

Analysis of Astrometry Accuracy Considering Effects of Bulletin A

CHEN Shaojie, GAO Yuping, SHI Chunlin, YIN Dongshan, WANG Pingli, LIU Na, QIN Wei

2021, 56(2): 331-338. doi: 10.3969/j.issn.0258-2724.20200218

[Abstract](552)

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Earth orientation parameters (EOP) is of very importance to astronomical data calculation and its accuracy affects the final positioning and orientation. At present, there is no technical means to obtain high-precision EOP observation value in real time, which mainly relies on the Bulletin A forecas...

Economic Dispatch for Power Systems of Multiple Wind Farms Based on MVTV Copula Method

LI Qi, PAN Yuru, QIU Yibin, CHEN Weirong

2021, 56(2): 339-346. doi: 10.3969/j.issn.0258-2724.20190459

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As the correlation of multiple wind power outputs is of great significance for the economic dispatch analysis of wind farm power systems, the mix vine time-varying Copula (MVTV Copula) is proposed to construct the random scenarios of multiple wind power outputs.The economic dispatch model is built w...

Mechanical Characteristics of High-Speed Railway Catenary Cantilever System

ZHANG Jing, LIU Jinzeng, LIU Zhigang, CHU Wenping

2021, 56(2): 347-353. doi: 10.3969/j.issn.0258-2724.20190040

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In order to solve problems of parts’ fatigue cracks and falling off in the cantilever system for high-speed railway catenary, a study was conducted to investigate mechanical characteristics of the cantilever system. First, a finite element model of the cantilever system was established, whereby the ...

Fast Power Tracking Step-Scanning Method of Vehicle-Mounted Photovoltaic System with Moving Shadows

HAN Guopeng, XUE Congcong, WANG Wei, CHEN Weirong, GUO Ai, DAI Chaohua, LIU Zhengjie

2021, 56(2): 354-362. doi: 10.3969/j.issn.0258-2724.20191183

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Moving shadows bring great challenges to maximum power point tracking (MPPT) of vehicle-mounted photovoltaic power generation systems. In order to improve the speed of MPPT under moving shadow occlusion, a new adaptive step-scanning method for global maximum power point tracking (GMPPT) of vehicle p...

Stochastic Resonance of Fractional-Order System with Multiplicative Noise and Random Delay

ZHU Jianqu, JIN Weidong, GUO Feng

2021, 56(2): 363-370. doi: 10.3969/j.issn.0258-2724.20191181

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Time delay is a common characteristic of a dynamic system, which has been widely used in the science field. Fractional calculus has the characteristics of time memory and long-range spatial correlation, which can better describe the physical process with memory and path dependence, but rare literatu...

Investment Strategy and Evolution Analysis on Value-Added Service of Logistics Information Platform

GUI Yunmiao, LIU Dayu, GONG Bengang

2021, 56(2): 371-377, 384. doi: 10.3969/j.issn.0258-2724.20190477

[Abstract](536)

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In order to improve the competitive advantage of logistics information platform, in view of the evolutionary relationship, the investment strategy of the value-added service offered by the platform is explored. Firstly, the user utility function and platform profit function are established by analyz...

Effect Analysis of Coupler Force onHeavy-Haul Train Safety Under Eccentric Loads

WANG Wei, PENG Qiyuan, WANG Qi, XIAO Xinbiao

2021, 56(2): 378-384. doi: 10.3969/j.issn.0258-2724.20200053

[Abstract](789)

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To analyze the safety of the train under eccentric loads running on a small-radius curve track, its safety indexes are analyzed, on the basis of the longitudinal dynamic model of heavy-haul trains and a 3D dynamic train-track coupling model with short marshaling. First, with the use of the longitudi...

