2007 Vol. 7, No. 3

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Analysis model of vertical vibration of high-speed train and Bögle slab track system
Xiang Jun, He Dan
Abstract: According to the structural characteristics of Bögle slab track, a new model of lateral finite strip and slab segment element was put forward, and the vertical vibration responses of high-speed train and Bögle slab track system were analyzed.In the model, the locomotive and trailer of high-speed tra...
2007, 7(3): 1-5.
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Dynamics modeling of low-speed maglev vehicle system and simulation of its guidance mechanisms
Ye Xue-yan, Zhao Chun-fa, Zhai Wan-ming
Abstract: Low-speed maglev vehicle structures and their kinematic relationship were analyzed, a 76-DOFs virtual prototype model with active levitation control was developed by SIMPACK software, the numerical simulation of guidance mechanisms was carried out based on the model, and the kinematic rules of T-sha...
2007, 7(3): 6-10.
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Interval mathematics analysis method of running parameters influence on automobile fuel economy
He Ren, Zhuang Zhi-hua, Zheng Ji-ping
Abstract: In order to improve automobile fuel economy, the basic concept of interval mathematics was introduced, the mathematic model of engine universal characteristics was set up by using Matlab, the influence degrees of driving speed, loading mass and road resistance coefficient on automobile fuel economy ...
2007, 7(3): 11-15.
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Quantitative diagnosis method of engine sliding bearing failure
Wang Wei, Ma Wen-yan, Wang Yu, Wang Feng-qi
Abstract: In order to implement the quantitative diagnosis of engine sliding bearing failure, a simulation experiment on the relationship between the clearance of connecting rod bearings and their failures for EQ6100-1 model engine was conducted by using vibration monitoring technique, some characteristic par...
2007, 7(3): 16-20.
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Computation model of lateral collision rate on parallel routesbased on VOR navigation
Zhang Zhao-ning, Zhang Xiao-yan, Li Dong-bin
Abstract: In order to effectively confirm the safe separation of parallel routes and evaluate collision risk, lateral collision influence factors were analyzed, Reich model and probability theory were introduced, and a computation model of lateral collision rate on parallel routes was established based on VOR...
2007, 7(3): 21-24.
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Generalized S-transform method of rotor impact-rub fault signal of aeroengine
Zhang Zhi-yu, Lu Yan-jun, Zhang Jiu-long
Abstract: In order to effectively pick out the impact-rub fault signal of aeroengine rotor, improve fault diagnosis veracity, the impact-rub signal was transformed to phase space by using generalized S-transform, the features of fault signal were detected in phase space, and the results obtained by using gene...
2007, 7(3): 25-28.
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Aeroengine scheduling method under condition-based maintenance strategy
Bai Fang, Zuo Hong-fu, Wen Zhen-hua, Rong Xiang, Zhao Hong-hua
Abstract: Based on the modeling thought of modern scheduling theory, the requirement property for aeroengines and the turnover property of aeroengine maintenance were analyzed, the concept of work note was introduced, a scheduling model of aeroengines under condition-based maintenance strategy was established...
2007, 7(3): 29-33.
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Automatic creating algorithm of route based on dynamic grid model
Li Yuan-hui, Pan Ming-yang, Wu Xian
Abstract: In order to use the abundant information of electronic chart to plan route, an automatic creating algorithm of route based on dynamic grid model was put forward. The navigability of every single square in the model was judged and classified by using a fast algorithm. A coding scheme of square connec...
2007, 7(3): 34-39.
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Ship motion mathematical model with six degrees of freedom in regular wave
Zhang Xiu-feng, Yin Yong, Jin Yi-cheng
Abstract: In order to improve the precision of ship-handling simulator, a ship motion mathematical model with six degrees of freedom(DOF) in regular wave was put forward by using separate modeling theory based on Froude-Krylov hypothesis. In the model, ship was regarded as trunk ship, the interferential force...
2007, 7(3): 40-43.
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Optimization model of network distribution planning on regional container ports
Zhao Xu, Yang Zan, Jin Zhi-hong, Ji Ming-jun
Abstract: In order to avoid the repetitive construction of container ports in transportation network, and realize the optimization distribution of ports, the general interaction and decision equilibrium between container port planner and user according to Stackelberg model were considered, and an optimization...
2007, 7(3): 44-49.
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Dynamic space deployment model of container storage yard
Li Jian-zhong, Ding Yi-zhong, Wang Bin
Abstract: In order to optimize the space of container storage yard and reduce vehicle travel distance, mathematics planning method was applied, the balancing quantity of container and the minimum travel distance of vehicle were considered, a dynamic space deployment model of container storage yard was set up ...
2007, 7(3): 50-55.
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Structure design of asphalt pavement based on cross-anisotropy of macadam base
Li Zhen-feng, Xu Ge-ning, Guo Xiang-yun
Abstract: In order to analyze the effect of macadam cross-anisotropy on asphalt pavement structure design, and evaluate the performance of asphalt pavement with macadam base, state-space theory was used, cross-anisotropic layered elastic system theory was established, pavement structure analytical program ANI...
2007, 7(3): 56-60.
