西南交通大学学报

Dynamic Analysis of Structural Adaptivity of Ballastless Track Substructure of High-Speed Railway

QIU Yanjun, FANG Mingjing, ZHANG Xiaojing, WEI Yongxing

2011, 24(2): 183-187. doi: 10.3969/j.issn.0258-2724.2011.02.001

[Abstract](2681)

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Abstract:
To discuss the adaptivity of track substructure of high-speed railway, the historical development of the structural analysis and design of track substructure was reviewed as the numerical analysis basis of the structural behavior of ballastless track substructure with a case study of Sui-Yu (Suining...

Dynamic Analysis of Longitudinally Connected Ballastless Track on Earth Subgrade

XU Peng, CAI Chengbiao

2011, 24(2): 189-194. doi: 10.3969/j.issn.0258-2724.2011.02.002

[Abstract](2451)

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Abstract:
A coupled dynamic model of train-longitudinally connected ballastless track on earth subgrade was established. In the model, the track and subgrade were regarded as a layered viscoelastic body, which was modeled on continuum theory, and discretized with Galerkin method. The model was used to analyze...

Calculation of Wheel Wear Based on Semi-Hertzian Contact

DING Junjun, LI Fu, HUANG Yunhua

2011, 24(2): 195-200. doi: 10.3969/j.issn.0258-2724.2011.02.003

[Abstract](1444)

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To study the effect of wheel/rail contact theory on wheel wear calculation, wheel/rail contact stress and contact patch were analyzed using the semi-Hertzian contact theory, the Hertzian contact theory and the CONTACT program of Kalker's exact theory. Then, the creep forces under semi-Hertzian conta...

Effect of Spiral Transition Curve Length on Vehicle Path

LIN Yu, YANG Zhen, PAN Xiaodong

2011, 24(2): 200-204. doi: 10.3969/j.issn.0258-2724.2011.02.004

[Abstract](1683)

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In order to reveal the influence rule of spiral transition curve length on the path of a vehicle under free flow traffic states, a driver direction control model for highway alignment safety evaluation was put forward on the basis of the preselect optimal curvature method and by introducting the hor...

Preparation of Geopolymeric Concrete and Its Application to Rapid Repair of Cement Concrete Pavement

PENG Xiaoqin, YANG Tao, WANG Kaiyu, MENG Xiangjie

2011, 24(2): 205-210. doi: 10.3969/j.issn.0258-2724.2011.02.005

[Abstract](1468)

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To solve the problems of long traffic opening time and low durability of the existing cement concrete pavement repair materials, a geopolymeric concrete was developed and applied to rapid repair of cement concrete pavement. The influence of Portland cement dosage and activator to solid ratio on the ...

Capillary Water Absorption Behavior of CA Mortar

ZENG Xiaohui, DENG Dehua, XIE Youjun

2011, 24(2): 211-216. doi: 10.3969/j.issn.0258-2724.2011.02.006

[Abstract](1214)

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In order to investigate the character of water transportation in cement-emulsified asphalt mortar (CA mortar) for CRTS (China railway track system) Ⅰ-type slab ballastless track (CRTS Ⅰ-type CA mortar), changes in the contact angle of water and mass of capillary water adsorption with time were teste...

Prediction of Biaxial Fatigue of Steel Bridge Gusset Plate Based on Stress Field Intensity Method

ZHOU Shangmeng, LI Yadong

2011, 24(2): 217-222. doi: 10.3969/j.issn.0258-2724.2011.02.007

[Abstract](1582)

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In order to assess the biaxial or multi-axial fatigue behavior of some particular structure details of steel bridges, the stress field intensity method was applied to establish a field diameter solving model of steel bridge components. Based on that, the concept of effective field diameter was put f...

Effect of Fire Fighting Water on Compressive Strength of Concrete in Tunnel Fire

WANG Zhen, LI Guhua, ZHANG Zejiang, HUANG Tao

2011, 24(2): 223-227. doi: 10.3969/j.issn.0258-2724.2011.02.008

[Abstract](1513)

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In order to investigate the influences of fire fighting water on the mechanical properties of HPC (high porfomance concrete) in a tunnel fire, the variation of the characteristics of samples with fire temperature was researched experimentally, the effect of fire fighting water on the residual compre...

Experimental Investigation and Design of Artificial Structures Controlling Dam-Break Floods

CHEN Xiaoqing, ZHAO Wanyu, GAOQuan, JIAShitao, ZHU Xinghua

2011, 24(2): 228-234. doi: 10.3969/j.issn.0258-2724.2011.02.009

[Abstract](1201)

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In order to verify the control effect of different artificial structures in dealing with barrier dam-break floods, flume model tests were conducted in lab on tetrahedral entity structure (TES), tetrahedral entity structure group (TESG), tetrahedral frame structure (TFS) and tetrahedral frame structu...

