• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database

2012 Vol. 25, No. 4

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Modal Parameter Identification of Reinforced Concrete Arch Bridge under Ambient Excitation
PU Qianhui, QIN Shiqiang, SHI Zhou, WANG Qiuping, GOU Hongye
2012, 25(4): 539-545. doi: 10.3969/j.issn.0258-2724.2012.04.001
[Abstract](1248) PDF 748KB(529)
Abstract:
An ambient vibration test was conducted on a reinforced concrete arch bridge to correctly choose a modal parameter identification method. Modal parameters were identified using frequency domain, time domain and time-frequency analysis methods. They are the peak-picking, the stochastic subspace ident...
DEA-Based Evaluation of Wind Shielding Effect of Wind Barrier for Railway Bridges
XIANG Huoyue, LI Yongle, LIAO Haili
2012, 25(4): 546-550,566. doi: 10.3969/j.issn.0258-2724.2012.04.002
[Abstract](1178) PDF 615KB(527)
Abstract:
In order to evaluate the wind shielding effect of wind barrier for railway bridges, aerodynamic coefficients of a train and two trains passing each other on a railway bridge installed wind barrier with different heights were measured by wind tunnel tests. On the basis of the test results, it was put...
Accurate Calculation and Adjustment Methods for Cable Forces of Anchor-Span Strands for Suspension Bridges
ZHANG Xingbiao, SHEN Ruili, TANG Maolin, YE Huawen
2012, 25(4): 551-557. doi: 10.3969/j.issn.0258-2724.2012.04.003
[Abstract](1857) PDF 858KB(560)
Abstract:
In order to accurately obtain the cable forces of anchor-span strands for suspension bridges to easily control the cable forces in construction course, a refinement model was established using nonlinear analysis software BNLAS and based on identified parameters of anchor-span strands of Taizhou Yang...
Analytical Investigation of Bridge Seismic Vulnerability in Wenchuan Earthquake
CHEN Libo, ZHENG Kaifeng, ZHUANG Weilin, MA Hongsheng, ZHANG Jianjing
2012, 25(4): 558-566. doi: 10.3969/j.issn.0258-2724.2012.04.004
[Abstract](1501) PDF 1135KB(366)
Abstract:
In order to evaluate the seismic loss risk of highway bridge systems in Wenchuan area, Sichuan, China, statistical seismic vulnerability models of bridges were established based on the collected bridge damage data from the Wenchuan earthquake. A modified Wenchuan earthquake attenuation model was dev...
Setting-out Mechanism of Landslide Induced by Earthquake
GU Chengzhuang, HU Xiewen, LUO Gang, NIU Yanbo, HU Hengyang
2012, 25(4): 567-572. doi: 10.3969/j.issn.0258-2724.2012.04.005
[Abstract](1072) PDF 696KB(400)
Abstract:
The starting mechanism of earthquake-induced landslides was investigated in order to make a further research on the complex dynamics mechanism of landslide setting out. Based on the analysis of aggregated elastic strain energy, the expression of the setting-out velocity of seismic landslides was der...
Seismic Dynamic Responses of No.19 Grotto's West Side Cave of Yungang Grottoes
SUN Bo, PENG Ningbo, WANG Fengrui
2012, 25(4): 573-579. doi: 10.3969/j.issn.0258-2724.2012.04.006
[Abstract](1681) PDF 817KB(435)
Abstract:
A three-dimensional entity model for the 19th grotto's west side cave of Yungang Grottoes was built in order to explore the seismic dynamic responses of grottoes. A finite difference software, FLAC3D, was used to numerically simulate the displacement, acceleration amplification factor, stress distri...
Determination of Optimal Sand Content for Improving High Liquid Limit Soil
CHENG Tao, HONG Baoning, LIU Xin, HUANG Man
2012, 25(4): 580-585,596. doi: 10.3969/j.issn.0258-2724.2012.04.007
[Abstract](1081) PDF 783KB(266)
Abstract:
In order to determine the optimal sand content, high liquid limit soils were classified respectively based on fine particle content, liquid limit and soil CBR (California bearing ratio) value, the range of the optimal sand content for different types of high liquid limit soils were ascertained. The ...
