西南交通大学学报

Symplectic Random Vibration Analysis of Vertically Coupled Vehicle-Track-Tunnel System Considering Frequency-dependent Stiffness of Rail Pads

WANG Ping, YANG Fan, WEI Kai

2017, 30(2): 209-215. doi: 10.3969/j.issn.0258-2724.2017.02.001

[Abstract](648)

Abstract:
In order to accurately predict the frequency-domain characteristics of random vibration of vehicle bogies, wheels, and the fundamental structure under wheels, a symplectic mathematics model of random vibration of a coupled vehicle-track-tunnel system is established using the pseudo excitation method...

Triaxial Test and DEM Analysis of Ballast Aggregate with Angularity Breakage

JING Guoqing, HUANG Hongmei, SHI Xiaoyi, CAI Xiaopei

2017, 30(2): 216-221. doi: 10.3969/j.issn.0258-2724.2017.02.002

[Abstract](632)

Abstract:
A series of triaxial monotonic compression tests were conducted to study the influence of angularity breakage on the deformation and mechanical properties of railway ballast. Different confining pressures were applied to ballast samples, including 10, 30 and 60 kPa to study the axial strain, volume ...

Analysis of Longitudinal Coupling of Turnout on Large-Span Tied Arch Bridges and Vehicle Running Performance

CHEN Rong, XING Jun, LIU Hao, TIAN Chunxiang, WANG Ping

2017, 30(2): 222-231. doi: 10.3969/j.issn.0258-2724.2017.02.003

[Abstract](626)

Abstract:
To meet the engineering requirements of laying welded turnouts on tied arch bridges, the longitudinal and lateral-vertical coupling vibration models were built based on the interaction principles of turnout-bridge and coupling dynamics of vehicle-turnout-bridge. Taking an example of a 205 m continuo...

Wheel-Rail Profile Matching for High Speed Railway with Different Rail Profiles

QIAN Yao, WANG Jian, WANG Ping, AN Boyang, SU Qian, XU Jingmang

2017, 30(2): 232-238. doi: 10.3969/j.issn.0258-2724.2017.02.004

[Abstract](834)

Abstract:
In order to analyze the influence of different rail profiles on the wheel-rail profile matching of high-speed railway in China, the classic track line method, the 3D non-Hertz rolling contact theory and the vehicle-track coupling dynamics are used to address the profile matching issue between the LM...

Simplified Calculation Method and Experimental Verification for Flexural Failure Skeleton Curve of RC Columns

HE Guangjie, ZHAO Yiding, XIN Yazhou, LIU Chengqing, NI Xiangyong

2017, 30(2): 239-246. doi: 10.3969/j.issn.0258-2724.2017.02.005

[Abstract](675)

Abstract:
In order to meet the requirements of performance-based seismic design and nonlinear dynamic analysis, it is necessary to explore the simplified calculation method for moment-rotation angle (M-) skeleton curve of flexural failure reinforced concrete (RC) columns. Firstly, the curve was simplified as ...

Experimental Study on Steel Reinforcement Protection in Magnesium Oxychloride Cement Concrete under Sulfate Environment

QIAO Hongxia, GONG Wei, WANG Penghui, CHEN Guangfeng, CHENG Qianyuan

2017, 30(2): 247-253. doi: 10.3969/j.issn.0258-2724.2017.02.006

[Abstract](576)

Abstract:
Aiming at the low brine corrosion resistance of ordinary silicate reinforced concrete in salt lake areas of western China, a magnesium oxychloride cement reinforced concrete with higher brine corrosion resistance was fabricated. The polarization curves and electrochemical parameters, including corro...

Analysis of Wind Characteristics on Double-Mast Cross-Rope Suspension Tower Influenced by Shielding Effect

LI Zhengliang, LIU Xinpeng, YAN Zhitao, XIAO Zhengzhi

2017, 30(2): 254-263. doi: 10.3969/j.issn.0258-2724.2017.02.007

[Abstract](575)

Abstract:
To investigate the wind load distribution of cross-rope suspension tower with occlusion, and provide theoretical basis for wind resistant design, a single-mast and double-mast systems were tested by high-frequency force balance in wind tunnel in type-B landform turbulent flow and uniform flow fields...

Numerical Experiments of Dynamic Response of Buried Gas Pipeline under the Action of Seismic Waves Induced by Tunnel Blasting

ZHENG Shuangying, YANG Lizhong

2017, 30(2): 264-271. doi: 10.3969/j.issn.0258-2724.2017.02.008

[Abstract](586)

Abstract:
In order to reasonably determine the vibration control standard of buried gas transmission pipeline under the action of seismic waves from blasting,it is important to clarify how the operating parameters of pipeline affect its dynamic response. Taking Xiannvyan tunnel blasting project as example (th...

Damping Modification Factors for Response Spectra of Pulse-like Near-fault Ground Motions

PU Wuchuan, HUANG Bin, KABANDO E K

2017, 30(2): 272-279,378. doi: 10.3969/j.issn.0258-2724.2017.02.009

[Abstract](597)

Abstract:
The damping modification factor quantifies the effect of damping ratio on seismic response of a structure. It is related to the spectral characteristics of ground motion, and is used to obtain the high damping spectra from the low damping spectra. This work aims to explore the damping effect on stru...

