西南交通大学学报

Rain-Wind-Induced Vibration of Cables in Cable-Stayed Bridges (Ⅱ): Parameter Study

LI Yong-Le, XIANG Guo-Ti, YAN Dian-Guo, LIAO Hai-Li

2011, 24(5): 713-718. doi: 10.3969/j.issn.0258-2724.2011.05.001

[Abstract](1963)

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Abstract:
In order to probe into factors influencing the wind-rain-induced vibration of cables in cable-stayed bridges, a systemic parametric investigation was carried out based on the modified galloping model and aerodynamic coefficients from spatial model tests. They are aerodynamic parameters, including ri...

Damage Location Identification of Railway Bridge Based on Vibration Response Caused by Vehicles

FU Chun-Yu, CHAN De-Shan, LI Jiao

2011, 24(5): 719-726. doi: 10.3969/j.issn.0258-2724.2011.05.002

[Abstract](1558)

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In order to detect the bridge damage caused by train load, a method for damage location identification was put forward based on acceleration response caused by vehicles. With this method, structural damage vulnerability is firstly analyzed to find out vulnerable sections. From the damage states of t...

Model Test for Local Stress Distribution in Anchorage Zones of Continuous Rigid Frame Composite Arch Bridge

JIANG Jun, BO Qian-Hui, GOU Gong-Xie

2011, 24(5): 726-731. doi: 10.3969/j.issn.0258-2724.2011.05.003

[Abstract](1537)

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In order to investigate the distribution of local stresses in the anchorage zones of a continuous rigid frame composite arch bridge, model tests for roof and floor anchorage zones were carried out by taking Yichang Yangtze River bridge along Yichang-Wanzhou railway line as the research object, and t...

Active Earth Pressure of Cohesive Soil Backfill on Retailing Wall with Curved Sliding Surface

WANG Kui-Hua, MA Shao-Dun, TUN Wen-Bing

2011, 24(5): 732-738. doi: 10.3969/j.issn.0258-2724.2011.05.004

[Abstract](1273)

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In order to determine the sliding surface form of the soil backfill and calculate the earth pressure, static equilibrium equations of sliding wedge were built for cohesive soil backfill by limit equilibrium method. Then, the equation of the sliding surface and the analytical expression for the total...

Numerical Simulation of Grouting Effect Detection of Karst Roadbed Using Transient Rayleigh Wave Method

ZHENG Li-Ning, XIE Jiang, LIN Xin-Gong, FENG Chi-Guo, DIAO Wen

2011, 24(5): 739-745. doi: 10.3969/j.issn.0258-2724.2011.05.005

[Abstract](1952)

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To investigate the effectiveness of the application of the transient Rayleigh wave method to the quality detection of grouting in karst roadbed, two numerical models were built from the characters of typical geology sections in the field. They are respectively for underground strata with or without ...

Experimental Investigation of Flexural Behavior of Concrete Beams Strengthened with GFRP

ZHANG Zhi-Jiang, SHI Xiao-Quan, LI Zhi-Ye

2011, 24(5): 745-751. doi: 10.3969/j.issn.0258-2724.2011.05.006

[Abstract](1447)

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To deeply research the bending properties and design method of glass fiber reinforce plastic (GFRP) reinforced concrete beams, the flexural capacities of 36 concrete beams was investigated under the loading mode of four-point bending moment, including 21 GFRP reinforced concrete beams and 15 steel r...

Bearing Capacity of Pinned-End Built-up Cruciform Section Members Formed by Two Equal-Leg Angles under Compression Load

YANG Long-Yu, LI Zheng-Liang

2011, 24(5): 752-757. doi: 10.3969/j.issn.0258-2724.2011.05.007

[Abstract](1012)

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To verify the applicability of high-strength steel to lattice-steel towers, an experiment covering 21 Q420 specimens, involving 3 different sectional dimensions (2L160×12, 2L160×14, and 2L160×16) and 7 kinds of slenderness ratios ranging from 25 to 55, was run to test the bearing capacity of pinned-...

Model Test on Application of Grouting Steel-Tube Micropiles to Landslide Reinforcement

CHEN Jiang, CHEN Wei-Tao, LIU Shi-Dong, MA Jing-Jie

2011, 24(5): 758-763. doi: 10.3969/j.issn.0258-2724.2011.05.008

[Abstract](1520)

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In order to investigate the reinforcing mechanism of grouting steel-tube micropiles on landslide, their control effects were analyzed from the displacements of slope top, slope surface and slope body through centrifugal model tests. The force characteristics of steel-tube micropiles reinforcing land...

Design and Realization of Center Differential Positioning System

LIAO Hua, FENG Wei, HUANG Ding-Fa

2011, 24(5): 764-769. doi: 10.3969/j.issn.0258-2724.2011.05.009

[Abstract](1117)

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In order to overcome the deficiency of traditional network RTK (real-time kinematic) positioning, a center differential positioning system, cenDPS, was proposed based on the internet. This system is on the basis of the traditional network RTK technology and centers the differential processing on the...

