西南交通大学学报

Design Methods for Motion Stability of High-Speed Trains

ZHANG Weihua, LI Yan, SONG Dongli

2013, 26(1): 1-9. doi: 10.3969/j.issn.0258-2724.2013.01.001

[Abstract](1766)

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Abstract:
A strategy to control the hunting instability of railway vehicles, which is based on analysis of the effects of vehicle structure characteristics and system parameters on motion stability of high-speed trains, is developed and then validated by parameter sensitivity analysis. Then, the principle for...

Sliding Mode Semi-active Control for High-Speed Pantograph

YANG Gang, LI Fu

2013, 26(1): 10-15. doi: 10.3969/j.issn.0258-2724.2013.01.002

[Abstract](1432)

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In order to study the effects of active and semi-active technologies on pantograph performances, dynamic models for sliding mode active and semi-active control of pantographs are established. Based on the models, dynamic performances of the high-speed pantograph-catenary system under passive control...

Study on Minimum Curve Radius of High-Speed Railway Besed on Dynamics Analysis

YI Sirong, NIE Liangtao, QIN Fangfang

2013, 26(1): 16-20,35. doi: 10.3969/j.issn.0258-2724.2013.01.003

[Abstract](1670)

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The minimum curve radius is one of the main standards of high-speed railway, and it is a major influencing factor for train running. A method of calculating curve radius of high-speed railway based on the best train-line dynamic characteristics was introduced. Based on the dynamic simulation method,...

Time-Domain Analysis of Galloping of Main Cables of Suspension Bridge during Erection Process

LI Yongle, YI Renyan, WANG Dongxu, LIAO Haili

2013, 26(1): 21-28. doi: 10.3969/j.issn.0258-2724.2013.01.004

[Abstract](1371)

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In order to analyze the galloping instabilities of main cables, the quasi-steady aerodynamic force formula was derived in a body axial coordinate system to avoid the coordinate transformation of aerodynamic coefficients in a wind axial coordinate system in the existing galloping analysis methods. As...

Determination Method for Basic Design Wind Speed of Mountainous-Valley Bridge

WANG Kai, LIAO Haili, LI Mingshui, MA Cunming

2013, 26(1): 29-35. doi: 10.3969/j.issn.0258-2724.2013.01.005

[Abstract](1230)

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In order to provide a valuable parameter for the design of mountainous-valley bridges, a long-span suspension bridge was taken as an engineering example. Under the circumstance of lacking wind speed data at the bridge site, based on meteorological stations' statistics around the bridge site the mete...

Experimental Research on Influence of Transverse Crack on Corrosion Rate of Rebar in Concrete

JI Yongsheng, ZENG Ping, MA Huirong, ZHANG Linglei, ZHAO Wen

2013, 26(1): 36-41,61. doi: 10.3969/j.issn.0258-2724.2013.01.006

[Abstract](1367)

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In order to probe into the effects of transverse crack on the corrosion rate of rebars in concrete, microcell and macrocell corrosions of rebars were investigated experimentally on beam specimens with a transverse crack with different crack widths, and the effects of crack width and concrete surface...

Reasons for Displacement of Ballastless Track Slab during Self-Compacting Concrete Pouring

XU Guihong, LIU Xueyi, YANG Rongshan, YANG Junbin

2013, 26(1): 42-46. doi: 10.3969/j.issn.0258-2724.2013.01.007

[Abstract](1287)

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Abstract:
In order to reduce the workload of fine adjustment track laying and improve the precision of track slab, a calculation model was established based on the characteristic of pouring self-compacting concrete under track slab and the fluid mechanics, and forces on track slab in self-compacting concrete ...

Soil Plugging Effect of Sleeves Driven by High Frequency Hammers

GUO Liqun, WANG Lei, CHEN Fuquan

2013, 26(1): 47-54. doi: 10.3969/j.issn.0258-2724.2013.01.008

[Abstract](1356)

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In order to investigate the formation mechanism of soil plugging effect when a large-diameter bored-pile sleeve is penetrated by high frequency hammers, numerical simulation analyses were performed by using the 3D granular discrete element method. Variations in the displacements, velocities, contact...

Dynamic Responses of Three-Dimensional Entity Slope under Earthquake

HE Liu, WU Guang, XIE Chiwangmiao

2013, 26(1): 55-61. doi: 10.3969/j.issn.0258-2724.2013.01.009

[Abstract](1226)

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In order to investigate the distribution rules of acceleration, speed and displacement (short for three parameters) responses of a slope subjected to an earthquake, a 3D model for an ideal slope was established based on the Lagrangian finite difference method. Effects of slope form on the distributi...

Time Series Analysis of Japan IGS Sites before Tohoku Mw9.0 Earthquake

LI Meng, HUANG Dingfa, YAN Li, FENG Wei

2013, 26(1): 62-68. doi: 10.3969/j.issn.0258-2724.2013.01.010

[Abstract](1105)

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To investigate the movement characteristics of IGS (International GNSS (global navigation satellite system) Service) sites in Japan before Tohoku Mw9.0 earthquake, the observed data obtained by 7 IGS sites located in Japan from January, 2007 to March, 2011 were utilized. A polynomial fitting method ...

