西南交通大学学报

Dynamic Performance Analysis and Design of Fuel Cell Hybrid Locomotive

CHEN Weirong, ZHANG Guorui, MENG Xiang, BU Qingyuan, LI Qi

2017, 30(1): 1-8. doi: 10.3969/j.issn.0258-2724.2017.01.001

[Abstract](774)

Abstract:
Fuel cells (FCs) for hybrid locomotives have slow dynamic responses and soft output characteristics, and are incapable of recovering regenerative energy in the braking process. In order to cope with these issues and improve the dynamic and economic performance of FC hybrid locomotives, a locomotive ...

Frequency-Domain Dielectric Spectroscopy Characteristics of Generator Epoxy/Mica Insulation

GAO Bo, HAO Changjin, LI Shuaibing, YIN Xiaobing, YU Xiaofeng, WU Guangning

2017, 30(1): 9-15. doi: 10.3969/j.issn.0258-2724.2017.01.002

[Abstract](613)

Abstract:
To apply frequency domain dielectric spectroscopy technology (FDS) to the non-destructive diagnosis of epoxy/mica insulation, a generator winding bar sample was given an accelerated multi-stress aging treatment by combined use of thermal, electrical, and mechanical (vibration) aging methods, and its...

Fatigue Life Prediction on Rib-to-Deck Welded Joints of Steel Bridge Deck Based on LEFM

WEI Xing, JIANG Su

2017, 30(1): 16-22. doi: 10.3969/j.issn.0258-2724.2017.01.003

[Abstract](608)

Abstract:
In order to explore the fatigue performance of U-shaped rib-to-deck welded joints of orthotropic steel bridge deck under cyclic loading, based on linear elastic fracture mechanics (LEFM), fatigue life evaluation was carried out using finite element method (FEM). According to the structure features o...

Fragility Analysis of Large-Span Continuous Rigid Bridge Considering Wave Passage Effectt

CHEN Zhiwei, PU Qianhui, LI Xi, CHEN Zhiqiang, JIA Hongyu

2017, 30(1): 23-29,37. doi: 10.3969/j.issn.0258-2724.2017.01.004

[Abstract](651)

Abstract:
To study wave passage effect on the fragility of the large-span continuous rigid bridge (LSCRB) in mountainous area, an actual LSCRB in southwest area was chosen as the study object. Twenty earthquake records were selected using the spectra-compatible method. Then, incremental dynamic analysis (IDA)...

Experimental Research on Deformation Characteristics of Piled Raft Foundation under Flexible Load

SHAO Guoxia, SU Qian, CHEN Shangyong, BAI Hao, WANG Wubin

2017, 30(1): 30-37. doi: 10.3969/j.issn.0258-2724.2017.01.005

[Abstract](623)

Abstract:
To study the pile-raft foundation in thick soft clay ground, total settlements of foundation surface, layered settlements, lateral deformations, and pore water pressures of foundation soil for pile-raft foundation and natural foundation were observed and analyzed by long-time in-situ test. The load ...

Deformation and Mechanical Performance of Buried HDPE Pipes Reinforced by Geogrids

XIAO Chengzhi, WANG Jiayong, YANG Yaxin, ZHOU Xia

2017, 30(1): 38-44,68. doi: 10.3969/j.issn.0258-2724.2017.01.006

[Abstract](622)

Abstract:
To analyze load reduction performance of buried pipes reinforced by geogrids, the influence of embedment depth of the uppermost geogrid, length of geogrid, geogrid layers, sand surrounding buried pipes and buried depth of pipes on the deformation and mechanism of pipes was studied through static loa...

Performance-Based Experiment Research on Three-Story Concrete-filled Steel Tubular Frame

WEN Yang, MENG Chuncai, GUO Hongling

2017, 30(1): 45-53. doi: 10.3969/j.issn.0258-2724.2017.01.007

[Abstract](586)

Abstract:
To study the seismic performance of concrete-filled steel tubular(CFST) frame structure, the quasi-static test on a three-story frame structure consisting of square CFST column and rectangular CFST beam was carried out. The hysteretic behavior, ductility, bearing capacity, stiffness degradation, ene...

