西南交通大学学报

Aeolian Vibration Characteristics of Electrified High-Speed Railway Catenary

LIU Zhigang, SONG Yang, LIU Yucheng

2015, 28(1): 1-6. doi: 10.3969/j.issn.0258-2724.2015.01.001

[Abstract](1121)

Abstract:
In order to evaluate the influence of the aeolian vibration on catenaries in operation and calculate their amplitudes under different wind speeds, a formula of catenary aeolian vibration in the vertical direction was deduced based on the modal analysis method. By solving the vibration dynamic equati...

Recognizing Running State of High-Speed Trains Based on Multifractal Theory and SVM

SUN Yongkui, YU Zhibin, JIN Weidong

2015, 28(1): 7-12. doi: 10.3969/j.issn.0258-2724.2015.01.002

[Abstract](1167)

Abstract:
In order to evaluate in-service performances of high-speed trains, a novel approach to recognize the running state of high-speed trains was proposed using the multifractal theory and the support vector machine (SVM). The relationship between the multifractal spectrum parameters and the train running...

Analysis of Digital Voltage-Mode Controlled Buck Converter with Dual-Edge Constant on-Time Modulation

ZHOU Guohua, CHEN Xing, CUI Hengfeng

2015, 28(1): 13-19,35. doi: 10.3969/j.issn.0258-2724.2015.01.003

[Abstract](1327)

Abstract:
To improve the accuracy of output regulation in a switching converter with constant on-time (COT) modulation, dual-edge constant-on time (DCOT) modulation scheme for the switching converter in continuous conduction mode was proposed, based on the characteristics of COT modulation and dual-edge pulse...

Research on the Control Strategy of Power System for Hybrid Electric Train

YANG Jibin, ZHANG Jiye, SONG Pengyun, CHEN Yanqiu

2015, 28(1): 20-26. doi: 10.3969/j.issn.0258-2724.2015.01.004

[Abstract](1031)

Abstract:
In order to achieve a numerical simulation of hybrid electric trains, a mathematical model and a control strategy for the hybrid power system were proposed. By analyzing the coupling relationship between the hybrid power system and longitudinal dynamic system of a train, an algorithm based on the pr...

Modeling and Verification of TSSM-Based CBTC Zone Controller for Urban Rail Transit

LI Yao, CHEN Rongwu, GUO Jin, KONG Lingjing, ZHOU Zheng

2015, 28(1): 27-35. doi: 10.3969/j.issn.0258-2724.2015.01.005

[Abstract](1246)

Abstract:
As a safe state machine lacks time property, a TSSM (timed safe state machine) modeling method was presented based on the synchronous design method of reactive system. The weak transition and synchronized transition were defined, and the ZC (zone controller) system model for urban rail transit was e...

Optimization and Design of Maglev System PID Controller Based on Particle Swarm Optimization Algorithm

SONG Rongrong, CHEN Zili

2015, 28(1): 36-43. doi: 10.3969/j.issn.0258-2724.2015.01.006

[Abstract](1103)

Abstract:
In order to improve the nonlinear and unstable characteristics of maglev systems, two nonlinear subsystems with different structures were transformed into linear ones with the same structure by differential geometry method, and then a PID controller that is based on the standard particle swarm optim...

Temperature Control of High-Power Self-Humidifying PEMFC with Air Cooling

YOU Zhiyu, CHENG Weirong, PENG Yun, LI Qi

2015, 28(1): 44-50. doi: 10.3969/j.issn.0258-2724.2015.01.007

[Abstract](1228)

Abstract:
To study the influence of temperature control on the stack output performance of high-power self-humidifying proton exchange membrane fuel cell (PEMFC) with air cooling, four control methods including fuzzy control, PID control, fuzzy-PID switching control, and adaptive fuzzy PID control are employe...

A DV-HOP Localization Algorithm Against Wormhole Attacks in WSN

DENG Ping, ZHANG Hongjiang

2015, 28(1): 51-57,65. doi: 10.3969/j.issn.0258-2724.2015.01.008

[Abstract](1168)

Abstract:
In order to resist wormhole attacks and improve localization performance, a secure neighbor discovery based DV-HOP(NDDV) algorithm was proposed. Based on the abnormal hop number in the network node communication when wormhole attack occurs, NDDV can detect two kinds of wormhole links according to th...

Optimal Energy-Efficient Path Selection Scheme in OFDM-based DF Relay Networks

HUANG Gaoyong, FANG Xuming, CHEN Yu, ZHANG Qiangfeng

2015, 28(1): 58-65. doi: 10.3969/j.issn.0258-2724.2015.01.009

[Abstract](1078)

Abstract:
Based on a three-node orthogonal frequency division multiplexing (OFDM)-based relay transmission network and decode-and-forward (DF) relaying strategy, an optimal energy-efficient path selection scheme was proposed. By converting the fading values of both the relay and direct links into the equivale...