Experimental Research on Onset of Muddy Clay Exposed to Unidirectional Flow
YANG Bing, CAI Ruiqing, TANG Chi, MA Jianlin, HUHE Aode
2012, 25(4): 586-590. doi: 10.3969/j.issn.0258-2724.2012.04.008
[Abstract](1042) PDF 594KB(274)
Abstract:
In order to investigate the onset law of muddy clay, the onset characteristics of muddy clay with different sedimentary densities were investigated experimentally by the synchronous measurement of water grey level and flow velocity. The experimental results show that the phenomenon of the onset of m...
Comprehensive Assessment Method for Health Status of Subgrade in Existing Line Speed-Raising Reconstruction
FANG Tao, LIU Xinrong, GENG Daxin, DIAO Xinhong
2012, 25(4): 591-596. doi: 10.3969/j.issn.0258-2724.2012.04.009
[Abstract](1154) PDF 788KB(327)
Abstract:
To deal with the speed-raising reconstruction for an existing railway line, the health status of the subgrade of the line need to be assessed first. On the basis of a field investigation of the subgrade damage, the subgrade was divided into 24 segments to be tested according to the severity of subgr...
Wheel-Rail Force Continuous Measurement Based on Combinational Forecast Model
LI Yifan, LIN Jianhui, LIU Jianxin
2012, 25(4): 597-604. doi: 10.3969/j.issn.0258-2724.2012.04.010
[Abstract](1631) PDF 1007KB(468)
Abstract:
In order to accurately judge vehicle operation state, a wheel-rail force continuous measure method was put forward. Based on the wheel-rail interaction characteristics, the available data of wheel-rail force were extracted from test data by using the threshold value judgmental method. From the uncer...
Design Method for Rigid Frog Based on Wheel/Rail Contact Parameters
CAO Yang, WANG Ping, ZHAO Weihua
2012, 25(4): 605-610,617. doi: 10.3969/j.issn.0258-2724.2012.04.011
[Abstract](1204) PDF 726KB(454)
Abstract:
A design method of rigid frog structure based on contact parameters was proposed in order to improve its wheel/rail interaction relationship. Using the method, the top profiles of nose rail and wing rail of No.12 rigid frog were optimized. The results show that the wheel/rail relationship can be imp...
Dynamic Parameter Design Method for Turnout and Its Application in Switch Design
LIU Zhe, WANG Ping, CHEN Rong, QUAN Shunxi
2012, 25(4): 611-617. doi: 10.3969/j.issn.0258-2724.2012.04.012
[Abstract](1334) PDF 735KB(601)
Abstract:
In order to design the wheel-rail relation in turnout intuitively and quickly, a dynamic parameter design method for turnout was put forward based on the static contact theory of wheel-rail in turnout and by analyzing the vertical vibration of independent wheel and the hunting motion of single wheel...
Detection of Residual Stress in Aluminum Alloy Carbody of High-Speed Train Using X-ray Diffraction Technology
GOU Guoqing, HUANG Nan, CHEN Hui, TIAN Aiqin
2012, 25(4): 618-622. doi: 10.3969/j.issn.0258-2724.2012.04.013
[Abstract](1353) PDF 582KB(282)
Abstract:
In order to test the surface residual stress in the aluminum alloy carbody of high-speed trains accurately, quickly, and non-destructively, the tensile test of an equal strength rod was used to calibrate the measurement of X-ray diffraction (XRD) method. The residual stress values of welded joints i...
Numerical Simulation of Heat Exchange Performance of Radiator Module in Construction Vehicles
LIU Jiaxin, QIN Sicheng, XU Zhenyuan, ZHANG Ao, XI Yu, ZHANG Xuelin
2012, 25(4): 623-628. doi: 10.3969/j.issn.0258-2724.2012.04.014
[Abstract](1284) PDF 725KB(528)
Abstract:
In order to study the performance law of a construction vehicle radiator under different working conditions and ensure its working stability, a 3D physical model of the vehicle engine cabin was built based on original drawings with the software UG NX7.0, in which a heat exchange module was adopted t...
