2012 Vol. 12, No. 2

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Road and railway engineering
Design method of no-fines porous concrete composition based on vibration compaction
HU Li-qun, SHA Ai-min, ZHANG Sha-sha
Abstract: The viscosity change rules of cement pastes, cement fly-ash pastes and cement silica fume pastes with different water to powder ratios were studied by using paste penetration test.Paste adhesive capacity to aggregate and paste leakage condition were analyzed based on mixture mixing test and vibratio...
2012, 12(2): 1-9. doi: 10.19818/j.cnki.1671-1637.2012.02.001
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Calculation method of horizontal surrounding rock pressure for tunnel
LUO Yan-bin, CHEN Jian-xun
Abstract: The deformation feature of middle wall for tunnel during construction was analyzed, the inner relationship between the deformation and the horizontal load was studied, and a new calculation method of horizontal surrounding rock pressure for tunnel was proposed.In the method, the analysis theory of s...
2012, 12(2): 10-17. doi: 10.19818/j.cnki.1671-1637.2012.02.002
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Finite element model of flexible airport pavement structure for large aircraft
YOU Qing-long, LING Jian-ming, YUAN Jie, SHAO Dao-jie
Abstract: The finite element model of three-layer pavement structure was set up by using general finite element software ABAQUS.The influences of model geometry size, boundary conditions, contact conditions among layers, element types, and grid divisions on the mechanical responses of pavement structure were ...
2012, 12(2): 18-23. doi: 10.19818/j.cnki.1671-1637.2012.02.003
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Accelerated loading dynamic response of full-scale asphalt concrete pavement
GUAN Zhi-guang, ZHUANG Chuan-yi, LIN Ming-xing
Abstract: The dynamic response of pavement structure under moving vehicle loads was measured by using the accelerated loading test facility of full-scale asphalt concrete pavement.The dynamic strain at the bottom of surface layer for the pavement and the vertical compressive stress at the top of subgrade were...
2012, 12(2): 24-31. doi: 10.19818/j.cnki.1671-1637.2012.02.004
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Coupling vibration analysis of single-magnet suspension vehicle-bridge for maglev train
LIANG Xin, LUO Shi-hui, MA Wei-hua, WU Qing, XU Zi-qiang
Abstract: In order to study the coupling vibration of single-magnet suspension vehicle-bridge, suspension control system, vehicle structure, elastic track beam and bridge installation system were taken as a whole system, and maglev train suspension control-elastic bridge-mechanical structure vertical coupling...
2012, 12(2): 32-37. doi: 10.19818/j.cnki.1671-1637.2012.02.005
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Numerical limit analysis of stability for bedding rock cutting slope
CHEN Peng, XU Bo-hou
Abstract: According to the key influencing factors of bedding rock cutting slope stability, the influences of slope height, load on the top of slope and engineering protection on the stability of bedding rock slope model with a group of the runned-through planes of weakness were studied by nonlinear FEM sreng...
2012, 12(2): 38-45. doi: 10.19818/j.cnki.1671-1637.2012.02.006
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Transportation vehicle engineering
Energy availability of active suspension without external energy supply
CHEN Shi-an, WANG Yong-gang, WANG Dong, HE Ren, LIU Hong-guang
Abstract: The absolute ratio of mean power reclaimed in the semi-active control mode divided by the value consumed in the active control mode was proposed as the evaluating index of energy availability for active suspension without external energy supply(ASWEES).The performance and energy availability of ASWE...
2012, 12(2): 46-52. doi: 10.19818/j.cnki.1671-1637.2012.02.007
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Estimation method of aeroengine pollution emissions
SUN Jian-zhong, ZUO Hong-fu, LIU Peng-peng, FU Yu
Abstract: On the basis of engine performance model, the effects of performance deterioration on engine pollution emissions, such as NOx, CO, UHC and Soot, were studied, and an estimation method of total emissions in flight based on flight parameters and engine performance model was proposed.By fitting ICAO em...
