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车辆/轨道相互作用理论研究进展及发展趋势
车辆 轨道 轮轨相互作用 动力学
2007/7/28
摘要车辆与轨道之间的动力学相互作用问题，是铁路轮轨系统中最基本的问题．高速、重载铁路的发展，加速了车辆／轨道相互作用研究进程，也提出了更多更新的课题．在回顾轮轨相互作用研究历史的基础上，着重阐述了近二十多年来国内外在该领域所取得的研究进展，并对车辆与轨道相互作用研究趋势以及今后需重点开展的研究课题，提出了作者的观点．
摘要建立了高速常导磁浮交通车辆轨道梁空间耦合模型，探讨了合理的磁浮线路功率谱形
式，利用分离迭代的数值积分方法求解了大规模非线性耦合动力方程. 利用计算结果分析了
随机不平顺对系统动力学指标影响规律，并采用功率谱密度曲线进行了谱分析，得到了高速
磁浮交通车梁耦合系统随机振动的基本规律.
Forecasts of petroleum demand
petroleum products modelling consumption of petroleum products forecast consumption of petroleum products
2010/11/1
Trends of consumption of petroleum products in Lithuania are analyzed. It is shown that these trends during the transition period to the market economy are not stable. Therefore, methods and models of...
A mathematical model to set speed limits for vehicles on the highway
speed limits seatbelt head-on collision impact force roads or highways
2010/11/1
The purpose of this paper is to develop a mathematical model that could guide certain speed limits for vehicles on roads. Excessive speeds on roads have been a major indirect cause of deaths on highwa...
The analysis of road infrastructure development financing in Lithuania
financing investments distribution transport roads
2010/11/2
The article describes major problems associated with the development of the Lithuanian roads, the priority areas and distribution of investments. The analysis performed and the calculations of investm...
Experimental research into motor vehicle oscillations in the case of changeable deceleration
oscillation deceleration flexible mounted and inflexible mounted vehicle masses braking
2010/11/2
In this paper processes of oscillation of flexible mounted and inflexible mounted masses are analysed. The tangential effect of the wheel contact with bearing surface is given, thus enabling more prec...
Vehicle speed control using road bumps: part 2
vehicle control road bumps speed limit accidents prevention effective distance
2010/11/2
In a previous publication in this journal the framework for the development of a model for the road bump problem was laid. The current paper focuses on the aspect of determining the effective distance...
Haulage trucks model with four electric separate wheel drives
automotive electronic systems electric vehicle in-wheel motor haulage truck four-wheel drive traction motor drives mining haul trucks
2010/11/2
This article contains a course of work of the construction of a vehicle model that has four electrical motors built into each wheel. During the project two models of a vehicle were constructed. A micr...
Dynamic processes of the retrofited rear suspension of the vehicle
vehicle rear suspension dynamics numerical methods
2010/11/2
The main aim of the investigation is to design rear suspension and to improve the dynamic characteristics of the vehicle. Three types of rear suspensions that consist of a leaf spring, a hydraulic and...
Improvement of the parameters of maitenance of medium speed Diesels applying the motor methods
diesel parameters of work process mathematical modelling optimisation motor methods harmful component’s emission
2010/11/2
The problem of the improvement of parameters of maintenance of medium speed diesel engines is described in the publication. The most rational way of solving this problem is the performing of calculati...
The quality of motor cars and its variation in time
quality of motor cars reliability probabilities of breakdown and breakdown-free operation
2010/11/2
The paper considers the quality of motor cars and its changes during the vehicle service life. The process is analysed in terms of the theory of reliability. The emphasis is placed on the analysis of ...
Analysis and forecast of the dymanic passenger transportation by public land transport
public transport road and railway transport forecast multiple regression analysis long-distance and international transportation regression equation
2010/11/2
In the presented paper the dynamics of passenger haulage by public transport is considered and a forecast is made. In Lithuania the total volume of passenger transportation by public land transport co...
Analysis of wearing-out causes for revolving-blade mixers and their reliability improvement
revolving-blade mixer grain sticking, wear, mix homogeneity elastic centrifugal coupling reliability improvement
2010/11/2
In road coverings and structures of transport infrastructure, composite mixes of various compositions are used made with either organic or mineral binding agents. Most often they are made in a discree...
Thermal conditions of road pavements and their influence on motor traffic
thermal conditions road pavement temperature plastic deformations
2010/11/2
The article presents the analysis of climatic conditions in the Republic of Lithuania and describes their influence on road asphalt concrete pavement. Dependence of the main properties of asphalt conc...
Realization effects of enforcing the EU regulation on the installation of recording equipment in vehicles
regulation tachograph roads transport effects work relaxation
2010/11/3
Preparing to become a member of the European Union Lithuania will have to keep the requirements of the EU Regulation 3821/85 EEC in road transport. It concerns the installation of recording equipment ...