Fretting Wear Behavior of Angular Contact Ball Bearings
WANG Siming, GAO Hongli, XU Mingheng
2012, 25(4): 629-633. doi: 10.3969/j.issn.0258-2724.2012.04.015
[Abstract](1011) PDF 606KB(529)
Abstract:
In order to investigate the fretting wear behavior of angular contact ball bearings under different loads, oscillation angles, and number of cycles, a series of tests for angular contact ball bearings (QJ208) were performed under dry condition on a self-made bearing fretting wear test rig with four ...
Effects of Internal Heat Exchanger on Performance of Transcritical CO2 Heat Pump System
JIN Dongxu, WANG Ping, KOYAMA Shigeru, TAKATA Nobuo
2012, 25(4): 634-638. doi: 10.3969/j.issn.0258-2724.2012.04.016
[Abstract](1296) PDF 582KB(289)
Abstract:
The performance of a transcritical CO2 heat pump system applied for hot water supply was experimentally investigated under various refrigerant charging conditions to clarify the effects of the heat transfer area of an internal heat exchanger (IHX) on the system performance. Experiments were conducte...
Multi-objective Shape Optimization of Hydrodynamic Journal Bearings Using Non-dorminated Sorting Genetic Algorithm Ⅱ
PANG Xiaoping, CHEN Jin
2012, 25(4): 639-645. doi: 10.3969/j.issn.0258-2724.2012.04.017
[Abstract](1347) PDF 792KB(428)
Abstract:
In order to overcome the shortcoming caused by taking the eccentricity as the initial design variables in the shape optimization model, i.e., the optimized shape was localized in the original shape, a new mathematic model of multi-objective shape optimization for hydrodynamic journal bearings was bu...
Formation Mechanism of Hot Spot in Stress Control Cable Terminations under Harmonic Voltages
ZHOU Kai, LI Xutao, HUANG Youcong, WAN Li, ZHAO Wei
2012, 25(4): 646-651. doi: 10.3969/j.issn.0258-2724.2012.04.018
[Abstract](1159) PDF 729KB(577)
Abstract:
In order to investigate the premature failure of a stress control cable termination under high frequency harmonic voltages, the relationship between hot spot and applied voltage frequency was researched to the stress control cable termination. A high frequency harmonic generator was utilized to simu...
Web Services Evaluation Model Based on Variant Time Utility
YIN Guisheng, CUI Xiaohui, MA Zhiqiang, DONG Hongbin
2012, 25(4): 652-661. doi: 10.3969/j.issn.0258-2724.2012.04.019
[Abstract](1030) PDF 1248KB(589)
Abstract:
To solve the problems of the KNN (k-nearest neighbor) method in the quantification of time utility, the width of evaluation windows and the control of feedback, a web services evaluation model with variant time utility (WSEM-VTU) was proposed. In WSEM-VTU, the system dynamics is used to investigate ...
Moving Objects Detection Algorithm Based on Three-Dimensional Gaussian Mixture Codebook Model
HUANG Jin, JIN Weidong, QIN Na
2012, 25(4): 662-668. doi: 10.3969/j.issn.0258-2724.2012.04.020
[Abstract](1036) PDF 850KB(758)
Abstract:
In order to solve the difficulty of adjusting parameters for the codebook model and the computational complexity of probability distribution for the Gaussian mixture model in intelligent visual surveillance, a moving objects detection algorithm based on the three-dimensional Gaussian mixture codeboo...