Review of Stability Analyses of Formation Control with Time Delay

ZHANG Ru-Bei, JIANG Li-Mei, LIU Bai-Long

2011, 24(5): 770-778. doi: 10.3969/j.issn.0258-2724.2011.05.010

[Abstract](1321)

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To research the stability of a formation control system with time delays systematically, two types of formalized descriptions of formation stability were presented. From the individual dynamic models, formation control strategies with time delays based on linear or non-linear feedback control and th...

Price-Based Congestion Control Algorithm for Wireless Multi-hop Networks

HE Rong, FANG Xu-Meng

2011, 24(5): 779-786. doi: 10.3969/j.issn.0258-2724.2011.05.011

[Abstract](1115)

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In order to alleviate network congestion effectively and find a proper balance point between QoS guarantee and fairness among different types of traffic, a price-based hop-by-hop congestion control scheme was proposed. In this scheme, the constraints in MAC (medium access control) time and binary in...

Energy Saving Resource Allocation Scheme in OFDMA-Based Multi-hop Cellular Networks

XIANG Zheng, FANG Xu-Meng, XU Feng

2011, 24(5): 787-792. doi: 10.3969/j.issn.0258-2724.2011.05.012

[Abstract](1609)

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A hierarchical tree topology of orthogonal frequency division multiple access (OFDMA)-based multi-hop cellular network was proposed to reduce energy assumption in resource allocation. The timing of transmitting and receiving for the nodes in odd and even layers is defined. The objective is to reduce...

Dynamic Wireless Sensor Network Based on Mobile Base Station

ZHOU Xiao-Jia, TUN Xia, YAN Bin

2011, 24(5): 793-797. doi: 10.3969/j.issn.0258-2724.2011.05.013

[Abstract](1206)

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In order to investigate the route hotspot problem in wireless sensor network (WSN), a BS- CH (base station-cluster head) hybrid mobile strategy based on event-driven, BS-CH HMS (base station-cluster head hybrid mobile strategy), was proposed on the assumption of CH mobility. In this strategy, the mo...

Optimization Design of Band-Edge Selectivity for General Chebyshev Filter

SHU Yong-Zhong, LIU Jian-Beng

2011, 24(5): 797-802. doi: 10.3969/j.issn.0258-2724.2011.05.014

[Abstract](1093)

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In order to get miniaturized high-performance filters, based on analyzing the impact of transmission zeros on the selectivity of a filter a new design method was proposed for maximizing the band-edge selectivity of general Chebyshev filters with a minimum filter order. Based on maximizing the band-e...

Optimization and Experimental Study of 18-Element Linearly-Polarized Radial Waveguide Array Antenna

WANG Xin, LIU Qiang-Xiang

2011, 24(5): 803-807. doi: 10.3969/j.issn.0258-2724.2011.05.015

[Abstract](1009)

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In order to improve the performance of a 18-element linearly-polarized waveguide array antenna, three methods were used to optimize the array antenna, including changing the the feeding network's seal shape for the array unit and optimizing the feeding probe, improving the cell antenna, and reducing...

Relative Orientation Method of UAV Images without Ground Control Points

TANG Min, LI Yong-Shu, HE Jing

2011, 24(5): 808-813. doi: 10.3969/j.issn.0258-2724.2011.05.016

[Abstract](1946)

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In order to solve the problem of low accuracy in image relative orientation due to the posture instability of unmanned aerial vehicle (UAV), a method to generate UAV image strips and constitute pair of stereoscopic images based on POS (position and orientation system) data was proposed. In accordanc...

Double-Feedback-Based Two-Stage Switch Architecture

SHEN Zhi-Jun, CENG Hua-Shen, GAO Zhi-Jiang

2011, 24(5): 814-819. doi: 10.3969/j.issn.0258-2724.2011.05.017

[Abstract](1051)

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To relax the time constraint on scheduling algorithms of FTSA (feedback-based two-stage switch architecture), a new scheme called DFTS (double-feedback-based two-stage switch architecture) was proposed. This switch architecture feeds back twice at both ends of each time slot. Based on the double-fee...

Optimization ofP rimary Vertical Suspension of Heavy Haul Freight Car

YANG Chun-Lei, LI Fei, HUANG Yun-Hua

2011, 24(5): 820-825.

[Abstract](1294)

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Theef fects of the primary vertical suspension on the dynamic mechanics of heavy haul freight cars were analyzed by simulation to decrease dynamic wheel/rail interactions through optimizing the parameters of the primary vertical suspension.The vehicle-track coupling dynamics and the method of optima...

Lateral Stability of Single Wheelset under Traction

TAO Yuan, ZHANG Gong-Jun, LUO Bin, JIN Ding-Chang

2011, 24(5): 826-830. doi: 10.3969/j.issn.0258-2724.2011.05.019

[Abstract](1251)

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A simplified dynamic model of single wheelset under traction was established to study its lateral stability. The hunting stability was analyzed on different adhesion conditions between wheel and rail. The results show that a single wheelset has a better lateral stability under traction than under id...

