西南交通大学学报

Causes of Daily Strong Wind on Bridge Site in Deep Gorge with High Altitude and High Temperature Difference

LI Yongle, ZHANG Mingjin, XU Xinyu, TAO Qiyu, ZHU Ledong, SONG Lili

2014, 27(6): 935-941. doi: 10.3969/j.issn.0258-2724.2014.06.001

[Abstract](1137)

Abstract:
In order to investigate the causes of daily strong wind on a bridge site in a deep gorge with a high altitude and a high temperature difference, the field measurement of wind characteristics was carried out on the Dadu River bridge site with the CAW600-RT automatic-weather-station (AWS), hand anemom...

3-Node Sptial Saddle Element for Finite Element Calculation of Suspension Bridge

QI Dongchun, SHEN Ruili, LIU Zhangjun, TAN Yunzhi

2014, 27(6): 942-947. doi: 10.3969/j.issn.0258-2724.2014.06.002

[Abstract](1102)

Abstract:
In order to solve the computational problem of nonlinear contact between main cable and saddle on tower top, a new 3-node spatial saddle element, including the saddle on tower top and both sides of the main cable, was produced. Based on the spatial catenary theory and the geometric relationship betw...

Damping and Frequency of Simplified Cable-Network-Damper System with Cross-Tie Fixed to Ground

ZHOU Haijun, YANG Xia

2014, 27(6): 948-953. doi: 10.3969/j.issn.0258-2724.2014.06.003

[Abstract](1033)

Abstract:
The dynamics of cable network with both cross-ties and dampers are important for cable vibration mitigation. A simplified cable-network-damper system was proposed. It is comprised of two parallel cables and a cross-tie fixed on ground. The cross-tie was simplified as linear spring elements. Based on...

Effects of Ballast Bed Section Dimension on Its Lateral Resistance

GAO Liang, LUO Qi, XU Yang, JIANG Hanke, QU Cun

2014, 27(6): 954-960. doi: 10.3969/j.issn.0258-2724.2014.06.004

[Abstract](1234)

Abstract:
In order to reveal the variation characteristics of ballast bed lateral resistance, a three-dimensional model for ballast bed and sleeper was established based on the discrete element method. The effects of important factors of ballast bed section dimension, such as ballast bed slope grade, thicknes...

Effects of Contact Loss underneath Concrete Roadbed on Dynamic Performances of Slab Track-Subgrade System

REN Juanjuan, YAN Xiaobo, XU Guanghui, XU Kun

2014, 27(6): 961-966. doi: 10.3969/j.issn.0258-2724.2014.06.005

[Abstract](968)

Abstract:
ANSYS/LS-DYNA, a large general finite element software, was used to establish a vertical vibration model for vehicle-track-subgrade coupling system, and the dynamic responses of a vehicle-track system caused by contact loss underneath concrete roadbed were analyzed. The research results show that co...

Stability Analysis of Slopes Reinforced with Sheet Pile Wall

LUO Yu, XU Qiang, HE Siming, HE Jinchuan

2014, 27(6): 967-971. doi: 10.3969/j.issn.0258-2724.2014.06.006

[Abstract](996)

Abstract:
In order to analyze the stability of a slope reinforced with sheet pile wall, based on the multi-wedge translation mechanism the upper bound method was applied to derive the expressions to calculate needed lateral force acting on piles to guarantee the stability of a slope. A new method was presente...

Disaster Reduction Techniques of Railway Route Selection in Mountainous Regions with High Earthquake Intensity

QIU Yanling, YAO Lingkan, ZHU Ying, WEI Yongxing

2014, 27(6): 972-980. doi: 10.3969/j.issn.0258-2724.2014.06.007

[Abstract](1074)

Abstract:
To reduce earthquake-induced disasters of railway in mountainous regions with a high earthquake intensity from fountainhead, the disaster reduction techniques of the selection of transportation corridors and the space layout of railway lines, were researched based on the concept of risk control. Fro...