2012, 12(2): 53-61. doi: 10.19818/j.cnki.1671-1637.2012.02.008
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Augmented semi-virtual reality cockpit technology
TANG Yong, GU Hong-bin, LI Peng
Abstract: In order to enhance the visual sense of users and the interaction performance of human-cockpit system in the semi-virtual reality cockpit system, an augmented semi-virtual reality cockpit technolgy was presented, which incorporated a realistic view of hand into the virtual environments and made user...
2012, 12(2): 62-69. doi: 10.19818/j.cnki.1671-1637.2012.02.009
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Transportation planning and management
Macroscopic econometrics model of traffic accident
WANG Jun-lei, SUN Xiao-duan, HE Yu-long, HOU Shu-zhan
Abstract: From the points of macroscopic factors such as economic development level, population number, vehicle ownership and road condition, the regularities of traffic accidents at home and abroad were analyzed.The relations among per capita GDP and vehicle ownership per 1 000 population, mortality per 10 0...
2012, 12(2): 70-75. doi: 10.19818/j.cnki.1671-1637.2012.02.010
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Nested logit model of combined selection for travel mode and departure time
YANG Li-ya, SHAO Chun-fu, HAGHANI A
Abstract: Based on the maximum random utility theory, traveler characteristic, travel characteristic and the service level of travel mode were taken as utility variables, travel mode and departure time were taken as alternative parts, and two nested logit(NL) models were built, one structure with departure ti...
2012, 12(2): 76-83. doi: 10.19818/j.cnki.1671-1637.2012.02.011
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Forecasting and early-warning model of port traffic resource carrying capacity
JIAO Yu, KANG Yu-tao, YIN Xiao-bei, WANG Jin-hui, XU Le-ping
Abstract: Based on the calculation method of channel traffic capacity, the static carrying capacity model of channel resource was set up.According to the computing method of anchorage scale and basic judgment parameter, the classification model of anchorage resource carrying capacity was put forward.On the ba...
2012, 12(2): 84-92. doi: 10.19818/j.cnki.1671-1637.2012.02.012
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Temporal-spatial analysis model of traffic accident frequency on expressway
MA Zhuang-lin, SHAO Chun-fu, HU Da-wei, MA She-qiang
Abstract: In order to analyze the relationships among traffic accident frequency and potential influencing factors such as time, road space structure and traffic running environment, nine independent variables were selected from the aspects of time and space, two kinds of section divided methods were adopted,...
2012, 12(2): 93-99. doi: 10.19818/j.cnki.1671-1637.2012.02.013
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Traffic information engineering and control
Route choice model with preferences in traffic network
CHEN Jing-rong, XU Rui-hua
Abstract: In urban traffic network, when the attributes of times and costs for paths were confirmed, the path selection problems with the preferences of travelers or not were analyzed.When there were no preferences, the integrated attribute value of each path was obtained by using the information entropy theo...
2012, 12(2): 100-104. doi: 10.19818/j.cnki.1671-1637.2012.02.014
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K-nearest neighbor model of short-term traffic flow forecast
YU Bin, WU Shan-hua, WANG Ming-hua, ZHAO Zhi-hong
Abstract: In order to accurately forecast the short-term traffic flow, a K-nearest neighbor(K-NN) model was set up.The time and space parameters of the K-NN model were analyzed.Based on four different combinations of state vectors, the time dimension model, upstream section-time dimension model, downstream se...
2012, 12(2): 105-111. doi: 10.19818/j.cnki.1671-1637.2012.02.015
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Petri net model of maglev train running across different control systems
ZHENG Wei
Abstract: The general framework of running control system on maglev train was studied according to the running requirements of maglev train running across different control systems.Functional subsystems need to be added was defined.The hierarchical models of system key attributes, maglev operation procedures ...
2012, 12(2): 112-118. doi: 10.19818/j.cnki.1671-1637.2012.02.016
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Running conflict mechanism of high-speed railway tarin
WEN Chao, PENG Qi-yuan, CHEN Yu-hong
Abstract: During the running process of high-speed railway train, the distribution regularity and cumulative process of random interference were analyzed.The status deviation map of running plan was used, and the change mechanism of running delay for high-speed railway train was described.During the running p...
2012, 12(2): 119-126. doi: 10.19818/j.cnki.1671-1637.2012.02.017
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