On-Board Software Self-recovery Technique for Defending MBU Effect
BAO Haichao, YANG Genqing, ZHANG Yuning
2012, 25(4): 669-674. doi: 10.3969/j.issn.0258-2724.2012.04.021
[Abstract](967) PDF 783KB(449)
Abstract:
A software self-recovery technique was proposed to mitigate the effect of multi-bit upsets (MBUs) on on-board computers to guarantee satellite safety. This technique takes advantages of the inherent multi-bit error detection capability of hardware EDAC (error detection and correction) and self-recov...
Security Analysis of Video Hashing
LIU Li, WANG Yongqing
2012, 25(4): 675-679. doi: 10.3969/j.issn.0258-2724.2012.04.022
[Abstract](897) PDF 584KB(568)
Abstract:
In order to analyze the security of robust multimedia hashing quantitatively, Shannon's unicity distance was adopted to explain the security of robust multimedia hashing. A typical robust video hashing algorithm was used as an example, and a mathematics model for randomized feature extraction of the...
Aircraft Departure Slot Control Method Based on Multi-objective Optimization
WANG Fei, MU Weiwei, DONG Jiankang
2012, 25(4): 680-685. doi: 10.3969/j.issn.0258-2724.2012.04.023
[Abstract](1446) PDF 688KB(344)
Abstract:
In order to balance efficiency and equity and make best use of slot resources, aircraft departure slots were allocated. According to the decision-making targets of airport control operation departments and airline companies, three kinds of multi-objective optimization methods were established throug...
Dynamic Reroute Planning under Uncertain Severe Convective Weather
MENG Linghang, XU Xiaohao, LI Shanmei, GENG Zengxian
2012, 25(4): 686-691. doi: 10.3969/j.issn.0258-2724.2012.04.024
[Abstract](1597) PDF 632KB(402)
Abstract:
In order to solve the reroute planning problem with uncertain severe convective weather, a state transition matrix was built using the uncertain measure of forecasting state and the random error of extrapolating position for rainstorm cloud cluster. The matrix was then used to predict the time-varyi...
Phase Field Modeling of Internal Convection and Free Interface Deformation of Levitated Droplet of Molten Silicon
SHI Wanyuan, ZHANG Fengchao, TIAN Xiaohong, TSUKADA Takao
2012, 25(4): 692-697. doi: 10.3969/j.issn.0258-2724.2012.04.025
[Abstract](1187) PDF 621KB(405)
Abstract:
In order to simulate the two-phase flow with high density ratio, the algorithm of Newton iteration was utilized to solve a discretized semi-implicit Cahn-Hilliard equation. The dam-break flow problem and the interface deformation of a rising air bubble in water were numerically simulated using the p...
Improved Particle Swarm Optimization Algorithm for Sound Absorption Model with Polyurea Coating
ZHANG Wencheng, ZHOU Suihua, QU Yang
2012, 25(4): 698-704. doi: 10.3969/j.issn.0258-2724.2012.04.026
[Abstract](1368) PDF 884KB(427)
Abstract:
To improve the stealth performance of small underwater targets with anechoic coating, a reflection coefficient formula was deduced based on a basic sound absorption model for multilayer structure with polyurea coating. According to the application requirements of material optimization, a modified dy...
Random Lattice Order Group Decision-Making Based on Interval Probability Preferences
GUO Chunxiang, GUO Qiang, GUO Yaohuang
2012, 25(4): 705-711. doi: 10.3969/j.issn.0258-2724.2012.04.027
[Abstract](1215) PDF 766KB(352)
Abstract:
To solve the random lattice order group decision-making problems where preference relations are random and probability of random events is described by interval values, a decision-making method based on the preferences of decision makers subject to an interval probability distribution is proposed. F...
Multi-attribute Group Decision-Making Method for Interval Number Decision Information
YOU Houxing, LIN Jie
2012, 25(4): 712-718. doi: 10.3969/j.issn.0258-2724.2012.04.028
[Abstract](1245) PDF 754KB(451)
Abstract:
In the process of group decision-making, it is difficult to determine accurate index weight and expert weight coefficients, and obtain precise decision-making information. To solve this problem, a group decision-making method was presented based on a set-valued statistics model and the information a...

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