Comparative Research on Flat Steel and Damper Strengthening of Straight Type of Tenon-Mortise Joints

PAN Yi, WANG Chao, TANG Lina, LI Lingjiao, GENG Pengfei

2014, 27(6): 981-986,1031. doi: 10.3969/j.issn.0258-2724.2014.06.008

[Abstract](1063)

Abstract:
For better seismic reinforcement of Chinese ancient wooden buildings, based on the mechanical model for straight type of tenon-mortise joints the flat steel strengthening and damper strengthening of straight type of tenon-mortise joints were investigated respectively by taking the Yellow Emperor Tem...

Support Vector Classification Algorithm by Migration Sampling for Structural System Reliability Evaluation

BAI Bing, LI Qiao, ZHANG Qinghua

2014, 27(6): 987-994. doi: 10.3969/j.issn.0258-2724.2014.06.009

[Abstract](988)

Abstract:
In order to avoid the cumbersome bounding operation during system reliability evaluation procedures, a concept of system limit state surface was introduced on account of the characteristic of system multi-failure modes. Employing the support vector classification (SVC) algorithm to divide the securi...

Bayesian Methods for Inferring Representative Values of Variable Actions in Small Sample Situations

YAO Jitao, WANG Xudong

2014, 27(6): 995-1001. doi: 10.3969/j.issn.0258-2724.2014.06.010

[Abstract](1125)

Abstract:
There is a need sometimes in engineering to infer the representative values of variable actions in cases when the test data is not sufficient, but the classical statistics methods do not take into account of the succedent influences of statistical uncertainty, and the inferred results are always on ...

Geometry Simulation of Track Torsion-Irregularity Based on 6-DOF Platform

LIU Yumei, CAO Xiaoning, ZHAO Congcong, XIONG Mingye, ZHANG Jingshi

2014, 27(6): 1002-1009. doi: 10.3969/j.issn.0258-2724.2014.06.011

[Abstract](859)

Abstract:
In order to obtain the geometry information of track torsion irregularity, an inverse kinematics model and a pose correlation model for the double 6-degree-of-freedom (DOF) platform of a track torsion irregularity simulator were established, taking into account the characteristics of torsional irreg...

Stability Analysis of Parametric Vibration for Gear Transmission System in High-Speed Train

HUANG Guanhua, ZHANG Weihua, FU Yongpei, LIANG Shulin, WANG Xingyu

2014, 27(6): 1010-1015. doi: 10.3969/j.issn.0258-2724.2014.06.012

[Abstract](1273)

Abstract:
In order to study the stability of the gear transmission system in high-speed trains, a dynamic model describing the torsional vibration behaviors of the gear system was developed. In this model, the time-varying mesh stiffness of meshing teeth pairs was calculated through finite element analysis, a...

Reliability and Delay of DSPN-Based Ground Communication System in High-Speed Maglev Vehicles

MA Lianchuan, ZHANG Yuzhuo, SUN Yaqing, MU Jiancheng, CAO Yuan

2014, 27(6): 1016-1023. doi: 10.3969/j.issn.0258-2724.2014.06.013

[Abstract](1098)

Abstract:
To achieve the real-time and large-capacity communication of maglev operation control system when the train runs at high speeds, a DSPN-based (deterministic and stochastic Petri nets) model was built according to the communication failure modes of 38 GHz millimeter wave. Further, a vehicle-ground do...

Influential Factors and Rules for Insertion Loss of High-Speed Railway Noise Barriers

ZHOU Xin, XIAO Xinbiao, HE Bin, HAN Jiaqi, WEN Zefeng, JIN Xuesong

2014, 27(6): 1024-1031. doi: 10.3969/j.issn.0258-2724.2014.06.014

[Abstract](1107)

Abstract:
Based on the boundary element method and the train noise sources identified by a beam-forming noise source system, a numerical prediction model was established to study the factors and rules relevant to the insertion loss of high-speed railway noise barriers. The effects of noise source locations, n...