Reflection and Transmission of P Waves at Interfaces of Saturated Sandwiched Coarse Granular Structure

LIU Bao, SU Qian, ZHAO Wenhui, LIU Ting, PHAM Duc Phong, ZHOU Heng

2017, 30(2): 280-287. doi: 10.3969/j.issn.0258-2724.2017.02.010

[Abstract](568)

Abstract:
In order to study the reflection and transmission of stress wave at interfaces of the sandwiched coarse granular structure in embedded pile-board subgrade, an interface effect model for the coupled elastic solid-saturated coarse granular layer-elastic solid sandwich structure is established accordin...

Automatic Detection Method for Highway Pavement Cracking Based on the 3D Shadow Modeling

YANG Enhui, ZHANG Aonan, DING Shihai, WANG Kelvin C. P.

2017, 30(2): 288-294. doi: 10.3969/j.issn.0258-2724.2017.02.011

[Abstract](644)

Abstract:
Automatic detection method for pavement cracking based on 3D image technology has been a hot topic. In order to improve the accuracy and reliability of the cracking detection, a new method based on the 3D shadow modeling was proposed, which utilizes that the height of the fracture zone is lower than...

Application of StaMPS-MTI Technology in Monitoring Ground Subsidence

JIANG Zhaoying, YU Shengwen, TAO Qiuxiang

2017, 30(2): 295-302. doi: 10.3969/j.issn.0258-2724.2017.02.012

[Abstract](600)

Abstract:
In order to improve the spatial sampling rate of monitoring technologies, based on the methods of PS (permanent scatters) and SBAS (small baseline subsets), the point set of high coherence was optimally selected using StaMPS-MTI(stanford method for persistent scatterers-multi-temporal InSAR) technol...

United Programming Model for Dispatch of Emergency Rescue Teams and Road Reconstruction under Earthquake Disaster

ZHOU Rongfu, WANG Tao, WANG Ying

2017, 30(2): 303-308. doi: 10.3969/j.issn.0258-2724.2017.02.013

[Abstract](532)

Abstract:
In order to solve the problem of dispatch of emergency rescue teams and road reconstruction under earthquake disaster, considering the uncertainty of dispatch time under roads damaged and the demand of emergency rescue teams, a united programming model which took the constraints of rescue teams, res...

Investigation on Driving Comfort of Passenger Cars on Mountain Roads Based on Naturalistic Driving

XU Jin, YANG Kui, LU Gongyuan, SHAO Yiming

2017, 30(2): 309-318. doi: 10.3969/j.issn.0258-2724.2017.02.014

[Abstract](628)

Abstract:
Naturalistic driving tests were conducted using real vehicles on six roads to study the level of driving comfort on two-lane mountainroads and the key influencing factors. In the tests, acceleration data of passenger cars were collected; after filtered using Matlab software, the peak value of each w...

Integer Programming Model of Passenger Flow Assignment for Congested Urban Rail lines

LU Gongyuan, MA Si, WANG Kun, DENG Nian

2017, 30(2): 319-325. doi: 10.3969/j.issn.0258-2724.2017.02.015

[Abstract](697)

Abstract:
Urban rail transit lines are often hard to give full play to its passenger transport capacity in condition of oversaturated passenger flow. In order to maximize the passenger transportation capacity of congested urban rail transit lines, a linear integer programming model for urban rail transit pass...

Transfer-Oriented Dispatching Optimization of Rail Transit Network

HUANG Minghua, QU Hezhou, LIU Xiaobo, TANG Youhua

2017, 30(2): 326-333. doi: 10.3969/j.issn.0258-2724.2017.02.016

[Abstract](656)

Abstract:
As bottlenecks of rail transit network due to its high volume of transfer passengers during peak periods in big cities, transfer stations are facing problems of increasing safety risk, operation inefficiency, etc. To solve these problems, a mathematical model is developed using the nonlinear program...

Location of U-Turn Openings at Signalized Intersections Based on Optimal Traffic Capacity

SUN Feng, SUN Li, LI Qingyin, SUN Shaowei

2017, 30(2): 334-339. doi: 10.3969/j.issn.0258-2724.2017.02.017

[Abstract](591)

Abstract:
In order to solve the unreasonable deployment of U-turn openings at signalized intersections, a method is proposed to calculate locations of optimal U-turn openings based on the optimal traffic capacity by taking the traditional four-phase control intersection as an object. Firstly, a loss time mode...

Joint Probabilistic Data Association Algorithm Based on Adaptive Cluster Probability Matrix

LI Shouqing, XU Yang

2017, 30(2): 340-347. doi: 10.3969/j.issn.0258-2724.2017.02.018

[Abstract](773)

Abstract:
A novel JPDA method for data association on multi-target tracking system was presented for reducing the class of JPDA algorithm computational complexity and solving the problem of coalesce neighboring tracks. To improve the computational complexity, the joint association event probabilities were cal...