Differences between Fault-Normal and Fault-Parallel Components of Horizontal Ground Motion in Wenchuan Earthquake

YANG Yongqiang, XIE Lili, LI Ming, HU Jinjun

2011, 24(2): 235-240. doi: 10.3969/j.issn.0258-2724.2011.02.010

[Abstract](1498)

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Totally 113 groups of horizontal ground motion were selected from the Wenchuan earthquake to study the influence of fault strike on horizontal ground motion. Differences between fault-normal (FN) and fault-parallel (FP) components were researched by comparing the peak ground acceleration, duration, ...

Availability of ITRF Frames in High Precision Satellite Positioning

GAO Shuzhao, HUANG Dingfa

2011, 24(2): 241-246. doi: 10.3969/j.issn.0258-2724.2011.02.011

[Abstract](1228)

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For the multi-source selection of coordinates and velocities of IGS (International Global Navigation Satellite System Service) tracking stations, the coordinates and velocities of 4 IGS tracking stations in China were collected from 4 international organizations, and they were converted to the same ...

Sensor Selection Optimization for Monitoring System of Large-Scale Group-Pile Foundation

TANG Yong, CHEN Zhijian

2011, 24(2): 247-252. doi: 10.3969/j.issn.0258-2724.2011.02.012

[Abstract](1516)

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In order to optimize the sensor system for a large-scale group-pile foundation and properly select sensor types, a multi-sensor optimization model was established, and the genetic algorithm was used to solve this optimal problem. In this model, the cost of the sensor system is set as the objective f...

Automatic Generation of Railway Initial Horizontal Alignment Based on Optimal Route Analysis

HAN Chunhua, YI Sirong, YANG Yang

2011, 24(2): 252-258. doi: 10.3969/j.issn.0258-2724.2011.02.013

[Abstract](1232)

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In order to make the initial horizontal alignment of railway line more practical and meet the design code, a method for automatic generation of railway horizontal alignment was proposed based on knowledge reasoning and optimal route analysis in raster data format. First, the Dijkstra algorithm was i...

Influence of Mechanical Parameter Errors on Pre-impact Speed of Vehicles in Vehicle Collision Models

ZHANG Jian, ZHANG Xin

2011, 24(2): 259-263. doi: 10.3969/j.issn.0258-2724.2011.02.014

[Abstract](1232)

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In order to measure accurately the influence of mechanical parameter errors on the pre-impact speed of vehicles in vehicle collision models，an influence analysis method was built by matrix theory. According to common error forms，the influence of mechanical parameter errors in one model with a centro...

Reliability Analysis of Urban Rail Transit Vehicle's Door System Based on GO Method

CAI Guoqiang, ZHOU Liming, LI Xi, JIA Limin

2011, 24(2): 264-270. doi: 10.3969/j.issn.0258-2724.2011.02.015

[Abstract](1455)

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In order to simplify the calculation of parallel redundancy operators, the characteristic value calculation method of GO operators was used to study the signal failure rate distribution characteristics of the parallel redundancy operators. The feasibility was validated that the repairable system wit...

Numerical Simulation of Temperature Distribution of Induction Plasma Torch in Preparation of Superfine Powder

CHEN Xiao'an, SHANG Fujun, SONG Shuncheng

2011, 24(2): 271-276. doi: 10.3969/j.issn.0258-2724.2011.02.016

[Abstract](1597)

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To obtain the temperature field of the radio frequency induction plasma torch in preparation of superfine powder, the governing equations for the coupled electric field, temperature field and flow field were set up based on heat transfer, electromagnetic theory, and incompressible Navier-Stocks equa...

Bearing Combination-Based Fusion Algorithm for Heterogeneous Sensors Track Data

HUANG Youpeng, WU Hanbao, ZHANG Zhiyun

2011, 24(2): 277-281. doi: 10.3969/j.issn.0258-2724.2011.02.017

[Abstract](1324)

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To the track data fusion caused by the difference between the measurement spaces of a 2D radar and a bearing-only sensor, a fusion algorithm for heterogeneous sensors track data was proposed based on bearing combination. With this algorithm, bearing measure of the target track detected by the radar ...

Factors Influencing Dielectric Frequency Responses of Oil-Paper Insulation

LIU Jun, WU Guangning, ZHOU Lijun, MIN Yingji

2011, 24(2): 282-287. doi: 10.3969/j.issn.0258-2724.2011.02.018

[Abstract](1356)

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The dielectric frequency response method was used to model an oil-paper insulation system. The time domain dielectric response function and its frequency response were derived. An experimental system was designed to measure the dielectric frequency responses of oil-paper insulation at different temp...