Optimization and Performance Analysis for Bandwidth Spectrum Sensing in Cognitive Radio

LIU Xin, ZHONG Weizhi

2015, 28(1): 66-71. doi: 10.3969/j.issn.0258-2724.2015.01.010

[Abstract](986)

Abstract:
To decrease interference to primary user (PU) in cognitive radio (CR), a bandwidth spectrum sensing model of secondary user (SU) over the whole frame was built through dividing the communication bandwidth into sensing frequency band and transmission frequency band, according to the status variation ...

Design of Solid State Modulator Coupled with Pulse Transformer of High-Turns Ratio

WANG Qingfeng, LIU Qingxiang, ZHANG Zhengquan, LI Xiangqiang

2015, 28(1): 72-76. doi: 10.3969/j.issn.0258-2724.2015.01.011

[Abstract](1256)

Abstract:
To improve the reliability and stability of solid-state modulator and avoid the plight that the semiconductor switch in series requires the voltage sharing and signal synchronization, a solid-state hard-tube modulator coupled with pulse transformer of high turns ratio was designed and its topology s...

Experimental Study on Evolution of Wear Mechanism of Contact Strip with Electric Current

YANG Hongjuan, HU Yan, CHEN Guangxiong

2015, 28(1): 77-83. doi: 10.3969/j.issn.0258-2724.2015.01.012

[Abstract](1169)

Abstract:
In order to investigate the friction and wear behavior of the high-speed pantagraph-caternary system, a high speed ring-block wear tester was used to study the wear characteristics of carbon contact strip and the arc discharge phenomenon between the copper alloy contact wire and the carbon contact s...

Long-Term Load Spectrum Test of High-Speed Train Bogie

WANG Wenjing, WANG Yan, SUN Shouguang, LIANG Shulin

2015, 28(1): 84-89. doi: 10.3969/j.issn.0258-2724.2015.01.013

[Abstract](1356)

Abstract:
In order to establish the load spectra for high speed train bogies,a long-term on-track test of high speed train bogie loads was carried out on Wuhan-Guangzhou passenger dedicated line. The vertical load of axlebox spring and the lateral load of axlebox arm within a wheel profiling cycle were measur...

Influence of Rotational Inertia Errors on Simulation Results of Vehicle Collision Model

ZHANG Jian, ZHANG Xin, GAO Jingui, LI Jiang

2015, 28(1): 90-96. doi: 10.3969/j.issn.0258-2724.2015.01.014

[Abstract](1039)

Abstract:
To control effectively the influence of rotational inertia errors in the vehicle collision model on the simulation results, the influence rules were analyzed by perturbation theory. The influence degrees were investigated using the average slope of the pre-impact vehicle speed curve, the pre-impact ...

Review and Prospects on Constructing Technologies of Metro Tunnels Using Shield Tunnelling Method

HE Chuan, FENG Kun, FANG Yong

2015, 28(1): 97-109. doi: 10.3969/j.issn.0258-2724.2015.01.015

[Abstract](2445)

Abstract:
With the rapid development of metros in China, shield Tunnelling method, which is considered as a safe, environmental and quick construction method, has been widely applied in metro tunnel construction, and gradually become a hotspot in the world. In this paper, through review of the state-of-the-ar...

Application of Flexible Shed-Tunnel Structure to Rock-Fall Hazard Prevention

LIU Chengqing, CHEN Linya, CHEN Chi, LI Junjun, ZHAO Shichun

2015, 28(1): 110-117. doi: 10.3969/j.issn.0258-2724.2015.01.016

[Abstract](1829)

Abstract:
To deal with the lack of research and design basis of flexible shed-tunnel structures, different types of protective structures for rock-fall hazards prevention and control were compared, according to the feature of widely distributed and concentrated mass of rock-fall hazards during traffic constru...

Influence of Inertial Effect of Compression Wave on Waveform Evolution

WANG Honglin, LEI Bo, BI Haiquan

2015, 28(1): 118-123. doi: 10.3969/j.issn.0258-2724.2015.01.017

[Abstract](930)

Abstract:
In order to accurately assess the micro-pressure wave outside tunnel exits, a theoretical formula of pressure gradient of wavefronts was deduced based on the one-dimensional plane wave equation and the flow characteristics of compression wave. The effects of propagation distance, and the amplitude a...

Effects of Structural Quasi-static Components on Seismic Responses of Train-Track-Bridge System

LEI Hujun, LI Xiaozhen

2015, 28(1): 124-130,136. doi: 10.3969/j.issn.0258-2724.2015.01.018

[Abstract](1551)

Abstract:
In order to discuss the effects of structural quasi-static components on the running safety of a train running over a high-speed railway bridge subjected to earthquake action, two dynamic models for a train-track-bridge system subjected to seismic excitation were set up by considering the seismic fo...

Iterative Algorithm of HSR Ballastless Track Realignment Calculation Based on MCO Model

WEI Hui, ZHU Hongtao, ZHAO Guotang, WAN Jian, WANG Zhiyong

2015, 28(1): 131-136. doi: 10.3969/j.issn.0258-2724.2015.01.019

[Abstract](1285)

Abstract:
To avoid the over-reliance on measuring track outer geometry for ballastless track fine adjustment, a computing method of track realignment on the basis of track irregularities was proposed. Through establishing the vector models of track irregularities based on the inertia trajectory of track inspe...