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Road performance comparison of different asphalt mastics
Peng Bo, Ding Zhi-yong, Dai Jing-liang
Abstract: In order to study the road properties of different asphalt mastics, some systematic tests on penetration, cone penetration, basket drainage, adhesion quality, dynamic shear, bending beam rheometer were done, the influences of the constituters, temperature and proportion of asphalt mastic on the road...
2007, 7(3): 61-65.
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Sectioned linear fitting method of parameters for asphalt mastics viscoelastic Burgers model
Tian Li, Hu Xia-guang, Liu Yu, Sha Ai-min
Abstract: The static creep curve character of asphalt mastics was analyzed, the head section and end section of the curve were fitted by sectioned linear fitting method, the parameters of asphalt mastics viscoelastic Burgers model were solved in the condition of shear creep, and sectioned linear fitting metho...
2007, 7(3): 66-69.
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Influence factors and simplified calculation of interbedded shear stress of asphalt paving on steel bridge
Gu Xing-yu, Wu Yi-ming
Abstract: In order to minish the interbedded shear stress of asphalt paving, 3-D finite element model of bridge deck was set up, the influences of load position, steel deck thickness, the open width of U shape rib, asphalt thickness, asphalt modulus, contact condition and heavy load on the longitudinal-transv...
2007, 7(3): 70-75.
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Forecast model of expressway maintenance cost
Yu Ying, Wang Qi-lin, Tian Jin-yue
Abstract: In order to decrease expressway maintenance cost, the mathematic model between maintenance cost and the factors of traffic flow and road length was established by using the management theory of marginal cost, aimed at preventive maintenance and special project maintenance for asphalt pavement on exp...
2007, 7(3): 76-79.
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Application of uncertainty inference represented by credence in expert system for soft ground improvement of highway
Zhang Liu-jun, Huang Xiao-ming, Yin Li-hua
Abstract: In order to improve the scientificity of highway soft ground improvement, the characters of uncertainty, mistiness and multifactor influence for highway soft ground improvement knowledge were analyzed, uncertainty inference represented by credence was introduced into the expert system for soft groun...
2007, 7(3): 80-85.
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Central angle influence of long-span curve bridge on its inner forces, displacements and stability
Wang Jun-li, He Shuan-hai
Abstract: In order to improve the safety of long-span curve bridge with high piers, the large distortion and material nonlinearity of the bridge were considered, the inner forces and displacements of piers of typical curve rigid frame bridges with different central angles of curve were computed by using finit...
2007, 7(3): 86-90.
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3-D numerical analysis of large subsoil liquefaction distortion influence resulted from earthquake on bridge pile foundation
Tong Li-yuan, Wang Bin, Liu Yi-huai
Abstract: In order to study large subsoil liquefaction distortion influence resulted from earthquake on bridge pile foundation, typical computation models in two and three soil layers were set up, the interaction nonlinearity relation between pile and soil was analyzed, the dynamic finite difference analysis ...
2007, 7(3): 91-94.
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Reliability computation method of urban road network
Liu Yong, Xiang Li, Xie Jun, Yan Bao-jie
Abstract: In order to objectively reflect the reliability of urban road network, the structure and function of urban road network were analyzed, OD road network was divided into main roads and connection roads, the influence factors and the computation method of the reliability were studied, the main road rel...
2007, 7(3): 95-99.
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Optimal route arithmetic with multigoals in highway network based on travel decision-making
Ma Yong-feng, Lu Jian, Xiang Qiao-jun, Wei Lian-yu
Abstract: To synthetically consider the correlative influence factors of road environment and special user's desires of optimal route selection in the static optimal route search with multigoals in highway network, user-system decision-making model of optimal route search under GIS environment was studied.Bas...
2007, 7(3): 100-105.
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Public transport planning of developing city based on TOD mode
Yu Jie, Yang Xiao-guang, Yin Rui, Xia Sheng-guo
Abstract: In order to realize the harmonious improvement of land use and city traffic, TOD was introduced into the public traffic planning of developing city, its public traffic development demand was analyzed, a hub-oriented planning strategy of harmonious improvement was put forward, three kinds of planning...
2007, 7(3): 106-110.
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Trip mode transfer model by simulating quantum jump
Yao Rong-han, Wang Dian-hai
Abstract: To quantificationally describe trip mode transfer rules, the comparability between trip mode transfer and quantum jump was analyzed in detail, and a trip mode transfer model was put forward according to quantum energy level jump theory. In order to calibrate the model, the polynomial imitation equat...
2007, 7(3): 111-115.
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Analysis of transportation behavior essence and its characteristics
Wu Qun-qi, Huang Zhi-ying
Abstract: In order to rebuild the theory system of transport economics, the essence of transportation behavior was analyzed by using basic motive mechanism in economics. It is pointed that the essence of transportation behavior is to realize resource-optimized collocation according to the move of people or go...
2007, 7(3): 116-120.
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Extended model for optimal design of remanufacturing logistics network
Ma Zu-jun, Dai Ying
Abstract: The problem on designing an appropriate integrated logistics network structure for hybrid manufacturing/remanufacturing systems was investigated, the integration of various facilities and combined transportation of forward and reverse logistics in the network was considered, the impact of scale econ...
2007, 7(3): 121-126.
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