A Review of Developments in Reinforcement Learning for Multi-robot Systems

MA Lei, ZHANG Wenxu, DAI Chaohua

2014, 27(6): 1032-1044. doi: 10.3969/j.issn.0258-2724.2014.06.015

[Abstract](1496)

Abstract:
Reinforcement learning (RL) is an effective mean for multi-robot systems to adapt to complex and uncertain environments. It is considered as one of the key technologies in designing intelligent systems. Based on the basic ideas and theoretical framework of reinforcement learning, main challenges suc...

Decision and Control of Catenary On-Line Anti-icing Current in Autotransformer Power Supply System

GUO Lei, GAO Xiaojie, LI Qunzhan

2014, 27(6): 1045-1051. doi: 10.3969/j.issn.0258-2724.2014.06.016

[Abstract](1258)

Abstract:
In order to prevent icing on catenaries and ensure trains' normal operation on electrified railways, a circuit model for the autotransformer (AT) power supply system during anti-icing period was built according to the special structure of long and short loops of the AT power supply system. This mode...

Stability of High Order Fuzzy Cohen-Grossberg Neural Networks with Unbounded Time Delays

ZHENG Weifan, ZHANG Jiye

2014, 27(6): 1052-1060. doi: 10.3969/j.issn.0258-2724.2014.06.017

[Abstract](861)

Abstract:
Using M-matrix theory, matrix inequality and vector Lyapunov methods, the global exponential stability of a class of high-order fuzzy Cohen-Grossberg neural networks with unbounded time delays was investigated. Without assuming the monotonicity, differentiability and Lipschitz continuity of the acti...

Single-Objective Multi-modal Expected Value Programming Based on Immune Optimization

YANG Kai, ZHANG Zhuhong

2014, 27(6): 1061-1067. doi: 10.3969/j.issn.0258-2724.2014.06.018

[Abstract](930)

Abstract:
To solve the problem of single-objective multi-modal expected value programming with unknown noisy distribution, a multi-objective immune optimization algorithm based on immune response principles was proposed. By means of a random function used for checking whether a candidate solution was a locall...

Model and Architecture of Open SaaS Industry Service Platform

GUO Yanqun, HAN Min, SUN Linfu

2014, 27(6): 1068-1072. doi: 10.3969/j.issn.0258-2724.2014.06.019

[Abstract](2067)

Abstract:
In order to satisfy enterprises' multiplex requirements for the extensible and programmable operations of information systems, the conception of open SaaS (software-as-a-service) industry service platform, called as OSISP for short, was put forward by combining the open-system design idea and the Sa...

Numerical Simulation of Monitoring Wheel-Rail Contact Conditions Using Ultrasonic Technology

DENG Weili, XIAO Nan, YONG Yuan

2014, 27(6): 1073-1077. doi: 10.3969/j.issn.0258-2724.2014.06.020

[Abstract](1148)

Abstract:
In order to realize the real-time monitoring of train's running state and ensure the safety of train operation, a method to monitor the wheel-rail contact condition using ultrasonic technology was proposed. The W-M fractal function was used for mathematic description of wheel and rail surfaces, and ...

Electric-Hydraulic System for Continuously Variable Transmission: Test Analysis and Fault Detection

HAN Ling, ZHANG Libin, AN Ying, ANWAR Sohel

2014, 27(6): 1078-1083. doi: 10.3969/j.issn.0258-2724.2014.06.021

[Abstract](789)

Abstract:
To determine if the performance of the electro hydraulic control module for continuously variable transmission could match the national standards of China, the stress level, pressure regulating curve, repeat accuracy, and speed of step response of the electro-hydraulic control module were analyzed b...