Recent Development on Consensus-Based Kalman Filtering in Multi-agent Systems

MA Lei, SHI Xizhi

2011, 24(2): 287-293. doi: 10.3969/j.issn.0258-2724.2011.02.019

[Abstract](1761)

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Recent development of the distributed Kalman filtering using the consensus method was addressed. The concept, convergence and performance analysis of consensus problems in multi-agent systems were introduced, and several aspects of the consensus-based Kalman filtering were discussed in details, incl...

PHAF-Based Detection of Multi-component LFM Emitter Signal

Rong Haina, Zhan Gexiang, Jin Weidong

2011, 24(2): 294-302. doi: 10.3969/j.issn.0258-2724.2011.02.020

[Abstract](1343)

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To effectively detect a multi-component emitter signal (MCES) composed of several signal components with different energies and serious overlapping in the time-frequency plane, a detection method based on product high-order ambiguity function (PHAF) was proposed. By using a strategy of peeling onion...

Parameter Estimation of Co-channel Multi-signals Based on Cyclic Spectrum Amplitude

YU Ningyu, MA Hongguang, SHI Rong, YUZ hibin

2011, 24(2): 303-309. doi: 10.3969/j.issn.0258-2724.2011.02.021

[Abstract](1204)

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To solve the problem that the signal received by a non-cooperative receiver in communication reconnaissance is interfered by co-channel signals, a new algorithm based on cyclic spectrum amplitude was proposed to estimate the carrier frequencies and chip width of multi-signals. This algorithm is suit...

Key Management Scheme for Clustered Wireless Sensor Networks

YU Wangke, MA Wenping, CHEN Hefeng

2011, 24(2): 310-314. doi: 10.3969/j.issn.0258-2724.2011.02.022

[Abstract](1575)

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In order to overcome the limitations in power, computation, storage space and band width, a key management scheme for clustered wireless sensor networks was presented. Combinatorial design is adopted in this scheme so that the nodes in the same cluster can directly establish shared keys while the on...

Efficient and Secure Authentication Scheme for Vehicular Ad Hoc Networks

LIU Hui, LI Hui, MA Zhanxin

2011, 24(2): 315-520. doi: 10.3969/j.issn.0258-2724.2011.02.023

[Abstract](1012)

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In order to resolve the safety problem in vehicular ad hoc networks (VANET), an efficient privacy-preserving scheme was proposed for VANET message authentication, which is based on the bilinear pairing technique for large-scale group communication and synthetically considers the actual situation of ...

Reliable Network Design Based on Partial Stochastic User Equilibrium

PU Yun, LIU Haixu

2011, 24(2): 321-325. doi: 10.3969/j.issn.0258-2724.2011.02.024

[Abstract](1610)

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To reduce the performance uncertainty caused by traffic accidents in a road network, the partial stochastic user equilibrium was used to describe the status of a road network under the impact of accidents, and a bi-level programming model for reliable network design problem was formulated. In the up...

Multi-objective 0-1 Linear Programming Model for Combined Location-Routing Problem in Hazardous Waste Logistics System

Shai Bin, ZHAOJ iahong

2011, 24(2): 326-332. doi: 10.3969/j.issn.0258-2724.2011.02.025

[Abstract](1376)

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An improved multi-objective 0-1 mixed-integer linear programming model for the location-routing problem in hazardous waste logistics was proposed, in which the optimization objectives are to minimize total costs and risks, and the constraints include waste types and treatment technologies, capacity ...

Improved Ant Colony System Algorithm for Waste Collection Vehicle Routing Problem

LIU Jie, LI UDan, HE Yanfeng

2011, 24(2): 333-339. doi: 10.3969/j.issn.0258-2724.2011.02.026

[Abstract](1398)

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In order to solve the waste collection vehicle routing problem with intermediate facilities (WCVRP-IF) and reduce the route length and overlaps between two different vehicle routes, a clustering-based multiple ant colony system (CMACS) algorithm was proposed. This CMACS algorithm possesses a set of ...

Airspace Sector Probabilistic Traffic Demand Prediction Model

TIAN Wen, HU Minghua

2011, 24(2): 340-346. doi: 10.3969/j.issn.0258-2724.2011.02.027

[Abstract](1894)

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In order to predict the traffic demands and variations for a future time interval in an airspace sector, the influence of the aircraft flight time on the probabilistic traffic demand prediction was analyzed from the point of uncertainty with a simplified airspace structure. The probabilistic distrib...

Revenue-and-Expense Sharing Contract for Closed-Loop Supply Chain Coordination in Multiple Retail Markets

CHEN Yanru, TANG Xiaoping, XIAO Qinxin

2011, 24(2): 347-353. doi: 10.3969/j.issn.0258-2724.2011.02.028

[Abstract](1113)

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With assumptions that the sale price affected the demand directly and the recycling price and the effort level of recycling affected the recycling amount, supply chain coordination models under centralized, decentralized and revenue-and-expense sharing contracts were proposed. Optimal decisions and ...

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2011 Vol. 24, No. 2