西南交通大学学报

Experimental Study on Voltage Uniformity of 14.4 kW PEMFC Stack Single Cell

CHEN Weirong, LIU Jiawei, GUO Ai, LI Yan, LIU Zhixiang, ZHANG Xuexia

2017, 30(3): 429-438. doi: 10.3969/j.issn.0258-2724.2017.03.001

[Abstract](768)

Abstract:
Proton exchange membrane fuel cell (PEMFC) stack is superimposed by multi single cells in series. Many factors such as material, process and flow field distribution may lead to the performance degradation of single cells. The service life of the stack depends on the single cell with the lowest volta...

New Algorithm of Wide-Area Protection Based on Current Polarity and Energy Relative Entropy

WU Hao, LI Qunzhan, LIU Wei

2017, 30(3): 439-449. doi: 10.3969/j.issn.0258-2724.2017.03.002

[Abstract](534)

Abstract:
In order to improve the fault tolerance and sensitivity of wide-area relay protection, a new algorithm of wide-area relay protection based on current polarity and energy relative entropy was proposed. It combines bus-bar sampling value protection with differential protection principle for fault comp...

Effects of Contact Strips Wear on Service Performance of Pantograph System

SONG Dongli, JIANG Yanan, ZHANG Weihua

2017, 30(3): 450-457. doi: 10.3969/j.issn.0258-2724.2017.03.003

[Abstract](627)

Abstract:
To realize the parametric description of contact strips wear surface and evaluate the influence of contact strips wear on the service performance of pantograph systems, the effects of contact strips wear on the dynamic and fatigue performance on the pantograph-catenary system were investigated.. Fir...

Characteristics and Suppression Neasures for Soft Flutter of Main Girder with П-Shaped Cross Section

ZHENG Shixiong, GUO Junfeng, ZHU Jinbo, TANG Yu

2017, 30(3): 458-465. doi: 10.3969/j.issn.0258-2724.2017.03.004

[Abstract](609)

Abstract:
Main girder with П-shaped cross section has aerodynamic blunt body structure, and under the nonlinear self-excited force, it is vulnerable to soft flutter. To study the effects of various aerodynamic measures on soft flutter performance of this main girder, the aerodynamic performance of a cable-sta...

In-Situ Measurement and Numerical Simulation of Wave Pressure on Marine Bridge Cofferdam

TI Zilong, LI Yongle, QIN Shunquan, MEI Dapeng

2017, 30(3): 466-473,531. doi: 10.3969/j.issn.0258-2724.2017.03.005

[Abstract](623)

Abstract:
To study the wave pressure distribution on the cofferdam under wave loads, an in-situ measurement and several numerical simulations of the wave pressure on a large-scale steel cofferdam used for construction of a marine bridge were carried out. Through the regular wave simulation of measured signifi...

Element Stiffness Matrix Analysis for Variable Curvature Curved Beam

DONG Changjun, LIU Shizhong, LI Aijun

2017, 30(3): 474-481. doi: 10.3969/j.issn.0258-2724.2017.03.006

[Abstract](686)

Abstract:
Most element stiffness matrixes are implicit functions, and hence are inconvenient to apply directly. To overcome this deficiency, assuming that the shear center of a variable-curvature curved beam coincides with its centroid, an explicit analytical solution formula for flexibility matrix of a kind ...

Experimental Study of Interface Behavior of Geogrids with Different Aperture Shapes

ZHENG Junjie, ZHOU Yanjun, CAO Wenzhao, LAI Hanjiang, YANG Youbin

2017, 30(3): 482-488. doi: 10.3969/j.issn.0258-2724.2017.03.007

[Abstract](620)

Abstract:
In order to investigate the effect of aperture shape on the geogrid-soil interface behavior, tensile tests were conducted using two kinds of geogrids with triangular apertures and rectangular apertures, which are of similar aperture size and mechanical properties. The effect of aperture shape on the...