New Method of Second-Order Height Control Surveying Based on Georobot

LIU Chenglong, YANG Xuefeng, ZHANG Yuechuan

2013, 26(1): 69-74. doi: 10.3969/j.issn.0258-2724.2013.01.011

[Abstract](1125)

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In order to solve the existing problems in current leveling such as great labor intensity, low efficiency and long observation routes in complex mountainous areas, a new method based on georobot simultaneously subtending observation for obtaining indirect height difference in trigonometric leveling ...

Experimental Study on Hysteretic Behavior of Square Tubular T-Joints Reinforced with Collar Plate

SHAO Yongbo, WANG Wenjie, CHEN Ying

2013, 26(1): 75-80. doi: 10.3969/j.issn.0258-2724.2013.01.012

[Abstract](1101)

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To assess the anti-seismic behavior of reinforced welded tubular joints with circular hollow section, the hysteretic performance of square tubular T-joints with collar plate reinforcement was studied experimentally. Hysteretic tests were carried out on 2 square tubular T-joints with collar plate rei...

Power Supply Capacity of Traction Cable for AC Electrified Railway

LI Qunzhan, YI Dong, HE Jianmin

2013, 26(1): 81-87. doi: 10.3969/j.issn.0258-2724.2013.01.013

[Abstract](1164)

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In order to achieve traction power supply for AC electrified railways, the electromagnetic induction principle of two-conductor cables and Carson's theory were used to study the shunt coefficient between cable and catenary. The wave impedance and natural power of the cable were analyzed, and the pow...

P2P-Based Media Streaming Distribution Model and Its Application in Video Conference System

GAO Ang, XU Shuang, LI Zengzhi, LI Mo

2013, 26(1): 88-93. doi: 10.3969/j.issn.0258-2724.2013.01.014

[Abstract](1020)

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In order to solve the problem of poor service quality of a traditional video conference system, a hybrid distribution model named VCStream (video conference stream) was proposed. In this model, a tree system is composed of source data nodes, and a reserve pool is used to store new nodes. As a result...

Resource Allocation Scheme Based on Load Balancing for OFDMA Two-Hop Relay Networks

ZHAO Yue, FANG Xuming, HUANG Bo, CHEN Yu

2013, 26(1): 94-101. doi: 10.3969/j.issn.0258-2724.2013.01.015

[Abstract](1031)

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In order to accommodate different user distributions in cells, a resource allocation scheme based on load balancing (RALB) was proposed for OFDMA(orthogonal frequency division multiple access)-based two-hop relay networks (TRNs). Because of the difficulty to solve a joint optimization problem, a ste...

ADS-B-Based Algorithm for Real-Time Optimal Estimation of Radar Biases

WU Zhenya, WANG Minghui, ZHANG Ruiping, ADU Jianhua, HU Jun

2013, 26(1): 102-106,115. doi: 10.3969/j.issn.0258-2724.2013.01.016

[Abstract](1308)

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In order to improve the surveillance accuracy of radars in China's central and western regions, where multiple coverage does not come true and majority airplanes are not equipped with ADS-B (automatic dependent surveillance-broadcast), an ADS-B-based algorithm for real-time optimal estimation of rad...

Outlier Detection Model for Data Streams Based on Attribute Associations and Match Difference Degree

JU Chunhua, LI Yaolin

2013, 26(1): 107-115. doi: 10.3969/j.issn.0258-2724.2013.01.017

[Abstract](1021)

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In order to solve the problem of outlier detection for categorical data streams, an outlier detection model for data streams based on attribute associations and match difference degree was proposed, called as AAMDD. This model builds an association rule library off-line and updates it with the incre...

Fuzzy Reconfigurable Design Principles and Methods of Complex Mechanical Products

HU Guangzhong, XIAO Shoune, XIAO Shide, LIU Zhongbin

2013, 26(1): 116-121. doi: 10.3969/j.issn.0258-2724.2013.01.018

[Abstract](1085)

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In order to overcome the limitations of the existing theories and methods for reconfigurable design and achieve a rapid design of new products, fuzzy reconfigurable design principles and methods of mechanical products are proposed by introducing the fuzzy set theory into the reconfigurable design af...

Vision-Based Precision Measurement Technology for O-Ring Seal Size

CHEN Lili, LIAO Qiang

2013, 26(1): 122-128. doi: 10.3969/j.issn.0258-2724.2013.01.019

[Abstract](1247)

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To overcome the disadvantages in existing methods for detecting the size of O-ring seals, a precise measurement method based on active vision was proposed, and the technologies such as automatic quick-focusing, sub-pixel edge detection, and edge fitting were studied. The procedure of automatic quick...