Calculation of Internal Humidity Field of Concrete Based on ANSYS

WANG Yongbao, JIA Yi, ZHAO Renda

2017, 30(1): 54-60. doi: 10.3969/j.issn.0258-2724.2017.01.008

[Abstract](689)

Abstract:
In order to calculate the humidity field of concrete using the temperature field module in finite element program, a comparison between thermal field and humidity field was made of their differences in the differential equations, initial and boundary conditions, etc. Based on the temperature field m...

Effect of Admixtures on Tensile Behavior of Fiber Reinforced Cementitious Composites

WANG Hailong, LUO Yuejing, PENG Guangyu, SUN Xiaoyan, YING Qiming

2017, 30(1): 61-68. doi: 10.3969/j.issn.0258-2724.2017.01.009

[Abstract](525)

Abstract:
To reduce the material cost and understand the modification effects of admixtures on the tensile properties of polyvinyl alcohol fiber-reinforced engineered cementitious composites (PVA-ECCs), PVA-ECCs were prepared with different mass percentages of silica fume(SF), fly ash(FA) and metakaolin (MK) ...

Morphology of Limestone Manufactured Sand Based on Image Processing Technology

ZENG Xiaohui, DAI Yapeng, QU Fulin, YE Yuezhong, XUE Yuan, WANG Zhimeng, ZHENG Yongfei

2017, 30(1): 69-74. doi: 10.3969/j.issn.0258-2724.2017.01.010

[Abstract](561)

Abstract:
To quantitatively study the morphological characteristics and regularity of limestone manufactured sand with different particle sizes, digital images of 6 size fractions in total, 4.750-2.360, 2.360-1.180, 1.180-0.600, 0.600-0.300, 0.300-0.150 mm and 0.150-0.075 mm (sample size of each size fraction...

Crack Propagation Law of Segment Tendon under Jacking Forces

LU Daiyue, HE Chuan, WANG Shimin

2017, 30(1): 75-82. doi: 10.3969/j.issn.0258-2724.2017.01.011

[Abstract](564)

Abstract:
To explore the cracking and local damage of tenon segment that easily occurs during the construction of shield-driven tunnels, a model of standard tenon segment was built using the extend finite element method (XFEM) with ABAQUS. The initiation location, propagation direction and distribution of seg...

Experimental Study of Spectral Characteristics of Fluctuating Wind Loads on High-Rise Building with Rectangular Section

ZENG Jiadong, LI Mingshui

2017, 30(1): 83-90. doi: 10.3969/j.issn.0258-2724.2017.01.012

[Abstract](626)

Abstract:
In order to study the effects of wind field characteristics and side ratio of rectangular section on the spectral characteristics of fluctuating wind loads for rectangular high-rise buildings, the pressure fluctuations on a stationary rigid model with cross configurations of 1:2 and 2:1 were measure...

New Methodology for Stability Analysis on Repeated Measurement of CPⅢ Vertical Control Network

LIU Chenglong, LIU Zhujun, YANG Xuefeng, LIU Zhi

2017, 30(1): 91-97. doi: 10.3969/j.issn.0258-2724.2017.01.013

[Abstract](634)

Abstract:
In the current code on the stability analysis of repeated measurements for the CPⅢ vertical control network of high-speed railways, the divergence tolerance of elevation between original and repeated measurements should be no more than 2 mm, which is not reasonable due to misjudging stable points. B...

Effect of Regional Distribution and Degradation of Ballast Resistance on Longitudinal Force of Rail

LIU Hao, XIE Kaize, WANG Ping, XIAO Jieling, CHEN Rong

2017, 30(1): 98-105. doi: 10.3969/j.issn.0258-2724.2017.01.014

[Abstract](602)

Abstract:
In order to explore the effect of ballast resistance evolution on the mechanical behavior of the continuously welded rail (CWR) on bridge, tests were conducted for the longitudinal and lateral ballast resistances on bridge and roadbed sections. Taking an example of an extra-large double-line continu...