Numerical Analysis of Static Crushed Behavior of Railway Ballast

ZHANG Xu, ZHAO Chunfa, ZHAI Wanming

2015, 28(1): 137-143. doi: 10.3969/j.issn.0258-2724.2015.01.020

[Abstract](1109)

Abstract:
In order to reveal the static compressive behavior and breakage mechanism of railway ballast, the discrete element method was applied to simulate its crushed behavior under statically loading between two flat platens. A laser scanner was used to obtain the three dimensional morphology of a ballast. ...

Triaxial CT Tests of Meso-Structure Evolution of Remodeled Cohesive Soil in Hefei

ZHU Baolong, WU Xiyong, LI Xiaoning, WEI Jiuping

2015, 28(1): 144-149. doi: 10.3969/j.issn.0258-2724.2015.01.021

[Abstract](982)

Abstract:
In order to investigate the meso-structure characteristic of unsaturated cohesive soil, unsaturated consolidated-drained triaxial shear tests for remodeled cohesive soil in Heifei were carried out under different suctions and net confining pressures with CT (computed tomography) multi-function triax...

Lateral Deformation of Cellular Diaphragm Wall at Excavation Stage

LIANG Sejia, XU Wei, CHEN Yu

2015, 28(1): 150-155,172. doi: 10.3969/j.issn.0258-2724.2015.01.022

[Abstract](1255)

Abstract:
To get the general rules of stress and deformation of cellular diaphragm wall, a centrifugal model test and field monitoring were made to analyze the lateral deformation rule, effects of design parameters on wall deformation, and relationship between maximum lateral displacement and excavation depth...

Determination Method of Slip Surface of Reinforced Soil Slope Subjected to Seismic Load

JIANG Wei, SU Qian, ZHANG Xiaoxi, ZHOU Heng

2015, 28(1): 156-160. doi: 10.3969/j.issn.0258-2724.2015.01.023

[Abstract](1105)

Abstract:
In order to reasonably determinate the position of slip surface of a reinforced soil slope, a method, a horizontal slice method, was proposed for reinforced soil slopes subjected to seismic loads on the basis of the limit equilibrium theory. In this method, the slip surface is assumed to be a compos...

Aerial Image Registration Based on Bayesian Decision Theory

ZHANG Shuaiyi, LI Yongshu, CAI Guolin

2015, 28(1): 161-166. doi: 10.3969/j.issn.0258-2724.2015.01.024

[Abstract](1009)

Abstract:
To eliminate the influence of projection difference on aerial image registration in object monitoring, a new image registration method was proposed based on Bayesian decision theory. Distribution rule of projection difference was derived and its impact on image registration was analyzed. A large num...

Spatio-Temporal Meeting Analysis of Vehicles Based on Floating Car Data

SHEN Jingwei, ZHANG Hongtao, ZHOU Tinggang

2015, 28(1): 167-172. doi: 10.3969/j.issn.0258-2724.2015.01.025

[Abstract](1210)

Abstract:
In order to investigate the spatial-temporal relationships of discrete spatial-temporal data, spatio-temporal trajectory was taken as a link, and an analysis method for spatio-temporal meeting of vehicles based on FCD (floating car data) was proposed. The map matching method was used to spatially in...

Traffic Assignment Model Based on Cumulative Prospect Theory for Stochastic Road Network with Heterogeneous Users

LÜ, Biao, LIU Haixu, PU Yun, WANG Keming, GUO Qian

2015, 28(1): 173-182. doi: 10.3969/j.issn.0258-2724.2015.01.026

[Abstract](1306)

Abstract:
Due to travelers' bounded rationality and their differences of risk taking behaviors in route choice, the travelers were divided into four types, who respectively adopted travel time budget (travel time reliability being less than 50%), expected travel time, travel time budget (travel time reliabili...

Speeding Behavior Analysis Based on Structural Equation Model

YANG Jingshuai

2015, 28(1): 183-188. doi: 10.3969/j.issn.0258-2724.2015.01.027

[Abstract](1212)

Abstract:
In order to identify and quantify the causal relationships between drives' compliance with speed limit signs or warning messages and its associated factors in different traffic conditions, the data of 534 driver questionnaire surveys were analyzed by exploratory factor analysis and structural equati...

Congestion Identification of Crossing Air Routes Based on Gray Clustering Method

LI Shanmei, XU Xiaohao, WANG Chao, WANG Fei

2015, 28(1): 189-197. doi: 10.3969/j.issn.0258-2724.2015.01.028

[Abstract](1178)

Abstract:
In order to reduce the cognitive load of air traffic managers for congestion of crossing air routes, the limitations of the congestion identification measurements was analyzed. According to the formation process of traffic congestion, a definition of crossing air routes congestion based on flying in...

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2015 Vol. 28, No. 1