Joint Reinforcement Design Method of Tieback Anchors on Slope Surface and Anti-Slide Piles at Slope Toe

ZHAO Xiaoyan, HUANG Jinhe, ZHOU Yiwen, LI Yulong, JIANG Chusheng, YUE Zongyu

2017, 30(3): 489-495. doi: 10.3969/j.issn.0258-2724.2017.03.008

[Abstract](656)

Abstract:
In the reinforcement of high and steep slopes, joint uses of tieback anchors of the second-grade and upper-grade slopes and anti-slide piles of the first-grade slope toe are frequent. However, the design method for these combinations remains immature. In this work, a method for optimizing joint rein...

Shaking Table Model Tests for Composite Reinforced Slopes

LI Lihua, REN Zengle, LI Guangxin, XIAO Henglin, YANG Zhiyong, YANG Chao, CUI Feilong

2017, 30(3): 496-504. doi: 10.3969/j.issn.0258-2724.2017.03.009

[Abstract](568)

Abstract:
Waste tires and triaxial geogrids can be used as new reinforcement materials in geotechnical engineering, with merits of excellent mechanical performance, economy and environmental friendliness. Shaking table tests were conducted to study the dynamic performances including distribution of accelerati...

Mechanical Responses of Single-Pressure Arch-Shaped Open Tunnel Structure under Rockfall Impaction

WANG Yusuo, ZHOU Liang, LI Zhenghui, HE Junnan, WANG Tao

2017, 30(3): 505-515. doi: 10.3969/j.issn.0258-2724.2017.03.010

[Abstract](546)

Abstract:
To learn the stress state and provide a design basis for open tunnel structures, the mechanical response of a single-pressure arch-shaped open tunnel structure on a double-line passenger dedicated line is analyzed using dynamic finite element method. Firstly, regarding the vertical drop impaction as...

Structural Features and Engineering Application of Bell-Shaped Mining Caverns in Changyu

YANG Dan, HU Xiewen, SONG Dage, ZHANG Xuan

2017, 30(3): 516-523. doi: 10.3969/j.issn.0258-2724.2017.03.011

[Abstract](585)

Abstract:
Cavern shape and surrounding rock structure are the important factors to cavern stability. In this work, the shape, surrounding rock structure, and rock strength of the deserted bell-shaped caverns without support in Changyu, Wenlin, Zhejiang province were investigated. Then the cavern stability wit...

Failure Mechanism and Shear Capacity of Organic Polymer Shear Connectors

ZHAN Yulin, LI Guifeng, ZHAO Renda, ZOU Zhaoyong, XUE Dengyu

2017, 30(3): 524-531. doi: 10.3969/j.issn.0258-2724.2017.03.012

[Abstract](512)

Abstract:
In order to deal with several weaknesses of metal shear connectors such as original crack, welding residual stress and transfering shear capacity intermittently, the performance of organic polymer shear connectors was introduced to study. Eight sets specimens (total 24 specimens) with different adhe...

Full-Scale Tests on Seismic Behavior of RC Frames Infilled with Hollow Bricks

SU Qiwang, ZHANG Yan, XU Ziyi, CAI Hongru

2017, 30(3): 532-539. doi: 10.3969/j.issn.0258-2724.2017.03.013

[Abstract](628)

Abstract:
In order to study the seismic behavior of RC frames infilled by hollow bricks, full-scale tests of one-story single-bay hollow bricks infilled frame structure and one-story single-bay hollow bricks infilled frame structure with the opening under low cyclic reversed loading were carried out. Then, th...

Bond-Slip Performance of Steel Tubular Composite Piles

ZHANG Min, MA Jianlin, ZHANG Zhengxin, DU Can

2017, 30(3): 540-545,553. doi: 10.3969/j.issn.0258-2724.2017.03.014

[Abstract](542)

Abstract:
To investigate the bond-slip performance of steel tubular composite (STC) piles with shear ring, drilling mud skin and anti-corrosion coating, a new bond-slip constitutive model of the STC piles was proposed assuming an exponential trend of adhesion stress along the length of interface. The correctn...