Effect of Rolling Direction Reversal on Friction and Wear Behavior of Wheel Steel

ZHANG Mingyuan, LU Liantao, ZENG Dongfang, CHEN Gang, ZHANG Jiwang

2017, 30(1): 106-111,126. doi: 10.3969/j.issn.0258-2724.2017.01.015

[Abstract](487)

Abstract:
In order to improve the wear resistance of wheel steel in rolling contact conditions, friction and wear tests were conducted on a rolling-sliding wear test machine to measure the friction coefficients and wear rates of wheel specimens before and after their rolling direction reversal (RDR) at the tr...

Influence of Wheelset Structure and Fastener Stiffness on Rail Corrugation

CUI Xiaolu, CHEN Guangxiong, YANG Hongguang

2017, 30(1): 112-117. doi: 10.3969/j.issn.0258-2724.2017.01.016

[Abstract](650)

Abstract:
In order to study the formation mechanism and influence factors of rail corrugations on a sharp curved track of metro line, a finite element model for a wheelset-track system on a sharp curved track, which consists of a power wheelset, two rails and a series of sleepers, is established from the view...

Design of Magnetic Levitation Controller and Static Stability Analysis

WANG Keren, LUO Shihui, ZHANG Jiye

2017, 30(1): 118-126. doi: 10.3969/j.issn.0258-2724.2017.01.017

[Abstract](788)

Abstract:
In order to realize the stable suspension of the maglev train in the condition of low track beam stiffness, and reduce construction cost of track beam, a electromagnet-elastic-track-carbody model was established based on Newton's second law. Firstly, the vibration information of electromagnet, track...

Simulation of Airbag Ejection Acceleration Process on a Train Collision Testbed

LIU Zhongbin, XIAO Shoune, LUO Shihui

2017, 30(1): 127-132. doi: 10.3969/j.issn.0258-2724.2017.01.018

[Abstract](583)

Abstract:
To solve the driving problem with great energy for a train collision testbed, the airbag with a self-growth variable boundary was proposed. The airbag with high-pressure gas can work effectively in a long distance under the condition of constraint and un-blasting. Based on the control volume method,...

Generalized Multi-step Explicit Integration Method in Structural Dynamics

YANG Chao, ZHU Tao, YANG Bing, YANG Guangwu, LU Liantao, XIAO Shoune

2017, 30(1): 133-140. doi: 10.3969/j.issn.0258-2724.2017.01.019

[Abstract](574)

Abstract:
In order to develop new time integration algorithms, a generalized multi-step explicit integration method (GMEM) was proposed by means of weighting independent variables, accelerations. Firstly, a general integration format was provided based on the acceleration explicit method. Furthermore, the sta...

Abrasion Process Modeling of Abrasive Belt Grinding in Rail Maintenance

WANG Wenxi, LI Jianyong, FAN Wengang, HE Zhe

2017, 30(1): 141-147. doi: 10.3969/j.issn.0258-2724.2017.01.020

[Abstract](575)

Abstract:
Considering the contact area state under elastic contact of curved surfaces, an abrasive belt wear process model for rail grinding was established using the Archard equation and Heltzian contact theory to investigate the influence of technological parameters on the belt service life. The curves of w...

OFDM based DFT Scrambling Vector Code Division Multiple Access

ZHOU Gao, FAN Pingzhi, HAO Li

2017, 30(1): 148-155. doi: 10.3969/j.issn.0258-2724.2017.01.021

[Abstract](449)

Abstract:
Channel spectral nulls (or deep fades) on some sub-carriers will degrade the performance of multiple access systems based on multiple access OFDM. To improve the performance, a novel DFT scrambling vector multi-carrier DS-CDMA was proposed based on the theory of matrix permutation. Using the decompo...