Effects of Space Harmonics on Series-Connected Symmetrical Six- and Three-Phase Permanent Magnet Synchronous Motors Driver System

LIU Lingshun, YAN Hongguang, HAN Haopeng, ZHAO Guorong

2017, 30(2): 348-354. doi: 10.3969/j.issn.0258-2724.2017.02.019

[Abstract](590)

Abstract:
The decouple operation of the series-connected symmetrical six- and three-phase permanent magnet synchronous motors (PMSMs) driven by single inverter is theoretically based on the sinusoid electromotive force. To study influences of space harmonics on the decouple control of the series-connected sys...

Maintenance Decision Modeling and Optimization Based on Markov Process for Combined Co-Phase Power Supply Equipment

LIU Hang, LI Qunzhan, GUO Kai

2017, 30(2): 355-362. doi: 10.3969/j.issn.0258-2724.2017.02.020

[Abstract](611)

Abstract:
To ensure reliability and economic efficiency in the engineering application of co-phase power supply systems, maintenance decision modeling and optimization for combined co-phase power supply units used in electrified railways was studied. Firstly, according to construction plan and operational mod...

Defect Detection of Solder Balls Based on Multi-Physical Field

ZHOU Xiuyun, XUE Yun, ZHOU Jinlong

2017, 30(2): 363-368. doi: 10.3969/j.issn.0258-2724.2017.02.021

[Abstract](583)

Abstract:
A pulsed eddy current thermal imaging method that is based on a coupled electric, magnetic, and thermal physical field was proposed for defect detection of solder balls in the production and service process of flip chips. In this method, an electromagnetic-thermal model for solder balls was establis...

Fault Diagnosis Method for Analog Circuits Based on Matrix Perturbation Analysis

ZHOU Qizhong, XIE Yongle

2017, 30(2): 369-378. doi: 10.3969/j.issn.0258-2724.2017.02.022

[Abstract](572)

Abstract:
To integrate the fault detection, fault localization and parameter identification of analog circuits in one system and reduce the cost and facilitate the engineering implementation of fault diagnosis, an fault diagnosis and parameter identification method for analog circuits based on matrix perturba...

Topology and Matching Capacity of Direct-Connected Converter for Co-phase Traction Power Supply Substation

HUANG Xiaohong, LI Qunzhan, YANG Naiqi

2017, 30(2): 379-388. doi: 10.3969/j.issn.0258-2724.2017.02.023

[Abstract](534)

Abstract:
To optimize the topology, improve the compensation capacity and decrease the space occupied by the equipment for co-phase power supply substations, universal transformation method about electrical parameters from three phase to single phase was adopted and three types of direct-connected converters ...

Wheel-Rail Profile Matching Relationship of EMU Train

XU Kai, LI Fu, LI Dongyu, ZHONG Hao

2017, 30(2): 389-399. doi: 10.3969/j.issn.0258-2724.2017.02.024

[Abstract](668)

Abstract:
In order to study the matching relationship between different wheel treads and rail profiles for EMU (electric multiple unit) trains, a comparative study was made by investigation of the wheel-rail contact geometry parameters, static mechanical properties, running stability of vehicles, and wheel-ra...

Coupled Dynamics Analysis for a Flexible Beam with a Trolley Subjected to Pendulum Payload

LIU Huasen, CHENG Wenming, YIN Hao

2017, 30(2): 400-407. doi: 10.3969/j.issn.0258-2724.2017.02.025

[Abstract](638)

Abstract:
The vibration of the crane beam and the residual swing of the payload cause fatigue damage of crane and affect the precise positioning of the payload. In this paper, a crane flexible beam with a moving trolley subjected to pendulum payload multibody coupled dynamic system was set up based on an elli...

Investigation on the Applicability of Pantograph and Catenary Model Urban Railway System

ZHOU Ning, ZOU Huan, ZOU Dong, TAN Mengying, ZHANG Weihua

2017, 30(2): 408-415,423. doi: 10.3969/j.issn.0258-2724.2017.02.026

[Abstract](643)

Abstract:
In order to analyze the applicability of pantographs and catneary models to the urban railway system, the pantograph was modeled as a lumped parameter system with two or three degrees of freedom and a multi-rigid model, while the rigid catenary was simplified as a beam model and a spring model with ...

GAO Xueyao, LI Huinan, ZHANG Chunxiang, YU Xiaoyang

2017, 30(2): 416-423. doi: 10.3969/j.issn.0258-2724.2017.02.027

[Abstract](573)

Abstract:
Model similarity computation is a key technology in retrieval of 3D CAD models. In order to accurately distinguish differences between two models, a method for model similarity calculation based on ant colony search was proposed. According to the difference of edge numbers, shape similarity between ...

Security of Finite State Machines in Sequential Circuits

PENG Kaibei, JIA Ruiqing

2017, 30(2): 424-428. doi: 10.3969/j.issn.0258-2724.2017.02.028

[Abstract](518)

Abstract:
In view of the potential security problems brought by the don't care state in the optimization of finite state machine (FSM), the definition of safe state and its design method are presented after analysis of the factors leading to intrusion into FSM and the attack paths. Without affecting the flip-...

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2017 Vol. 30, No. 2