In-Situ Test on Dynamic Responses of Reinforced Soil Retaining Walls for High-Speed Railways

WU Lianhai, YANG Guangqing, ZHANG Qingbo, SUN Hongwei, ZHANG Liguo, JIAO Ruiling, SU Qian

2017, 30(3): 546-553. doi: 10.3969/j.issn.0258-2724.2017.03.015

[Abstract](619)

Abstract:
In order to study the dynamic responses and mechanism of geogrid reinforced soil retaining wall under the loads of high-speed vehicles, in-situ vibration excitation tests were conducted to obtain distributions of acceleration and dynamic soil pressure in geogrid reinforced soil retaining wall. The d...

Genesis Mechanism and Distribution of Gently-Dipping Brittle Discontinuities in Rock Slope

ZHU Lei, YAN Ming, Huang Runqiu, Gao Feng

2017, 30(3): 554-562. doi: 10.3969/j.issn.0258-2724.2017.03.016

[Abstract](574)

Abstract:
A rock slope in Nujiang River (China) was taken as an example to better understand the distribution of the gently-dipping discontinuities subjected to river incision. Based on field surveys, geological analysis and numerical simulation, a study on the density and evolution of the gently-dipping disc...

Mechanical Behaviours of Typical Asphalt Pavement Structures under Wheel Loads

WU Yu, JIANG Xin, LIANG Xuejiao, FENG Wenqing

2017, 30(3): 563-570. doi: 10.3969/j.issn.0258-2724.2017.03.017

[Abstract](707)

Abstract:
The mechanical behaviours of three typical asphalt pavements including semi-rigid base, inverted and composite asphalt pavement under wheel loads were analyzed and compared based on the tests on the asphalt pavement test section constructed in Chengdu-Deyang-Nanchong expressway. Comparing with stati...

Seismic Dynamic Response and Instability Mechanism of Slopes in Nyingchi-Bome Section of G318 Highway, Tibet

WU Xiaofei, WANG Ying, YE Tangjin, YANG Zhong, JIANG Yu

2017, 30(3): 571-577. doi: 10.3969/j.issn.0258-2724.2017.03.018

[Abstract](592)

Abstract:
Strata structures and dynamic responses of slopes are significant factors in slope failures. In order to elucidate the dynamic response differences and dynamic response patterns of slopes with different stratum structures, a numerical simulation model of slope with Kobe seismic wave is established i...

Topology Optimization of Heat Conduction Structures Based on Probabilistic and Non-probabilistic Hybrid Reliability

YOU Fang, CHEN Jianjun, LIN Feng, CAO Hongjun

2017, 30(3): 578-583,599. doi: 10.3969/j.issn.0258-2724.2017.03.019

[Abstract](593)

Abstract:
Topology optimization design of heat conduction structures with interval variables and random variables was studied. Firstly, structural physical parameters and applied loads were regarded as interval variables and random variables. The probabilistic reliability and the non-probabilistic reliability...

DEM Co-registration Algorithm Based on Gauss-Newton Method

ZHANG Tonggang, WANG Kunlun, JIN Guoqing

2017, 30(3): 584-592. doi: 10.3969/j.issn.0258-2724.2017.03.020

[Abstract](693)

Abstract:
To improve the efficiency of DEM (digital elevation model) co-registration, a fast algorithm based on Gauss-Newton method was proposed. This algorithm uses Gauss-Newton method instead of the least squares method, to solve the objective equation of the DEM co-registration model, and greatly accelerat...

Clock Synchronization Algorithm Based on Particle Swarm Optimization with Natural Selection

JIANG Yilin, ZHANG Fangyuan

2017, 30(3): 593-599. doi: 10.3969/j.issn.0258-2724.2017.03.021

[Abstract](553)

Abstract:
In order to improve the clock synchronization accuracy of wireless sensor network (WSN) and avoid the synchronization error caused by the unreliable data and the change of the network topology structure in the synchronization process, a simulation model of particle swarm optimization (PSO) algorithm...