Technology for Monitoring Automotive Engine Lubricating Oil by Dielectric Constant Method

LI Chi-Wu, SU Jian, LIU Yu-Mei

2011, 24(5): 831-835. doi: 10.3969/j.issn.0258-2724.2011.05.020

[Abstract](1219)

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In order to monitor the quality of lubricating oil quickly so as to replace the oil timely, a theoretical analysis method of dielectric constant was used to study the correlation between the iron abrasive grit content, moisture content and total acid value of the lubricating oil and the dielectric c...

Structural Design and Strength Analysis of Water-Cooled Magnet Vessel

DIAO Ji-Xing, DING Li-Ren, LIU Xiao-Ning

2011, 24(5): 836-840. doi: 10.3969/j.issn.0258-2724.2011.05.021

[Abstract](1279)

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In order to build steady high magnetic field experimental devices of water-cooled magnets, a structural design was made for a water-cooled magnet vessel. In the design plan, the capping was composed of three circular steel plates which were welded in the superimposed form, and the cylinder consisted...

Stability Analysis of Cantilevered Pipes Conveying Fluid with Hysteretic Supports

HUANG Qian, CANG Feng-Gang, ZHANG Yi-Xiong

2011, 24(5): 841-846. doi: 10.3969/j.issn.0258-2724.2011.05.022

[Abstract](1220)

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In order to study the nonlinear dynamic characteristics of a pipe conveying fluid with hysteretic supports, the hysteretic forces acting on the pipe was introduced into Hamilton's energy equation in the principle of virtual work, and the nonlinear dynamic equations of cantilevered pipes conveying fl...

Application of Particle Swarm Optimization to Structural Non-probabilistic Reliability Optimization

ZHENG Yan, CHENG Wen-Meng, CHENG Ti, ZHANG Ze-Jiang

2011, 24(5): 847-852. doi: 10.3969/j.issn.0258-2724.2011.05.023

[Abstract](1447)

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In order to solve the reliability optimization problem of uncertainty structures in actual engineering, an optimization model was established to minimize the structure mass with the constraints of its non-probabilistic reliability index and cross-sectional area. The non-probabilistic reliability ind...

Macro Planning of Highway Hubs Adapting to Changchun-Jilin High-Speed Railway Project

WANG Jing, WANG Dian-Hai, CHEN Song

2011, 24(5): 853-860. doi: 10.3969/j.issn.0258-2724.2011.05.024

[Abstract](1475)

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China devoted major efforts to develop high-speed railways. In order to deal with the impacts on the regional highway system from the project of high-speed railways, methods for forecasting the indexes of GDP, population, highway passenger volume and highway freight volume were put forward according...

Evaluation Method for Travel Time Reliability of Road Network with Stochastic Demand

KUANG Ai-Wu, HUANG Zhong-Xiang, KUANG Qun

2011, 24(5): 861-867. doi: 10.3969/j.issn.0258-2724.2011.05.025

[Abstract](1480)

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A model for evaluation of travel time reliability of routes and OD pairs was proposed. In the model, it is assumed that the deterministic user equilibrium (UE) is reachable under stochastic demands with a log-normal distribution. Route traffic flows are calculated with a route-based solution algorit...

Stochastic User Equilibrium Model Based on Cumulative Prospect Theory

ZHANG Bo, JUAN Zhi-Cai, LIN Xu-Xun

2011, 24(5): 868-874. doi: 10.3969/j.issn.0258-2724.2011.05.026

[Abstract](1289)

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In order to make traffic assignment be in more accordance with travelers' actual behavior, a continuous function for path prospect was presented based on the cumulative prospect theory. A stochastic user equilibrium model and its equivalent variational inequality were formulated. This model can capt...

Port Tugboat Operation Scheduling Optimization Considering the Minimum Operation Distance

LIU Zhi-Xiong

2011, 24(5): 875-881. doi: 10.3969/j.issn.0258-2724.2011.05.027

[Abstract](2059)

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In order to reasonably schedule tugboat operation, effectively improve tugboat utilization factor and reduce the waiting time of vessels, the multiprocessor tasks scheduling theory was applied to analyze the tugboat operation scheduling problem according to the characteristics of the tugboat operati...

Discriminant Method of Effective Capacity for Stochastic Ground Holding Policy Model

WANG Fei, WANG Xin-Long, XU Xiao-Hao

2011, 24(5): 882-887. doi: 10.3969/j.issn.0258-2724.2011.05.028

[Abstract](1361)

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In order to improve the efficiency of solving the stochastic ground holding policy (GHP) model, the delay cost formula was established by induction method. Then, 4 typical cases with different combinations between air-ground cost ratio and the probability of typical capacity scenarios were analyzed,...

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2011 Vol. 24, No. 5