2011 Vol. 11, No. 5

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Influence of rubber particles on micro-surfacing performance and its noise-reduction effect
LING Tian-qing, LI Yao-nan, DONG Qiang, ZHAO Mei-ling, ZHENG Zhi-neng, ZHAO Zhi-jie
Abstract: The impact of adding rubber particles on the water stability, wear resistance and other road performances of slurry mixture were compared by using wet track abrasion test, load wheel test and stability and resistance to compaction test.The attenuation characteristics of tyre vertical vibration that ...
2011, 11(5): 1-5. doi: 10.19818/j.cnki.1671-1637.2011.05.001
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Computation model of bridging stress for flexible short fiber in asphalt at low temperature
DING Zhi-yong, PENG Bo, WANG Zhen-jun
Abstract: The characteristics of flexible-fiber-reinforced brittle materials were analyzed, and a mechanical model of single fiber pulled out from asphalt at low temperature was established.In spherical coordinate, a computation model of bridging stress for short fiber was established when short fibers unifor...
2011, 11(5): 6-11. doi: 10.19818/j.cnki.1671-1637.2011.05.002
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Gradation design method of coarse aggregate for interlocking-dense cement concrete
WANG Lei, MA Biao, KOU Jun-ping
Abstract: According to the roles of coarse aggregate in cement concrete, the aggregate filling ratio was put forward to present the relationship between coarse aggregate gradation structure and aggregate particle.Based on particle interference theory and particle filling theory, the design idea of volumetric ...
2011, 11(5): 12-17. doi: 10.19818/j.cnki.1671-1637.2011.05.003
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Practical updating method of finite element model for long-span steel truss suspension bridge
HAN Wan-shui, WANG Tao, LI Yong-qing, LI Yan-wei, HUANG Ping-ming
Abstract: Based on the engineering background of the super long-span steel truss suspension bridge over Sidu River Deep-Cutting Gorge on Hu-Rong National Highway, the influences of suspension bridge structural nonlinear and gravity stiffness were comprehensively considered, an updating programme of bridge mod...
2011, 11(5): 18-27. doi: 10.19818/j.cnki.1671-1637.2011.05.004
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Evaluating system of integrated grounding effectiveness on high-speed railway
WANG Bo, WU Guang-ning, ZHOU Li-jun, DONG An-ping, GAO Guo-qiang, FAN Jian-bin
Abstract: The decreasing degree of rail potential was taken as a standard for evaluating integrated grounding effectiveness.The relationship among rail potential, integrated grounding line impedance and shunt coefficient was analyzed.The integrated grounding effectiveness evaluating system(IGEES) was develope...
2011, 11(5): 28-34. doi: 10.19818/j.cnki.1671-1637.2011.05.005
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Operating properties of preinjection NC air-powered engine
CHEN Shi-an, ZHANG Shi-jin, HE Ren
Abstract: To settle the seal matters in valve train system, a new preinjection NC air-powered engine was designed, its thermo-dynamics model was proposed.The model was made up of the thermo-flow rate equations of preinjection cylinder & working cylinder and the dynamics equations of the engine.The operati...
2011, 11(5): 35-41. doi: 10.19818/j.cnki.1671-1637.2011.05.006
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Calculation method of cross wind security domain for high-speed train
CUI Tao, ZHANG Wei-hua
Abstract: Based on parameter transmission, solution to control and dynamic mesh techniques, the cross wind fluid dynamics model and the multi-body system dynamics model of high-speed train were established.By collaboratively simulating the external flow field and system response of train, the stable attitudes...
2011, 11(5): 42-48. doi: 10.19818/j.cnki.1671-1637.2011.05.007
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Influence of braking pipe on braking performance for heavy haul train
WEI Wei, DU Nian-bo
Abstract: With fluid dynamics theory, the models of braking pipe and distributing valve for heavy haul train were built, the equations of braking pipe and boundary point were solved, the braking system performances in braking process were simulated, and the influence of the lengths of main pipe and branch pip...
2011, 11(5): 49-54. doi: 10.19818/j.cnki.1671-1637.2011.05.008
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Coupling dynamics performance of vehicle-track under cross wind
LI Tian, ZHANG Ji-ye, ZHANG Wei-hua
Abstract: A coupling dynamics model of vehicle-track was established by using multi-body system dynamics theory, a new explcit integration method was used to solve the dynamics equations of the model, wheel-rail normal contact force was calculated by using nonlinear Hertz contact theory, wheel-rail creep forc...