Self-Recovery E-evidence Image Watermarking Algorithm Based on Binary features of Important Blocks

YIN Bangxu, CHEN Fan, WEI Wei, WANG Hongxia

2017, 30(1): 156-163,208. doi: 10.3969/j.issn.0258-2724.2017.01.022

[Abstract](528)

Abstract:
Existing self-recovery watermarking algorithms are generally designed for natural images, which have a large watermark embedding capacity and cannot clearly recover the text information. To deal with this, a self-recovery watermarking algorithm for E-evidence image authentication was proposed, which...

Algorithm for Reconstructing Polyhedral Objects from Single Axonometric Line Drawing Based on Rotation Transformation

TIAN Huaiwen, GUO Shizhang, YANG Ningxue

2017, 30(1): 164-170. doi: 10.3969/j.issn.0258-2724.2017.01.023

[Abstract](533)

Abstract:
The divide-and-conquer strategy is adopted to improve the efficiency of 3D reconstruction of a single line drawing and guarantee the convergence of the optimization algorithm for polyhedral objects. First, the single line drawing is divided into a lot of closed polygons, then all closed polygons are...

Research on Nonlinear Characteristics of Air Traffic Flows on Converging Air Routes

WANG Chao, ZHENG Xufang, WANG Lei

2017, 30(1): 171-178. doi: 10.3969/j.issn.0258-2724.2017.01.024

[Abstract](672)

Abstract:
Insights into the temporal and spatial characteristics of air traffic flow is the prerequisite of air traffic flow simulation, prediction and control. Nonlinear characteristics of traffic flow time series on converging air routes were explored from the chaotic and fractal views. First, a traffic flo...

Collaborative Aircrafts Scheduling Strategy in Metroplex Terminal Area Based on FS-MOPSO

WANG Zhan, WU Yi

2017, 30(1): 179-185. doi: 10.3969/j.issn.0258-2724.2017.01.025

[Abstract](598)

Abstract:
To solve the collaborative scheduling problem for arrival aircrafts in metroplex terminals, a discrete optimization model was proposed under ration-by-schedule (RBS). The model focuses on improving scheduling fairness between airlines based on collaborative decision-making (CDM) to seek a best sched...

Rutting Behavior of Flexible Pavement in Airport Turning Area under Temperature Field

CAI Jing, LI Yue, SUN Qingang

2017, 30(1): 186-194. doi: 10.3969/j.issn.0258-2724.2017.01.026

[Abstract](554)

Abstract:
Since the lateral shearing effect of aircraft wheels during low-speed turning may aggravate the rutting defects of flexible pavement and jeopardize the driving safety, a numerical analysis model of flexible pavement structure coupled with a continuous alternating temperature field was established on...

Integrated Navigation Grid Model and Its Applications in Smart Tourism Routing

ZHU Qing, WANG Yeping, ZHANG Junxiao, CHEN Chongtai, CAO Zhenyu

2017, 30(1): 195-201. doi: 10.3969/j.issn.0258-2724.2017.01.027

[Abstract](517)

Abstract:
Aiming at the personalized navigation requirements of the tourists in complex scenic environments, an integrated navigation grid model is proposed to comprehensively represent the tourist preference and multidimensional dynamic environmental factors like the terrain, weather, tourist behaviors and r...

GBSAR Atmospheric Turbulence Calibration Based on Weighted Stable Points

HUANG Qihuan, YUE Jianping

2017, 30(1): 202-208. doi: 10.3969/j.issn.0258-2724.2017.01.028

[Abstract](555)

Abstract:
Atmospheric disturbance is one of the key factors affecting the accuracy of ground based synthetic aperture radar (GBSAR) interferometry for deformation monitoring. Considering the correlation of atmosphere delay with azimuth direction, a new GBSAR atmospheric turbulence calibration method based on ...

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2017 Vol. 30, No. 1