Identification of Torsional Damping Coefficients for Internal Combustion Engine Crankshafts

HUA Chunrong, DONG Dawei, YAN Bing

2014, 27(6): 1084-1089. doi: 10.3969/j.issn.0258-2724.2014.06.022

[Abstract](1009)

Abstract:
In order to solve the difficulty of selecting the damping coefficients in torsional vibration theoretical analysis of internal combustion engine (ICE) crankshafts, an identification method of torsional damping coefficients of main crankshafts components was proposed based on the modal damping ratio ...

Effect of Surface Treatment on Properties of HDPE/EVA/EG Composites

CHEN Xiaolang, SUN Zhidan, MA Yonghong, ZHANG Zhibin, YU Jie

2014, 27(6): 1097-1101. doi: 10.3969/j.issn.0258-2724.2014.06.024

[Abstract](850)

Abstract:
In order to obtain the composites with good thermal stability, flammability, and mechanical properties, high density polyethylene/ethylene-vinyl acetate copolymer (HDPE/EVA) composites filled with expandable graphite (EG) flame retardant were prepared by using a twin-screw extruder technique. The th...

Evaluation Parameter Research of Asphalt Binder Fatigue

SUN Yanna, LI Lihan, WANG Yukai

2014, 27(6): 1102-1107. doi: 10.3969/j.issn.0258-2724.2014.06.025

[Abstract](998)

Abstract:
In order to determine the evaluation parameter of asphalt binder fatigue performance, fatigue performances of 5 kinds of asphalt binder (including olefin asphalt binder, natural asphalt binder, hard asphalt binder, A70# asphalt, and SBS asphalt)and asphalt mixture were tested in laboratory. Then, 4 ...

Simulation of Effect of Train Arrival Delay on Wagon Flow Connection at Technical Stations

CHEN Dong, PENG Qiyuan, LI Yonghui

2014, 27(6): 1108-1115. doi: 10.3969/j.issn.0258-2724.2014.06.026

[Abstract](993)

Abstract:
In order to clarify the interaction mechanism between the flow and lines in railway system, the influence of train delay on wagon flow connection at technical stations was analyzed. By setting the minimum average residence time of transferring wagons as the optimization objective, a generalized wago...

Constraint Propagation and Heuristics Backtracking Algorithm for Static Wagon-Flow Allocation at a Marshalling Station

MA Liang, GUO Jin, CHEN Guangwei

2014, 27(6): 1116-1122. doi: 10.3969/j.issn.0258-2724.2014.06.027

[Abstract](885)

Abstract:
In order to improve the efficiency of stage planning, a hybrid algorithm was designed to solve the lexicographic multi-objective cumulative scheduling model of the static wagon-flow allocation problem at a marshalling station. The proposed algorithm is based on iteration method, constraint propagati...

Critical Discharge Flow of Sand Cleaning Fluid Considering Transient Temperature Effect of Horizontal Well

LIU Qingyou, WANG Xingming, XU Tao

2014, 27(6): 1123-1129. doi: 10.3969/j.issn.0258-2724.2014.06.028

[Abstract](1048)

Abstract:
Hydraulic sand cleaning operation of horizontal well in oil and gas fields is difficult because it is hard to obtain a reasonable discharge volumetric flow of the sand cleaning fluid (SCF) in practice. To solve this problem, an annular critical velocity model that is based on the transient thermal m...

Registration Method for Point Cloud Based on Feature of One Plane and Two Cylindrical Holes

JIANG Lei, LI Xiangbiao, MA Shuwen, ZHOU Liangming, LI Qiqin, DUAN Changde

2014, 27(6): 1090-1096. doi: 10.3969/j.issn.0258-2724.2014.06.023

[Abstract](922)

Abstract:
For improving the registration accuracy between point cloud and design model of the parts during scan detection, a registration method based on the feature of one plane and two cylindrical holes was proposed. The rough registration applies the features of plane and holes to coincide with the local c...

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2014 Vol. 27, No. 6