2011, 11(5): 55-60. doi: 10.19818/j.cnki.1671-1637.2011.05.009
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Pressure gradient experiment and influence factor analysis of automotive hydraulic ABS
XU Guo-min, MA Ming-xing, HUANG Jin-chuan, GUAN Yan-cai
Abstract: Based on anti-1ock braking system(ABS) hydraulic test bench, PCMCIA-DAQ1200 acquisition card and LabVIEW software were used, the test program of ABS pressure gradient was written, and the data acquisition was realized automatically.The various experimental tests of ABS pressure gradient were carried...
2011, 11(5): 61-68. doi: 10.19818/j.cnki.1671-1637.2011.05.010
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A novel detection system of automobile ABS
HAO Ru-ru, ZHAO Xiang-mo, MA Jian, XU Zhi-gang
Abstract: In order to improve the detection efficiency of automobile ABS, a novel detection system was developed based on bench.The inertia of moving automobile was simulated by using the rotational inertia of flywheel.Four torque controllers were adopted to load different torques on four rollers supporting f...
2011, 11(5): 69-75. doi: 10.19818/j.cnki.1671-1637.2011.05.011
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Multi-objective lattice-order decision-making method of scheme selection for rail transit network
LIU Yu-zeng, QIAN Bing-yi
Abstract: Aimed for the rational limitation of decision-maker, the multi-objective lattice-order decision-making method was introduced into the scheme selection of rail transit network.The evaluation index system of multi-objective lattice-order decision-making for urban rail transit network was constructed.E...
2011, 11(5): 76-82. doi: 10.19818/j.cnki.1671-1637.2011.05.012
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Location model of railway passenger station
ZHANG Tian-wei, NIE Lei, GAO Gui-feng
Abstract: Influence factors were divided into non-mandatory meet qualitative factors, mandatory meet qualitative factors and quantitative factors, and a location model of railway passenger station was proposed.The generated method and process of three kinds of influence factors were given.The contribution val...
2011, 11(5): 83-87. doi: 10.19818/j.cnki.1671-1637.2011.05.013
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Driving risk evaluation model of freeway interchange entrance area
WANG Xiao-fei, FU Xin-sha, GE Ting
Abstract: The traffic characteristics of freeway interchange entrance area were analyzed, and the concept of collision risk index(CRI) was put forward.The coefficient of collision possibility, speed difference between two colliding vehicles, colliding speed and acceleration of following vehicle, vehicle spaci...
2011, 11(5): 88-92. doi: 10.19818/j.cnki.1671-1637.2011.05.014
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Structure analysis and calculation method of freight turnover for regional highway
YANG Ming, QIN Hua-rong, CHEN Yin-san
Abstract: In order to solve the problem of the structural data loss of highway freight turnover, highway freight turnover was divided into vehicle freight turnover and highway network freight turnover.Relying on vehicle annual inspection platform, sampling survey was carried out, and vehicle freight turnover ...
2011, 11(5): 93-100. doi: 10.19818/j.cnki.1671-1637.2011.05.015
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Green wave coordinated control optimization models oriented to different bidirectional bandwidth demands
LU Kai, ZHENG Shu-jian, XU Jian-min, LI Lin
Abstract: A new performance index function of green wave coordinated control model was built by introducing bandwidth proration impact factor and bandwidth demand ratio.The green wave coordinated control optimization models oriented to different bidirectional bandwidth demands were proposed for MAXBAND(MULTIB...
2011, 11(5): 101-108. doi: 10.19818/j.cnki.1671-1637.2011.05.016
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Control model of variable speed limit based on finite horizon Markov decision-making
WANG Wei, YANG Zhao-sheng, ZHAO Ding-xuan
Abstract: The function of variable speed limit(VSL) on expressway mainline was analyzed, and the existing methods of speed limit were studied.The control process of VSL was taken as Markov decision-making process of discrete time.A model of VSL based on reinforcement learning and finite horizon Markov decisio...
2011, 11(5): 109-114. doi: 10.19818/j.cnki.1671-1637.2011.05.017
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Static test method of high-precision attitude measurement technology
TANG Jun, WANG An-guo, ZHANG Lei
Abstract: In the case of specific observation time and place, the attitude measurement system was assumed in reference attitude, and the trace and time informations of one star could be calculated in advance.The actual movement trace and time information of star were made in accord with calculated trace by ad...
2011, 11(5): 115-119. doi: 10.19818/j.cnki.1671-1637.2011.05.018
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Simulation evaluation of safeguard measure for traffic safety on montane highway
GUO Feng-xiang, XIONG Jian, QIN Ya-qin, WAN Hua-sen
Abstract: The tunnel group, climbing section and mixed traffic section of Yunnan Xiaomo Highway from K109+600 to K122+024 were selected as experiment sample sections, and their static and dynamic 3D models were established by using virtual scene generation system.Central isolation installations such as lodgin...
2011, 11(5): 120-126. doi: 10.19818/j.cnki.1671-1637.2011.05.019
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