Optimization Model and Algorithm for Train-Set Scheduling Based on Trip Sequence

ZHONG Qingwei, ZHANG Yongxiang, WANG Dian, YIN Yong, YAN Xu, PENG Qiyuan

2021, 56(2): 385-394. doi: 10.3969/j.issn.0258-2724.20191140

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Usually, the train-set schedule involves several practical aspects, such as operational safety, efficiency, and cost. The quality and efficiency of the schedule have a significant impact on the operation of high-speed railways. In order to quickly obtain a high-quality train-set schedule, a mixed-in...

Reliability and Service Quality Evaluation for Urban Rail Transit Network

LIU Jie, CHEN Jinqu, PENG Qiyuan, YIN Yong

2021, 56(2): 395-402, 450. doi: 10.3969/j.issn.0258-2724.20190938

[Abstract](804)

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To evaluate the impact of carrying capacity reductions on the reliability and service quality of an urban rail transit network, firstly, the generalized travel cost before and after capacity reductions was used to determine whether passengers’ travel was reliable. The network reliability was evaluat...

Impact Wear Properties of Hypereutectic Rail Joints Welded by Two Welding Processes

LI Wei, SONG Weijun, DAI An, CHANG Kairong, BAI Wei

2021, 56(2): 403-410. doi: 10.3969/j.issn.0258-2724.20190239

[Abstract](700)

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In order to study the impact damage evolution behavior and the impact performance difference of the hypereutectic rail welding joints welded by flash welding and aluminothermic welding, the impact simulation experiments of the hypereutectoid rail welding seam, the softening part of heat-affected zon...

Fracture Analysis and Failure Mechanism of TA3 Limited Contact-Dynamic Compression Plates

ZHENG Jing, RAO Shaokai, ZHOU Jun, YANG Dan, SHEN Lixin, HUANG Shuhao

2021, 56(2): 411-419. doi: 10.3969/j.issn.0258-2724.20190182

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To investigate the fracture mechanism of TA3 pure titanium limited contact-dynamic compression plates (LC-DCP) during service in the body. 7 clinically fractured TA3 pure titanium LC-DCP were collected and sterilized, and their fracture surfaces were examined using chemical composition analyzer, Vic...

Rapid Identification Method for Lithology of Tunnel Based on Lightweight Model

XIA Yimin, LI Qingyou, DENG Chaohui, LONG Bin, YAO Jie

2021, 56(2): 420-427. doi: 10.3969/j.issn.0258-2724.20191057

[Abstract](642)

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In order to solve the problems of long identification time, low security, and high subjectivity in the existing identification methods of tunnel lithology, given the fact that composition characteristics differ among lithological surfaces, a rapid identification method of tunnel lithology based on t...

Investigation on Thermo-Mechanical Coupling Characteristics of Disc Brake System of High-Speed Train

WANG Dongwei, WU Xiao, XIANG Zaiyu, MO Jiliang

2021, 56(2): 428-436. doi: 10.3969/j.issn.0258-2724.20190879

[Abstract](943)

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To study the effect of thermo-mechanical coupling on the dynamic behavior of high-speed train disc braking system, a three dimensional transient thermo-mechanical coupling finite element model of high-speed train braking system was established, and thermo-mechanical coupling characteristics were cal...

Influence of Sharing Tasks on Automobile Driving Safety and Software Interactive Usability

JING Chunhui, ZHI Jinyi

2021, 56(2): 437-443. doi: 10.3969/j.issn.0258-2724.20200002

[Abstract](451)

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In order to form a theoretical base for the optimization of car sharing software and drivers’ selection, how automobile sharing tasks and driving task affect driving safety and interactive usability is explored. Firstly, 24 experienced Chinese drivers were recruited for driving simulation tests, and...

Cab Signal Denoising Process Based on Fully Convolutional Networks

XING Yulong, WANG Jian, ZHAO Huibing, ZHU Linfu

2021, 56(2): 444-450. doi: 10.3969/j.issn.0258-2724.20191111

[Abstract](611)

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Since cab signals extract information from track circuits as the running token, its decoding performance has a direct impact on the reliability and security of train operation control system. However, as it is inevitable that a lot of noise and interference will mix into the cab signal during operat...

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2021 Vol. 56, No. 2