Information Estimation on Wheelset State and Track Features of Railway Vehicles

SUN Xiaojie, YANG Junqi

2017, 30(3): 600-606. doi: 10.3969/j.issn.0258-2724.2017.03.022

[Abstract](515)

Abstract:
In order to get the wheelset state and track feature used for rail vehicle wheelset active control in an easy and economical way, an information estimation scheme based on state observers is proposed to simultaneously estimate the wheelset state and unknown track feature. The scheme obtains wheelset...

Coupled Thermo-Elastic Deformation of Swing Movable Teeth Transmission

LIANG Shangming, LI Lei

2017, 30(3): 607-611. doi: 10.3969/j.issn.0258-2724.2017.03.023

[Abstract](506)

Abstract:
To improve the transmission performance of swing movable teeth transmission, the contact heat transfer process between the movable teeth and internal gear was analyzed and the calculation method of the friction heat flux generated by the meshing pair was proposed according to the meshing principle o...

Technological Experiment and Regression Analysis of Surface Residual Stress in Ultrasonic Grinding

HE Yuhui, ZHOU Jianjie, ZHOU Qun, TANG Chu, WAN Rongqiao, TANG Jinyuan

2017, 30(3): 612-617. doi: 10.3969/j.issn.0258-2724.2017.03.024

[Abstract](507)

Abstract:
In order to explore the process features of ultrasonic grinding, an experimental investigation was conducted on 45 steel using a self-developed axial ultrasonic grinding apparatus, and the surface residual stress of workpieces was measured using an iXRD residual stress analyzer. Based on the experim...

Backstepping Control of Attitude Adjustment Servo Platform Based on LS_SVM

HUANG Xiaorong, GAO Hongli, MAO Run, LI Shichao, WEN Juan

2017, 30(3): 618-625. doi: 10.3969/j.issn.0258-2724.2017.03.025

[Abstract](534)

Abstract:
To improve the performance of high-precision servo systems with compound disturbance problem, two least squares support vector machine (LS_SVM) systems were employed to approximate the compound disturbance of the high precision servo systems. The kernel functions and regularization parameters of LS_...

Design of Vehicle Acceleration Controller Based on Parallel Neural Network PID

LIANG Jun, ZHAO Tongyang, XIONG Xiaoxia, ZHANG Wanwan, CHEN Long, ZHU Ning

2017, 30(3): 626-632. doi: 10.3969/j.issn.0258-2724.2017.03.026

[Abstract](560)

Abstract:
An acceleration control algorithm based on the parallel neural network PID (PNNPID) was proposed to conquer the problems of slow system change identification, poor dynamic performance, and slow adjustment in traditional acceleration control algorithms for adaptive cruise control (ACC). Through analy...

High-Efficient Preparation of SmBiO3 Buffer Layer for Superconducting Coated Conductors

ZHU Xiaolei, PU Minghua, ZHANG Hong, ZHAO Yong

2017, 30(3): 633-638. doi: 10.3969/j.issn.0258-2724.2017.03.027

[Abstract](485)

Abstract:
In order to shorten the preparation period of buffer layer for high-performance coated conductors, SmBiO3 (SBO) buffer films were efficiently deposited on surface-oxidation epitaxy processed NiO(100)/NiW substrates by chemical solution deposition (CSD) method, using a precursor solution prepared by ...

Analysis of Route Choice Behavior of Urban Rail Passengers Considering Transfer Thresholds

YAO Enjian, JIN Fanglei, HU Qianwen, ZHANG Yongsheng, YANG Yang

2017, 30(3): 639-645. doi: 10.3969/j.issn.0258-2724.2017.03.028

[Abstract](637)

Abstract:
In order to investigate the route choice behavior differences of commuters and non-commuters due to different time constraints, the disaggregate theory is employed to construct a route choice model. First, the concept of transfer threshold is proposed, which attempts to analyze the difference of pen...

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2017 Vol. 30, No. 3