Detection Method of Typical Defects in Arc Ferrite Magnet Surface

JIANG Honghai, LI Xueqin, LIU Peiyong, YIN Goufu

2013, 26(1): 129-134,140. doi: 10.3969/j.issn.0258-2724.2013.01.020

[Abstract](1158)

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An automatic detection approach was proposed to solve unstable accuracy problem of bare-eye inspection of surface defects on arc magnets. According to the geometry features such as the length and area of arc magnet contours, a primary classification of defects was implemented by the support vector m...

Multi-resolution Wavelet Decomposition of Chinese Aviation Network

YAO Hongguang

2013, 26(1): 141-146. doi: 10.3969/j.issn.0258-2724.2013.01.022

[Abstract](1106)

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In order to alleviate the high computational load of overall feature analysis caused by too large a number of nodes and edges in aviation network, a complex network data compression method based on wavelet decomposition theory was put forward. The applicability and decomposition forms of Haar wavele...

Multi-objective Intelligent Optimization of Noise Abatement Departure Trajectory

WANG Chao, WANG Fei

2013, 26(1): 147-153. doi: 10.3969/j.issn.0258-2724.2013.01.023

[Abstract](1772)

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For the purpose of noise abatement and reducing flight cost during departure trajectory optimal design in the next generation air traffic management system, the multi-objective optimization and design method for departure trajectory was addressed. A segmented trajectory model according with the feat...

Risk Prediction Model and Methodology of Airport Congestion Based on Probabilistic Demand

LI Shanmei, XU Xiaohao, WANG Fei

2013, 26(1): 154-159. doi: 10.3969/j.issn.0258-2724.2013.01.024

[Abstract](1124)

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In order to obtain the probabilistic distribution and variation of the airport traffic demand for a future time interval and quantify the uncertainty of airport demand, the influence of arrival-departure timing on traffic demand prediction was analyzed from the viewpoint of uncertainty in traffic de...

Quality Evaluation of Expressway Pavement Based on Fuzzy Neural Networks

XIE Feng, MA Zhimin, LUAN Weidong

2013, 26(1): 160-164. doi: 10.3969/j.issn.0258-2724.2013.01.025

[Abstract](1289)

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In order to improve the precision of highway asphalt pavement quality evaluation, a comprehensive evaluation model of pavement quality was built using Takagi-Sugeno (T-S) fuzzy theory combined with back propagation (BP) neural network. In this model, 4 indexes including expressway asphalt pavement c...

Microscopic Traffic Model in Virtual Environment

LIU Donghui, SU Hu

2013, 26(1): 165-172. doi: 10.3969/j.issn.0258-2724.2013.01.026

[Abstract](1213)

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In order to improve the simulation fidelity of vehicle behaviors in a virtual traffic environment and realize real-time interaction between users and the system, a microscopic traffic model was proposed. This model is composed of a road model and a vehicle behavior model. The road model has a hierar...

Reaction Time and Headway in Car-Following Flow

XU Ting, CAO Shili, MA Zhuanglin, ZHU Tong, WANG Weili

2013, 26(1): 173-177. doi: 10.3969/j.issn.0258-2724.2013.01.027

[Abstract](1332)

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In order to investigate the effect of using driving simulator to simulate driving behaviors, car following experiments were conducted in virtual and real road environments using the fourth ring road in Beijing as an example to create simulation scenarios and taking into account the factors such as g...

Discriminating Threshold of Driving Fatigue Based on the Electroencephalography Sample Entropy by Receiver Operating Characteristic Curve Analysis

ZHAO Xiaohua, XU Shili, RONG Jian, ZHANG Xingjian

2013, 26(1): 178-183. doi: 10.3969/j.issn.0258-2724.2013.01.028

[Abstract](1214)

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In order to acquire an objective and accurate driving fatigue threshold, electroencephalography (EEG) signals of drivers were collected from driving simulator, and the time-domain characteristics of EGG signals of drivers in sober and mental fatigue states were comparatively analyzed. Considering th...

Optimization Model and Algorithm for Quay Crane Scheduling in Container Terminals

QIN Jin, NI Linglin, WANG Chengna, MIAO Lixin

2013, 26(1): 184-192. doi: 10.3969/j.issn.0258-2724.2013.01.029

[Abstract](1398)

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In order to remedy the defect of the traditional optimization methods for the quay crane scheduling in container terminal which could only deal with single ship, a mixed-integer programming optimization model for quay crane scheduling and job assignment for multiple ships was proposed. The objective...

Layout Scheme of Measuring Array in Ships' Electric Field Measuring Station

HU Yingdi, GONG Shenguang, CHEN Cong

2013, 26(1): 135-140. doi: 10.3969/j.issn.0258-2724.2013.01.021

[Abstract](1103)

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Abstract:
To evaluate the stealth effect of ships' electric field and provide a theoretical basis for designing and establishing of ship's electric field measuring station, the influences of measuring sensor array's width and spacing between sensors in the station on the precision of related depth extrapolati...

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2013 Vol. 26, No. 1